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Diffstat (limited to 'src/style.cpp')
| -rw-r--r-- | src/style.cpp | 3703 |
1 files changed, 3703 insertions, 0 deletions
diff --git a/src/style.cpp b/src/style.cpp new file mode 100644 index 000000000..afaded2a1 --- /dev/null +++ b/src/style.cpp @@ -0,0 +1,3703 @@ +#define __SP_STYLE_C__ + +/** \file + * SVG stylesheets implementation. + * + * Authors: + * Lauris Kaplinski <lauris@kaplinski.com> + * Peter Moulder <pmoulder@mail.csse.monash.edu.au> + * bulia byak <buliabyak@users.sf.net> + * + * Copyright (C) 2001-2002 Lauris Kaplinski + * Copyright (C) 2001 Ximian, Inc. + * Copyright (C) 2005 Monash University + * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "libcroco/cr-sel-eng.h" +#include "xml/croco-node-iface.h" + +#include "svg/svg.h" + +#include "display/canvas-bpath.h" +#include "attributes.h" +#include "document.h" +#include "extract-uri.h" +#include "marker-status.h" +#include "uri-references.h" +#include "sp-paint-server.h" +#include "streq.h" +#include "strneq.h" +#include "style.h" +#include "svg/css-ostringstream.h" +#include "xml/repr.h" +#include "unit-constants.h" +#include "isnan.h" + +namespace Inkscape { + +/** + * Parses a CSS url() specification; temporary hack until + * style stuff is redone. + * \param string the CSS string to parse + * \return a newly-allocated URL string (or NULL); free with g_free() + */ +gchar *parse_css_url(gchar const *string) { + if (!string) + return NULL; + + gchar const *iter = string; + for ( ; g_ascii_isspace(*iter) ; iter = g_utf8_next_char(iter) ); + if (strncmp(iter, "url(", 4)) + return NULL; + iter += 4; + + gchar const end_char = *iter; + if ( *iter == '"' || *iter == '\'' ) { + iter += 1; + } + + GString *temp = g_string_new(NULL); + for ( ; *iter ; iter = g_utf8_next_char(iter) ) { + if ( *iter == '(' || *iter == ')' || + *iter == '"' || *iter == '\'' || + g_ascii_isspace(*iter) || + g_ascii_iscntrl(*iter) ) + { + break; + } + if ( *iter == '\\' ) { + iter = g_utf8_next_char(iter); + } + if ( *iter & (gchar)0x80 ) { + break; + } else { + g_string_append_c(temp, *iter); + } + } + + if ( *iter == end_char && end_char != ')' ) { + iter = g_utf8_next_char(iter); + } + gchar *result; + if ( *iter == ')' ) { + result = temp->str; + g_string_free(temp, FALSE); + } else { + result = NULL; + g_string_free(temp, TRUE); + } + + return result; +} + +} + +#define BMAX 8192 + +class SPStyleEnum; + +/*######################### +## FORWARD DECLARATIONS +#########################*/ +static void sp_style_clear(SPStyle *style); + +static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val); + +static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent); +static void sp_style_read_dash(SPStyle *style, gchar const *str); + +static SPTextStyle *sp_text_style_new(void); +static void sp_text_style_clear(SPTextStyle *ts); +static SPTextStyle *sp_text_style_unref(SPTextStyle *st); +static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st); +static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET); +static void sp_style_privatize_text(SPStyle *style); + +static void sp_style_read_ifloat(SPIFloat *val, gchar const *str); +static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str); +static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit); +static void sp_style_read_istring(SPIString *val, gchar const *str); +static void sp_style_read_ilength(SPILength *val, gchar const *str); +static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str); +static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str); +static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document); +static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document); +static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str); + +static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit); +static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key); +static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key); +static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key); + +static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags); +static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags); +static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags); +static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags); +static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags); +static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags); +static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags); +static gint sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key, SPILengthOrNormal const *const val, SPILengthOrNormal const *const base, guint const flags); +static gint sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key, SPITextDecoration const *const val, SPITextDecoration const *const base, guint const flags); + +void css2_unescape_unquote (SPIString *val); + +static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint, unsigned hunref, unsigned unset); + +#define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));} +#define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));} + +#define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));} +#define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));} + +#define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));} + +#define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));} +#define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));} + +static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *); + +struct SPStyleEnum { + gchar const *key; + gint value; +}; + +static SPStyleEnum const enum_fill_rule[] = { + {"nonzero", SP_WIND_RULE_NONZERO}, + {"evenodd", SP_WIND_RULE_EVENODD}, + {NULL, -1} +}; + +static SPStyleEnum const enum_stroke_linecap[] = { + {"butt", SP_STROKE_LINECAP_BUTT}, + {"round", SP_STROKE_LINECAP_ROUND}, + {"square", SP_STROKE_LINECAP_SQUARE}, + {NULL, -1} +}; + +static SPStyleEnum const enum_stroke_linejoin[] = { + {"miter", SP_STROKE_LINEJOIN_MITER}, + {"round", SP_STROKE_LINEJOIN_ROUND}, + {"bevel", SP_STROKE_LINEJOIN_BEVEL}, + {NULL, -1} +}; + +static SPStyleEnum const enum_font_style[] = { + {"normal", SP_CSS_FONT_STYLE_NORMAL}, + {"italic", SP_CSS_FONT_STYLE_ITALIC}, + {"oblique", SP_CSS_FONT_STYLE_OBLIQUE}, + {NULL, -1} +}; + +static SPStyleEnum const enum_font_size[] = { + {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL}, + {"x-small", SP_CSS_FONT_SIZE_X_SMALL}, + {"small", SP_CSS_FONT_SIZE_SMALL}, + {"medium", SP_CSS_FONT_SIZE_MEDIUM}, + {"large", SP_CSS_FONT_SIZE_LARGE}, + {"x-large", SP_CSS_FONT_SIZE_X_LARGE}, + {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE}, + {"smaller", SP_CSS_FONT_SIZE_SMALLER}, + {"larger", SP_CSS_FONT_SIZE_LARGER}, + {NULL, -1} +}; + +static SPStyleEnum const enum_font_variant[] = { + {"normal", SP_CSS_FONT_VARIANT_NORMAL}, + {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS}, + {NULL, -1} +}; + +static SPStyleEnum const enum_font_weight[] = { + {"100", SP_CSS_FONT_WEIGHT_100}, + {"200", SP_CSS_FONT_WEIGHT_200}, + {"300", SP_CSS_FONT_WEIGHT_300}, + {"400", SP_CSS_FONT_WEIGHT_400}, + {"500", SP_CSS_FONT_WEIGHT_500}, + {"600", SP_CSS_FONT_WEIGHT_600}, + {"700", SP_CSS_FONT_WEIGHT_700}, + {"800", SP_CSS_FONT_WEIGHT_800}, + {"900", SP_CSS_FONT_WEIGHT_900}, + {"normal", SP_CSS_FONT_WEIGHT_NORMAL}, + {"bold", SP_CSS_FONT_WEIGHT_BOLD}, + {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER}, + {"bolder", SP_CSS_FONT_WEIGHT_BOLDER}, + {NULL, -1} +}; + +static SPStyleEnum const enum_font_stretch[] = { + {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED}, + {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED}, + {"condensed", SP_CSS_FONT_STRETCH_CONDENSED}, + {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED}, + {"normal", SP_CSS_FONT_STRETCH_NORMAL}, + {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED}, + {"expanded", SP_CSS_FONT_STRETCH_EXPANDED}, + {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED}, + {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED}, + {"narrower", SP_CSS_FONT_STRETCH_NARROWER}, + {"wider", SP_CSS_FONT_STRETCH_WIDER}, + {NULL, -1} +}; + +static SPStyleEnum const enum_text_align[] = { + {"start", SP_CSS_TEXT_ALIGN_START}, + {"end", SP_CSS_TEXT_ALIGN_END}, + {"left", SP_CSS_TEXT_ALIGN_LEFT}, + {"right", SP_CSS_TEXT_ALIGN_RIGHT}, + {"center", SP_CSS_TEXT_ALIGN_CENTER}, + {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY}, + {NULL, -1} +}; + +static SPStyleEnum const enum_text_transform[] = { + {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE}, + {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE}, + {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE}, + {"none", SP_CSS_TEXT_TRANSFORM_NONE}, + {NULL, -1} +}; + +static SPStyleEnum const enum_text_anchor[] = { + {"start", SP_CSS_TEXT_ANCHOR_START}, + {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE}, + {"end", SP_CSS_TEXT_ANCHOR_END}, + {NULL, -1} +}; + +static SPStyleEnum const enum_direction[] = { + {"ltr", SP_CSS_DIRECTION_LTR}, + {"rtl", SP_CSS_DIRECTION_RTL}, + {NULL, -1} +}; + +static SPStyleEnum const enum_block_progression[] = { + {"tb", SP_CSS_BLOCK_PROGRESSION_TB}, + {"rl", SP_CSS_BLOCK_PROGRESSION_RL}, + {"lr", SP_CSS_BLOCK_PROGRESSION_LR}, + {NULL, -1} +}; + +static SPStyleEnum const enum_writing_mode[] = { + /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the + * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial + * value is lr-tb rather than lr. + * + * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so + * sharing enumerators for different strings may be a bug (once we support ecma script). + */ + {"lr-tb", SP_CSS_WRITING_MODE_LR_TB}, + {"rl-tb", SP_CSS_WRITING_MODE_RL_TB}, + {"tb-rl", SP_CSS_WRITING_MODE_TB_RL}, + {"lr", SP_CSS_WRITING_MODE_LR_TB}, + {"rl", SP_CSS_WRITING_MODE_RL_TB}, + {"tb", SP_CSS_WRITING_MODE_TB_RL}, + {NULL, -1} +}; + +static SPStyleEnum const enum_visibility[] = { + {"hidden", SP_CSS_VISIBILITY_HIDDEN}, + {"collapse", SP_CSS_VISIBILITY_COLLAPSE}, + {"visible", SP_CSS_VISIBILITY_VISIBLE}, + {NULL, -1} +}; + +static SPStyleEnum const enum_overflow[] = { + {"visible", SP_CSS_OVERFLOW_VISIBLE}, + {"hidden", SP_CSS_OVERFLOW_HIDDEN}, + {"scroll", SP_CSS_OVERFLOW_SCROLL}, + {"auto", SP_CSS_OVERFLOW_AUTO}, + {NULL, -1} +}; + +static SPStyleEnum const enum_display[] = { + {"none", SP_CSS_DISPLAY_NONE}, + {"inline", SP_CSS_DISPLAY_INLINE}, + {"block", SP_CSS_DISPLAY_BLOCK}, + {"list-item", SP_CSS_DISPLAY_LIST_ITEM}, + {"run-in", SP_CSS_DISPLAY_RUN_IN}, + {"compact", SP_CSS_DISPLAY_COMPACT}, + {"marker", SP_CSS_DISPLAY_MARKER}, + {"table", SP_CSS_DISPLAY_TABLE}, + {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE}, + {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP}, + {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP}, + {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP}, + {"table-row", SP_CSS_DISPLAY_TABLE_ROW}, + {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP}, + {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN}, + {"table-cell", SP_CSS_DISPLAY_TABLE_CELL}, + {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION}, + {NULL, -1} +}; + +static SPStyleEnum const enum_shape_rendering[] = { + {"auto", 0}, + {"optimizeSpeed", 0}, + {"crispEdges", 0}, + {"geometricPrecision", 0}, + {NULL, -1} +}; + +static SPStyleEnum const enum_color_rendering[] = { + {"auto", 0}, + {"optimizeSpeed", 0}, + {"optimizeQuality", 0}, + {NULL, -1} +}; + +static SPStyleEnum const *const enum_image_rendering = enum_color_rendering; + +static SPStyleEnum const enum_text_rendering[] = { + {"auto", 0}, + {"optimizeSpeed", 0}, + {"optimizeLegibility", 0}, + {"geometricPrecision", 0}, + {NULL, -1} +}; + +/** + * Release callback. + */ +static void +sp_style_object_release(SPObject *object, SPStyle *style) +{ + style->object = NULL; +} + + + + +/** + * Returns a new SPStyle object with settings as per sp_style_clear(). + */ +SPStyle * +sp_style_new() +{ + SPStyle *const style = g_new0(SPStyle, 1); + + style->refcount = 1; + style->object = NULL; + style->text = sp_text_style_new(); + style->text_private = TRUE; + + sp_style_clear(style); + + style->cloned = false; + + return style; +} + + +/** + * Creates a new SPStyle object, and attaches it to the specified SPObject. + */ +SPStyle * +sp_style_new_from_object(SPObject *object) +{ + g_return_val_if_fail(object != NULL, NULL); + g_return_val_if_fail(SP_IS_OBJECT(object), NULL); + + SPStyle *style = sp_style_new(); + style->object = object; + g_signal_connect(G_OBJECT(object), "release", G_CALLBACK(sp_style_object_release), style); + + if (object && SP_OBJECT_IS_CLONED(object)) { + style->cloned = true; + } + + return style; +} + + +/** + * Increase refcount of style. + */ +SPStyle * +sp_style_ref(SPStyle *style) +{ + g_return_val_if_fail(style != NULL, NULL); + g_return_val_if_fail(style->refcount > 0, NULL); + + style->refcount += 1; + + return style; +} + + +/** + * Decrease refcount of style with possible destruction. + */ +SPStyle * +sp_style_unref(SPStyle *style) +{ + g_return_val_if_fail(style != NULL, NULL); + g_return_val_if_fail(style->refcount > 0, NULL); + + style->refcount -= 1; + + if (style->refcount < 1) { + if (style->object) + g_signal_handlers_disconnect_matched(G_OBJECT(style->object), + G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style); + if (style->text) sp_text_style_unref(style->text); + sp_style_paint_clear(style, &style->fill, TRUE, FALSE); + sp_style_paint_clear(style, &style->stroke, TRUE, FALSE); + g_free(style->stroke_dash.dash); + g_free(style); + } + + return NULL; +} + +/** + * Reads the various style parameters for an object from repr. + */ +static void +sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr) +{ + g_assert(style != NULL); + g_assert(repr != NULL); + g_assert(!object || (SP_OBJECT_REPR(object) == repr)); + + sp_style_clear(style); + + if (object && SP_OBJECT_IS_CLONED(object)) { + style->cloned = true; + } + + /* 1. Style itself */ + gchar const *val = repr->attribute("style"); + if (val != NULL) { + sp_style_merge_from_style_string(style, val); + } + + if (object) { + sp_style_merge_from_object_stylesheet(style, object); + } else { + /** \todo No stylesheet information. Find out under what circumstances + * this occurs, and handle accordingly. (If we really wanted to, we + * could probably get stylesheets by going through repr->doc.) + */ + } + + /* 2. Presentation attributes */ + /* CSS2 */ + SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true); + SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true); + SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true); + /* Font */ + SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size"); + SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true); + SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true); + SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true); + SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true); + /* Text (css2 chapter 16) */ + SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent"); + SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true); + if (!style->text_decoration.set) { + val = repr->attribute("text-decoration"); + if (val) { + sp_style_read_itextdecoration(&style->text_decoration, val); + } + } + if (!style->line_height.set) { + val = repr->attribute("line-height"); + if (val) { + sp_style_read_ilengthornormal(&style->line_height, val); + } + } + if (!style->letter_spacing.set) { + val = repr->attribute("letter-spacing"); + if (val) { + sp_style_read_ilengthornormal(&style->letter_spacing, val); + } + } + if (!style->word_spacing.set) { + val = repr->attribute("word-spacing"); + if (val) { + sp_style_read_ilengthornormal(&style->word_spacing, val); + } + } + SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true); + SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true); + SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true); + + /* SVG */ + SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode", + enum_writing_mode, true); + SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor", + enum_text_anchor, true); + + /* opacity */ + if (!style->opacity.set) { + val = repr->attribute("opacity"); + if (val) { + sp_style_read_iscale24(&style->opacity, val); + } + } + /* color */ + if (!style->color.set) { + val = repr->attribute("color"); + if (val) { + sp_style_read_icolor(&style->color, val, style, ( object + ? SP_OBJECT_DOCUMENT(object) + : NULL )); + } + } + /* fill */ + if (!style->fill.set) { + val = repr->attribute("fill"); + if (val) { + sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL); + } + } + /* fill-opacity */ + if (!style->fill_opacity.set) { + val = repr->attribute("fill-opacity"); + if (val) { + sp_style_read_iscale24(&style->fill_opacity, val); + } + } + /* fill-rule */ + SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true); + /* stroke */ + if (!style->stroke.set) { + val = repr->attribute("stroke"); + if (val) { + sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL); + } + } + SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width"); + SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true); + SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true); + SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit"); + + /* markers */ + if (!style->marker[SP_MARKER_LOC].set) { + val = repr->attribute("marker"); + if (val) { + sp_style_read_istring(&style->marker[SP_MARKER_LOC], val); + } + } + if (!style->marker[SP_MARKER_LOC_START].set) { + val = repr->attribute("marker-start"); + if (val) { + sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val); + } + } + if (!style->marker[SP_MARKER_LOC_MID].set) { + val = repr->attribute("marker-mid"); + if (val) { + sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val); + } + } + if (!style->marker[SP_MARKER_LOC_END].set) { + val = repr->attribute("marker-end"); + if (val) { + sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val); + } + } + + /* stroke-opacity */ + if (!style->stroke_opacity.set) { + val = repr->attribute("stroke-opacity"); + if (val) { + sp_style_read_iscale24(&style->stroke_opacity, val); + } + } + if (!style->stroke_dasharray_set) { + val = repr->attribute("stroke-dasharray"); + if (val) { + sp_style_read_dash(style, val); + } + } + if (!style->stroke_dashoffset_set) { + /* fixme */ + val = repr->attribute("stroke-dashoffset"); + if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) { + style->stroke_dashoffset_set = TRUE; + } else { + style->stroke_dashoffset_set = FALSE; + } + } + + /* font-family */ + if (!style->text_private || !style->text->font_family.set) { + val = repr->attribute("font-family"); + if (val) { + if (!style->text_private) sp_style_privatize_text(style); + sp_style_read_istring(&style->text->font_family, val); + css2_unescape_unquote(&style->text->font_family); + } + } + + /* 3. Merge from parent */ + if (object) { + if (object->parent) { + sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent)); + } + } else { + if (sp_repr_parent(repr)) { + /// \todo fixme: This is not the prettiest thing (Lauris) + SPStyle *parent = sp_style_new(); + sp_style_read(parent, NULL, sp_repr_parent(repr)); + sp_style_merge_from_parent(style, parent); + sp_style_unref(parent); + } + } +} + + +/** + * Read style properties from object's repr. + * + * 1. Reset existing object style + * 2. Load current effective object style + * 3. Load i attributes from immediate parent (which has to be up-to-date) + */ +void +sp_style_read_from_object(SPStyle *style, SPObject *object) +{ + g_return_if_fail(style != NULL); + g_return_if_fail(object != NULL); + g_return_if_fail(SP_IS_OBJECT(object)); + + Inkscape::XML::Node *repr = SP_OBJECT_REPR(object); + g_return_if_fail(repr != NULL); + + sp_style_read(style, object, repr); +} + + +/** + * Read style properties from repr only. + */ +void +sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr) +{ + g_return_if_fail(style != NULL); + g_return_if_fail(repr != NULL); + + sp_style_read(style, NULL, repr); +} + + + +/** + * + */ +static void +sp_style_privatize_text(SPStyle *style) +{ + SPTextStyle *text = style->text; + style->text = sp_text_style_duplicate_unset(style->text); + sp_text_style_unref(text); + style->text_private = TRUE; +} + + +/** + * Merge property into style. + * + * Should be called in order of highest to lowest precedence. + * E.g. for a single style string, call from the last declaration to the first, + * as CSS says that later declarations override earlier ones. + * + * \pre val != NULL. + */ +static void +sp_style_merge_property(SPStyle *style, gint id, gchar const *val) +{ + g_return_if_fail(val != NULL); + + switch (id) { + /* CSS2 */ + /* Font */ + case SP_PROP_FONT_FAMILY: + if (!style->text_private) sp_style_privatize_text(style); + if (!style->text->font_family.set) { + sp_style_read_istring(&style->text->font_family, val); + css2_unescape_unquote (&style->text->font_family); + } + break; + case SP_PROP_FONT_SIZE: + SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val); + break; + case SP_PROP_FONT_SIZE_ADJUST: + if (strcmp(val, "none") != 0) { + g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val); + } + break; + case SP_PROP_FONT_STYLE: + SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true); + break; + case SP_PROP_FONT_VARIANT: + SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true); + break; + case SP_PROP_FONT_WEIGHT: + SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true); + break; + case SP_PROP_FONT_STRETCH: + SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true); + break; + case SP_PROP_FONT: + if (!style->text_private) sp_style_privatize_text(style); + if (!style->text->font.set) { + g_free(style->text->font.value); + style->text->font.value = g_strdup(val); + style->text->font.set = TRUE; + style->text->font.inherit = (val && !strcmp(val, "inherit")); + } + break; + /* Text */ + case SP_PROP_TEXT_INDENT: + SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val); + break; + case SP_PROP_TEXT_ALIGN: + SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true); + break; + case SP_PROP_TEXT_DECORATION: + if (!style->text_decoration.set) { + sp_style_read_itextdecoration(&style->text_decoration, val); + } + break; + case SP_PROP_LINE_HEIGHT: + if (!style->line_height.set) { + sp_style_read_ilengthornormal(&style->line_height, val); + } + break; + case SP_PROP_LETTER_SPACING: + if (!style->letter_spacing.set) { + sp_style_read_ilengthornormal(&style->letter_spacing, val); + } + break; + case SP_PROP_WORD_SPACING: + if (!style->word_spacing.set) { + sp_style_read_ilengthornormal(&style->word_spacing, val); + } + break; + case SP_PROP_TEXT_TRANSFORM: + SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true); + break; + /* Text (css3) */ + case SP_PROP_DIRECTION: + SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true); + break; + case SP_PROP_BLOCK_PROGRESSION: + SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true); + break; + case SP_PROP_WRITING_MODE: + SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true); + break; + case SP_PROP_TEXT_ANCHOR: + SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true); + break; + /* Text (unimplemented) */ + case SP_PROP_TEXT_RENDERING: { + /* Ignore the hint. */ + SPIEnum dummy; + SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true); + break; + } + case SP_PROP_ALIGNMENT_BASELINE: + g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val); + break; + case SP_PROP_BASELINE_SHIFT: + g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val); + break; + case SP_PROP_DOMINANT_BASELINE: + g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val); + break; + case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL: + g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val); + break; + case SP_PROP_GLYPH_ORIENTATION_VERTICAL: + g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val); + break; + case SP_PROP_KERNING: + g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val); + break; + /* Misc */ + case SP_PROP_CLIP: + g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val); + break; + case SP_PROP_COLOR: + if (!style->color.set) { + sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL); + } + break; + case SP_PROP_CURSOR: + g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val); + break; + case SP_PROP_DISPLAY: + SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true); + break; + case SP_PROP_OVERFLOW: + /** \todo + * FIXME: not supported properly yet, we just read and write it, + * but act as if it is always "display". + */ + SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true); + break; + case SP_PROP_VISIBILITY: + SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true); + break; + /* SVG */ + /* Clip/Mask */ + case SP_PROP_CLIP_PATH: + g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val); + break; + case SP_PROP_CLIP_RULE: + g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val); + break; + case SP_PROP_MASK: + g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val); + break; + case SP_PROP_OPACITY: + if (!style->opacity.set) { + sp_style_read_iscale24(&style->opacity, val); + } + break; + /* Filter */ + case SP_PROP_ENABLE_BACKGROUND: + g_warning("Unimplemented style property SP_PROP_ENABLE_BACKGROUND: value: %s", val); + break; + case SP_PROP_FILTER: + g_warning("Unimplemented style property SP_PROP_FILTER: value: %s", val); + break; + case SP_PROP_FLOOD_COLOR: + g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val); + break; + case SP_PROP_FLOOD_OPACITY: + g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val); + break; + case SP_PROP_LIGHTING_COLOR: + g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val); + break; + /* Gradient */ + case SP_PROP_STOP_COLOR: + g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val); + break; + case SP_PROP_STOP_OPACITY: + g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val); + break; + /* Interactivity */ + case SP_PROP_POINTER_EVENTS: + g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val); + break; + /* Paint */ + case SP_PROP_COLOR_INTERPOLATION: + g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val); + break; + case SP_PROP_COLOR_INTERPOLATION_FILTERS: + g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val); + break; + case SP_PROP_COLOR_PROFILE: + g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val); + break; + case SP_PROP_COLOR_RENDERING: { + /* Ignore the hint. */ + SPIEnum dummy; + SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true); + break; + } + case SP_PROP_FILL: + if (!style->fill.set) { + sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL); + } + break; + case SP_PROP_FILL_OPACITY: + if (!style->fill_opacity.set) { + sp_style_read_iscale24(&style->fill_opacity, val); + } + break; + case SP_PROP_FILL_RULE: + if (!style->fill_rule.set) { + sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true); + } + break; + case SP_PROP_IMAGE_RENDERING: { + /* Ignore the hint. */ + SPIEnum dummy; + SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true); + break; + } + case SP_PROP_MARKER: + /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */ + /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */ + marker_status("Setting SP_PROP_MARKER"); + if (!style->marker[SP_MARKER_LOC].set) { + g_free(style->marker[SP_MARKER_LOC].value); + style->marker[SP_MARKER_LOC].value = g_strdup(val); + style->marker[SP_MARKER_LOC].set = TRUE; + style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit")); + } + break; + + case SP_PROP_MARKER_START: + /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */ + marker_status("Setting SP_PROP_MARKER_START"); + if (!style->marker[SP_MARKER_LOC_START].set) { + g_free(style->marker[SP_MARKER_LOC_START].value); + style->marker[SP_MARKER_LOC_START].value = g_strdup(val); + style->marker[SP_MARKER_LOC_START].set = TRUE; + style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit")); + } + break; + case SP_PROP_MARKER_MID: + /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */ + marker_status("Setting SP_PROP_MARKER_MID"); + if (!style->marker[SP_MARKER_LOC_MID].set) { + g_free(style->marker[SP_MARKER_LOC_MID].value); + style->marker[SP_MARKER_LOC_MID].value = g_strdup(val); + style->marker[SP_MARKER_LOC_MID].set = TRUE; + style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit")); + } + break; + case SP_PROP_MARKER_END: + /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */ + marker_status("Setting SP_PROP_MARKER_END"); + if (!style->marker[SP_MARKER_LOC_END].set) { + g_free(style->marker[SP_MARKER_LOC_END].value); + style->marker[SP_MARKER_LOC_END].value = g_strdup(val); + style->marker[SP_MARKER_LOC_END].set = TRUE; + style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit")); + } + break; + + case SP_PROP_SHAPE_RENDERING: { + /* Ignore the hint. */ + SPIEnum dummy; + SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true); + break; + } + + case SP_PROP_STROKE: + if (!style->stroke.set) { + sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL); + } + break; + case SP_PROP_STROKE_WIDTH: + SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val); + break; + case SP_PROP_STROKE_DASHARRAY: + if (!style->stroke_dasharray_set) { + sp_style_read_dash(style, val); + } + break; + case SP_PROP_STROKE_DASHOFFSET: + if (!style->stroke_dashoffset_set) { + /* fixme */ + if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) { + style->stroke_dashoffset_set = TRUE; + } else { + style->stroke_dashoffset_set = FALSE; + } + } + break; + case SP_PROP_STROKE_LINECAP: + if (!style->stroke_linecap.set) { + sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true); + } + break; + case SP_PROP_STROKE_LINEJOIN: + if (!style->stroke_linejoin.set) { + sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true); + } + break; + case SP_PROP_STROKE_MITERLIMIT: + if (!style->stroke_miterlimit.set) { + sp_style_read_ifloat(&style->stroke_miterlimit, val); + } + break; + case SP_PROP_STROKE_OPACITY: + if (!style->stroke_opacity.set) { + sp_style_read_iscale24(&style->stroke_opacity, val); + } + break; + + default: + g_warning("Invalid style property id: %d value: %s", id, val); + break; + } +} + +static void +sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl) +{ + /** \todo Ensure that property is lcased, as per + * http://www.w3.org/TR/REC-CSS2/syndata.html#q4. + * Should probably be done in libcroco. + */ + unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str); + if (prop_idx != SP_ATTR_INVALID) { + /** \todo + * effic: Test whether the property is already set before trying to + * convert to string. Alternatively, set from CRTerm directly rather + * than converting to string. + */ + guchar *const str_value_unsigned = cr_term_to_string(decl->value); + gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned); + sp_style_merge_property(style, prop_idx, str_value); + g_free(str_value); + } +} + +static void +sp_style_merge_from_props(SPStyle *const style, CRPropList *const props) +{ +#if 0 /* forwards */ + for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) { + CRDeclaration *decl = NULL; + cr_prop_list_get_decl(cur, &decl); + sp_style_merge_style_from_decl(style, decl); + } +#else /* in reverse order, as we need later declarations to take precedence over earlier ones. */ + if (props) { + sp_style_merge_from_props(style, cr_prop_list_get_next(props)); + CRDeclaration *decl = NULL; + cr_prop_list_get_decl(props, &decl); + sp_style_merge_style_from_decl(style, decl); + } +#endif +} + +/** + * \pre decl_list != NULL + */ +static void +sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list) +{ + if (decl_list->next) { + sp_style_merge_from_decl_list(style, decl_list->next); + } + sp_style_merge_style_from_decl(style, decl_list); +} + +static CRSelEng * +sp_repr_sel_eng() +{ + CRSelEng *const ret = cr_sel_eng_new(); + cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface); + + /** \todo + * Check whether we need to register any pseudo-class handlers. + * libcroco has its own default handlers for first-child and lang. + * + * We probably want handlers for link and arguably visited (though + * inkscape can't visit links at the time of writing). hover etc. + * more useful in inkview than the editor inkscape. + * + * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that + * the following should be honoured, at least by inkview: + * :hover, :active, :focus, :visited, :link. + */ + + g_assert(ret); + return ret; +} + +static void +sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object) +{ + static CRSelEng *sel_eng = NULL; + if (!sel_eng) { + sel_eng = sp_repr_sel_eng(); + } + + CRPropList *props = NULL; + CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng, + object->document->style_cascade, + object->repr, + &props); + g_return_if_fail(status == CR_OK); + /// \todo Check what errors can occur, and handle them properly. + if (props) { + sp_style_merge_from_props(style, props); + cr_prop_list_destroy(props); + } +} + +/** + * Parses a style="..." string and merges it with an existing SPStyle. + */ +void +sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p) +{ + /* + * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute: + * ``When CSS styling is used, CSS inline style is specified by including + * semicolon-separated property declarations of the form "name : value" + * within the style attribute''. + * + * That's fairly ambiguous. Is a `value' allowed to contain semicolons? + * Why does it say "including", what else is allowed in the style + * attribute value? + */ + + CRDeclaration *const decl_list + = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8); + if (decl_list) { + sp_style_merge_from_decl_list(style, decl_list); + cr_declaration_destroy(decl_list); + } +} + +/** Indexed by SP_CSS_FONT_SIZE_blah. */ +static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0}; + +static void +sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent) +{ + /* 'font-size' */ + if (!child.set || child.inherit) { + /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */ + child.computed = parent.computed; + } else if (child.type == SP_FONT_SIZE_LITERAL) { + /** \todo + * fixme: SVG and CSS do not specify clearly, whether we should use + * user or screen coordinates (Lauris) + */ + if (child.value < SP_CSS_FONT_SIZE_SMALLER) { + child.computed = font_size_table[child.value]; + } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) { + child.computed = parent.computed / 1.2; + } else if (child.value == SP_CSS_FONT_SIZE_LARGER) { + child.computed = parent.computed * 1.2; + } else { + /* Illegal value */ + } + } else if (child.type == SP_FONT_SIZE_PERCENTAGE) { + /* Unlike most other lengths, percentage for font size is relative to parent computed value + * rather than viewport. */ + child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value); + } +} + +/** + * Sets computed values in \a style, which may involve inheriting from (or in some other way + * calculating from) corresponding computed values of \a parent. + * + * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default. + * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to + * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise + * about what the computed value is (not obvious for lengths). + * + * \pre \a parent's computed values are already up-to-date. + */ +void +sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent) +{ + g_return_if_fail(style != NULL); + + /** \todo + * fixme: Check for existing callers that might pass null parent. + * This should probably be g_return_if_fail, or else we should make a + * best attempt to set computed values correctly without having a parent + * (i.e., by assuming parent has initial values). + */ + if (!parent) + return; + + /* CSS2 */ + /* Font */ + sp_style_merge_font_size_from_parent(style->font_size, parent->font_size); + + /* 'font-style' */ + if (!style->font_style.set || style->font_style.inherit) { + style->font_style.computed = parent->font_style.computed; + } + + /* 'font-variant' */ + if (!style->font_variant.set || style->font_variant.inherit) { + style->font_variant.computed = parent->font_variant.computed; + } + + /* 'font-weight' */ + if (!style->font_weight.set || style->font_weight.inherit) { + style->font_weight.computed = parent->font_weight.computed; + } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) { + /** \todo + * fixme: This is unconditional, i.e., happens even if parent not + * present. + */ + style->font_weight.computed = SP_CSS_FONT_WEIGHT_400; + } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) { + style->font_weight.computed = SP_CSS_FONT_WEIGHT_700; + } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) { + unsigned const parent_val = parent->font_weight.computed; + g_assert(SP_CSS_FONT_WEIGHT_100 == 0); + // strictly, 'bolder' and 'lighter' should go to the next weight + // expressible in the current font family, but that's difficult to + // find out, so jumping by 3 seems an appropriate approximation + style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3 + ? (unsigned)SP_CSS_FONT_WEIGHT_100 + : parent_val - 3); + g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900); + } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) { + unsigned const parent_val = parent->font_weight.computed; + g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900); + style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3 + ? (unsigned)SP_CSS_FONT_WEIGHT_900 + : parent_val + 3); + g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900); + } + + /* 'font-stretch' */ + if (!style->font_stretch.set || style->font_stretch.inherit) { + style->font_stretch.computed = parent->font_stretch.computed; + } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) { + unsigned const parent_val = parent->font_stretch.computed; + style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED + ? parent_val + : parent_val - 1); + g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED); + } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) { + unsigned const parent_val = parent->font_stretch.computed; + g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED); + style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED + ? parent_val + : parent_val + 1); + g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED); + } + + /* text (css2) */ + if (!style->text_indent.set || style->text_indent.inherit) { + style->text_indent.computed = parent->text_indent.computed; + } + + if (!style->text_align.set || style->text_align.inherit) { + style->text_align.computed = parent->text_align.computed; + } + + if (!style->text_decoration.set || style->text_decoration.inherit) { + style->text_decoration.underline = parent->text_decoration.underline; + style->text_decoration.overline = parent->text_decoration.overline; + style->text_decoration.line_through = parent->text_decoration.line_through; + style->text_decoration.blink = parent->text_decoration.blink; + } + + if (!style->line_height.set || style->line_height.inherit) { + style->line_height.computed = parent->line_height.computed; + style->line_height.normal = parent->line_height.normal; + } + + if (!style->letter_spacing.set || style->letter_spacing.inherit) { + style->letter_spacing.computed = parent->letter_spacing.computed; + style->letter_spacing.normal = parent->letter_spacing.normal; + } + + if (!style->word_spacing.set || style->word_spacing.inherit) { + style->word_spacing.computed = parent->word_spacing.computed; + style->word_spacing.normal = parent->word_spacing.normal; + } + + if (!style->text_transform.set || style->text_transform.inherit) { + style->text_transform.computed = parent->text_transform.computed; + } + + if (!style->direction.set || style->direction.inherit) { + style->direction.computed = parent->direction.computed; + } + + if (!style->block_progression.set || style->block_progression.inherit) { + style->block_progression.computed = parent->block_progression.computed; + } + + if (!style->writing_mode.set || style->writing_mode.inherit) { + style->writing_mode.computed = parent->writing_mode.computed; + } + + if (!style->text_anchor.set || style->text_anchor.inherit) { + style->text_anchor.computed = parent->text_anchor.computed; + } + + if (style->opacity.inherit) { + style->opacity.value = parent->opacity.value; + } + + /* Color */ + if (!style->color.set || style->color.inherit) { + sp_style_merge_ipaint(style, &style->color, &parent->color); + } + + /* Fill */ + if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) { + sp_style_merge_ipaint(style, &style->fill, &parent->fill); + } + + if (!style->fill_opacity.set || style->fill_opacity.inherit) { + style->fill_opacity.value = parent->fill_opacity.value; + } + + if (!style->fill_rule.set || style->fill_rule.inherit) { + style->fill_rule.computed = parent->fill_rule.computed; + } + + /* Stroke */ + if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) { + sp_style_merge_ipaint(style, &style->stroke, &parent->stroke); + } + + if (!style->stroke_width.set || style->stroke_width.inherit) { + style->stroke_width.computed = parent->stroke_width.computed; + } else { + /* Update computed value for any change in font inherited from parent. */ + double const em = style->font_size.computed; + if (style->stroke_width.unit == SP_CSS_UNIT_EM) { + style->stroke_width.computed = style->stroke_width.value * em; + } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) { + double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango. + style->stroke_width.computed = style->stroke_width.value * ex; + } + } + + if (!style->stroke_linecap.set || style->stroke_linecap.inherit) { + style->stroke_linecap.computed = parent->stroke_linecap.computed; + } + + if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) { + style->stroke_linejoin.computed = parent->stroke_linejoin.computed; + } + + if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) { + style->stroke_miterlimit.value = parent->stroke_miterlimit.value; + } + + if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) { + /** \todo + * This code looks wrong. Why does the logic differ from the + * above properties? Similarly dashoffset below. + */ + style->stroke_dash.n_dash = parent->stroke_dash.n_dash; + if (style->stroke_dash.n_dash > 0) { + style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash); + memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble)); + } + } + + if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) { + style->stroke_dash.offset = parent->stroke_dash.offset; + } + + if (!style->stroke_opacity.set || style->stroke_opacity.inherit) { + style->stroke_opacity.value = parent->stroke_opacity.value; + } + + if (style->text && parent->text) { + if (!style->text->font_family.set || style->text->font_family.inherit) { + g_free(style->text->font_family.value); + style->text->font_family.value = g_strdup(parent->text->font_family.value); + } + } + + /* Markers - Free the old value and make copy of the new */ + for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) { + if (!style->marker[i].set || style->marker[i].inherit) { + g_free(style->marker[i].value); + style->marker[i].value = g_strdup(parent->marker[i].value); + } + } +} + +template <typename T> +static void +sp_style_merge_prop_from_dying_parent(T &child, T const &parent) +{ + if ( ( !(child.set) || child.inherit ) + && parent.set && !(parent.inherit) ) + { + child = parent; + } +} + +/** + * Copy SPIString from parent to child. + */ +static void +sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent) +{ + if ( ( !(child.set) || child.inherit ) + && parent.set && !(parent.inherit) ) + { + g_free(child.value); + child.value = g_strdup(parent.value); + child.set = parent.set; + child.inherit = parent.inherit; + } +} + +static void +sp_style_merge_paint_prop_from_dying_parent(SPStyle *style, + SPIPaint &child, SPIPaint const &parent) +{ + /** \todo + * I haven't given this much attention. See comments below about + * currentColor, colorProfile, and relative URIs. + */ + if (!child.set || child.inherit || child.currentcolor) { + sp_style_merge_ipaint(style, &child, &parent); + child.set = parent.set; + child.inherit = parent.inherit; + } +} + +static void +sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent, + unsigned const max_computed_val, + unsigned const smaller_val) +{ + /* We assume that min computed val is 0, contiguous up to max_computed_val, + then zero or more other absolute values, then smaller_val then larger_val. */ + unsigned const min_computed_val = 0; + unsigned const larger_val = smaller_val + 1; + g_return_if_fail(min_computed_val < max_computed_val); + g_return_if_fail(max_computed_val < smaller_val); + + if (parent.set && !parent.inherit) { + if (!child.set || child.inherit) { + child.value = parent.value; + child.set = parent.set; // i.e. true + child.inherit = parent.inherit; // i.e. false + } else if (child.value < smaller_val) { + /* Child has absolute value: leave as is. */ + } else if ( ( child.value == smaller_val + && parent.value == larger_val ) + || ( parent.value == smaller_val + && child.value == larger_val ) ) + { + child.set = false; + /* + * Note that this can result in a change in computed value in the + * rare case that the parent's setting was a no-op (i.e. if the + * parent's parent's computed value was already ultra-condensed or + * ultra-expanded). However, I'd guess that the change is for the + * better: I'd guess that if the properties were specified + * relatively, then the intent is to counteract parent's effect. + * I.e. I believe this is the best code even in that case. + */ + } else if (child.value == parent.value) { + /* Leave as is. */ + /** \todo + * It's unclear what to do if style and parent specify the same + * relative directive (narrower or wider). We can either convert + * to absolute specification or coalesce to a single relative + * request (of half the strength of the original pair). + * + * Converting to a single level of relative specification is a + * better choice if the newly-unlinked clone is itself cloned to + * other contexts (inheriting different font stretchiness): it + * would preserve the effect that it will be narrower than + * the inherited context in each case. The disadvantage is that + * it will ~certainly affect the computed value of the + * newly-unlinked clone. + */ + } else { + unsigned const parent_val = parent.computed; + child.value = ( child.value == smaller_val + ? ( parent_val == min_computed_val + ? parent_val + : parent_val - 1 ) + : ( parent_val == max_computed_val + ? parent_val + : parent_val + 1 ) ); + g_assert(child.value <= max_computed_val); + child.inherit = false; + g_assert(child.set); + } + } +} + +template <typename LengthT> +static void +sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent, + double const parent_child_em_ratio) +{ + if ( ( !(child.set) || child.inherit ) + && parent.set && !(parent.inherit) ) + { + child = parent; + switch (parent.unit) { + case SP_CSS_UNIT_EM: + case SP_CSS_UNIT_EX: + child.value *= parent_child_em_ratio; + /** \todo + * fixme: Have separate ex ratio parameter. + * Get x height from libnrtype or pango. + */ + if (!isFinite(child.value)) { + child.value = child.computed; + child.unit = SP_CSS_UNIT_NONE; + } + break; + + default: + break; + } + } +} + +static double +get_relative_font_size_frac(SPIFontSize const &font_size) +{ + switch (font_size.type) { + case SP_FONT_SIZE_LITERAL: { + switch (font_size.value) { + case SP_CSS_FONT_SIZE_SMALLER: + return 5.0 / 6.0; + + case SP_CSS_FONT_SIZE_LARGER: + return 6.0 / 5.0; + + default: + g_assert_not_reached(); + } + } + + case SP_FONT_SIZE_PERCENTAGE: + return SP_F8_16_TO_FLOAT(font_size.value); + + case SP_FONT_SIZE_LENGTH: + g_assert_not_reached(); + } + g_assert_not_reached(); +} + +/** + * Combine \a style and \a parent style specifications into a single style specification that + * preserves (as much as possible) the effect of the existing \a style being a child of \a parent. + * + * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being + * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent, + * trying to retain the same visual appearance once the parent is removed. Interesting cases are + * when there is unusual interaction with the parent's value (opacity, display) or when the value + * can be specified as relative to the parent computed value (font-size, font-weight etc.). + * + * Doesn't update computed values of \a style. For correctness, you should subsequently call + * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a + * style was previously up-to-date wrt \a parent. + * + * \pre \a parent's computed values are already up-to-date. + * (\a style's computed values needn't be up-to-date.) + */ +void +sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent) +{ + /** \note + * The general rule for each property is as follows: + * + * If style is set to an absolute value, then leave it as is. + * + * Otherwise (i.e. if style has a relative value): + * + * If parent is set to an absolute value, then set style to the computed value. + * + * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages). + */ + + /* We do font-size first, to ensure that em size is up-to-date. */ + /** \todo + * fixme: We'll need to have more font-related things up the top once + * we're getting x-height from pango or libnrtype. + */ + + /* Some things that allow relative specifications. */ + { + /* font-size. Note that we update the computed font-size of style, + to assist in em calculations later in this function. */ + if (parent->font_size.set && !parent->font_size.inherit) { + if (!style->font_size.set || style->font_size.inherit) { + /* font_size inherits the computed value, so we can use the parent value + * verbatim. */ + style->font_size = parent->font_size; + } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) { + /* Child already has absolute size (stored in computed value), so do nothing. */ + } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL + && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) { + /* Child already has absolute size, but we ensure that the computed value + is up-to-date. */ + unsigned const ix = style->font_size.value; + g_assert(ix < G_N_ELEMENTS(font_size_table)); + style->font_size.computed = font_size_table[ix]; + } else { + /* Child has relative size. */ + double const child_frac(get_relative_font_size_frac(style->font_size)); + style->font_size.set = true; + style->font_size.inherit = false; + style->font_size.computed = parent->font_size.computed * child_frac; + + if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL + && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) + || parent->font_size.type == SP_FONT_SIZE_LENGTH ) + { + /* Absolute value. */ + style->font_size.type = SP_FONT_SIZE_LENGTH; + /* .value is unused for SP_FONT_SIZE_LENGTH. */ + } else { + /* Relative value. */ + double const parent_frac(get_relative_font_size_frac(parent->font_size)); + style->font_size.type = SP_FONT_SIZE_PERCENTAGE; + style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac); + } + } + } + + /* 'font-stretch' */ + sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch, + parent->font_stretch, + SP_CSS_FONT_STRETCH_ULTRA_EXPANDED, + SP_CSS_FONT_STRETCH_NARROWER); + + /* font-weight */ + sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight, + parent->font_weight, + SP_CSS_FONT_WEIGHT_900, + SP_CSS_FONT_WEIGHT_LIGHTER); + } + + + /* Enum values that don't have any relative settings (other than `inherit'). */ + { + SPIEnum SPStyle::*const fields[] = { + //nyi: SPStyle::clip_rule, + //nyi: SPStyle::color_interpolation, + //nyi: SPStyle::color_interpolation_filters, + //nyi: SPStyle::color_rendering, + &SPStyle::direction, + &SPStyle::fill_rule, + &SPStyle::font_style, + &SPStyle::font_variant, + //nyi: SPStyle::image_rendering, + //nyi: SPStyle::pointer_events, + //nyi: SPStyle::shape_rendering, + &SPStyle::stroke_linecap, + &SPStyle::stroke_linejoin, + &SPStyle::text_anchor, + //nyi: &SPStyle::text_rendering, + &SPStyle::visibility, + &SPStyle::writing_mode + }; + + for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) { + SPIEnum SPStyle::*const fld = fields[i]; + sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld); + } + } + + /* A few other simple inheritance properties. */ + { + sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity); + sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity); + sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit); + + /** \todo + * We currently treat text-decoration as if it were a simple inherited + * property (fixme). This code may need changing once we do the + * special fill/stroke inheritance mentioned by the spec. + */ + sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration, + parent->text_decoration); + + //nyi: font-size-adjust, // <number> | none | inherit + //nyi: glyph-orientation-horizontal, + //nyi: glyph-orientation-vertical, + } + + /* Properties that involve length but are easy in other respects. */ + { + /* The difficulty with lengths is that font-relative units need adjusting if the font + * varies between parent & child. + * + * Lengths specified in the existing child can stay as they are: its computed font + * specification should stay unchanged, so em & ex lengths should continue to mean the same + * size. + * + * Lengths specified in the dying parent in em or ex need to be scaled according to the + * ratio of em or ex size between parent & child. + */ + double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed; + + SPILength SPStyle::*const lfields[] = { + &SPStyle::stroke_width, + &SPStyle::text_indent + }; + for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) { + SPILength SPStyle::*fld = lfields[i]; + sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld, + parent->*fld, + parent_child_em_ratio); + } + + SPILengthOrNormal SPStyle::*const nfields[] = { + &SPStyle::letter_spacing, + &SPStyle::line_height, + &SPStyle::word_spacing + }; + for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) { + SPILengthOrNormal SPStyle::*fld = nfields[i]; + sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld, + parent->*fld, + parent_child_em_ratio); + } + + //nyi: &SPStyle::kerning: length or `auto' + + /* fixme: Move stroke-dash and stroke-dash-offset here once they + can accept units. */ + } + + /* Properties that involve a URI but are easy in other respects. */ + { + /** \todo + * Could cause problems if original object was in another document + * and it used a relative URL. (At the time of writing, we don't + * allow hrefs to other documents, so this isn't a problem yet.) + * Paint properties also allow URIs. + */ + //nyi: cursor, // may involve change in effect, but we can't do much better + //nyi: color-profile, + + // Markers (marker-start, marker-mid, marker-end). + for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) { + sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]); + } + } + + /* CSS2 */ + /* Font */ + + if (style->text && parent->text) { + sp_style_merge_string_prop_from_dying_parent(style->text->font_family, + parent->text->font_family); + } + + /* Properties that don't inherit by default. Most of these need special handling. */ + { + /* + * opacity's effect is cumulative; we set the new value to the combined effect. The + * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and + * fill-opacity are quite different from opacity, and don't need any special handling.) + * + * Cases: + * - parent & child were each previously unset, in which case the effective + * opacity value is 1.0, and style should remain unset. + * - parent was previously unset (so computed opacity value of 1.0) + * and child was set to inherit. The merged child should + * get a value of 1.0, and shouldn't inherit (lest the new parent + * has a different opacity value). Given that opacity's default + * value is 1.0 (rather than inherit), we might as well have the + * merged child's opacity be unset. + * - parent was previously unset (so opacity 1.0), and child was set to a number. + * The merged child should retain its existing settings (though it doesn't matter + * if we make it unset if that number was 1.0). + * - parent was inherit and child was unset. Merged child should be set to inherit. + * - parent was inherit and child was inherit. (We can't in general reproduce this + * effect (short of introducing a new group), but setting opacity to inherit is rare.) + * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged + * child's value should be set to the product of the two, i.e. the square of the + * inherited value, and should not be marked as inherit. (This decision assumes that it + * is more important to retain the effective opacity than to retain the inheriting + * effect, and assumes that the inheriting effect either isn't important enough to create + * a group or isn't common enough to bother maintaining the code to create a group.) If + * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes + * closer to maintaining the effect. + * - parent was inherit and child was set to a numerical value. If the child's value + * was 1.0, then the merged child should have the same settings as the parent. + * If the child's value was 0, then the merged child should also be set to 0. + * If the child's value was anything else, then we do the same as for the inherit/inherit + * case above: have the merged child set to the product of the two opacities and not + * marked as inherit, for the same reasons as for that case. + * - parent was set to a value, and child was unset. The merged child should have + * parent's settings. + * - parent was set to a value, and child was inherit. The merged child should + * be set to the product, i.e. the square of the parent's value. + * - parent & child are each set to a value. The merged child should be set to the + * product. + */ + if ( !style->opacity.set + || ( !style->opacity.inherit + && style->opacity.value == SP_SCALE24_MAX ) ) + { + style->opacity = parent->opacity; + } else { + /* Ensure that style's computed value is up-to-date. */ + if (style->opacity.inherit) { + style->opacity.value = parent->opacity.value; + } + + /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */ + style->opacity.value = SP_SCALE24_MUL(style->opacity.value, + parent->opacity.value); + + style->opacity.inherit = (parent->opacity.inherit + && style->opacity.inherit + && (parent->opacity.value == 0 || + parent->opacity.value == SP_SCALE24_MAX)); + style->opacity.set = ( style->opacity.inherit + || style->opacity.value < SP_SCALE24_MAX ); + } + + /* display is in principle similar to opacity, but implementation is easier. */ + if ( parent->display.set && !parent->display.inherit + && parent->display.value == SP_CSS_DISPLAY_NONE ) { + style->display.value = SP_CSS_DISPLAY_NONE; + style->display.set = true; + style->display.inherit = false; + } else if (style->display.inherit) { + style->display.value = parent->display.value; + style->display.set = parent->display.set; + style->display.inherit = parent->display.inherit; + } else { + /* Leave as is. (display doesn't inherit by default.) */ + } + + /** \todo + * fixme: Check that we correctly handle all properties that don't + * inherit by default (as shown in + * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties). + */ + } + + /* SPIPaint properties (including color). */ + { + /** \todo + * Think about the issues involved if specified as currentColor or + * if specified relative to colorProfile, and if the currentColor or + * colorProfile differs between parent \& child. See also comments + * elsewhere in this function about URIs. + */ + SPIPaint SPStyle::*const fields[] = { + &SPStyle::color, + &SPStyle::fill, + &SPStyle::stroke + }; + for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) { + SPIPaint SPStyle::*const fld = fields[i]; + sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld); + } + } + + /* Things from SVG 1.2 or CSS3. */ + { + /* Note: If we ever support setting string values for text-align then we'd need strdup + * handling here. */ + sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align); + + sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform); + sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression); + } + + /* Note: this will need length handling once dasharray supports units. */ + if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit ) + && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit ) + { + style->stroke_dash.n_dash = parent->stroke_dash.n_dash; + if (style->stroke_dash.n_dash > 0) { + style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash); + memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble)); + } + style->stroke_dasharray_set = parent->stroke_dasharray_set; + style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit; + } + + /* Note: this will need length handling once dasharray_offset supports units. */ + if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) { + style->stroke_dash.offset = parent->stroke_dash.offset; + style->stroke_dashoffset_set = parent->stroke_dashoffset_set; + /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to + * represent it as a normal SPILength; though will need to do something about existing + * users of stroke_dash.offset and stroke_dashoffset_set. */ + } +} + + + +/** + * Disconnects from possible fill and stroke paint servers. + */ +static void +sp_style_paint_server_release(SPPaintServer *server, SPStyle *style) +{ + if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER) + && (server == style->fill.value.paint.server)) + { + sp_style_paint_clear(style, &style->fill, TRUE, FALSE); + } + + if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER) + && (server == style->stroke.value.paint.server)) + { + sp_style_paint_clear(style, &style->stroke, TRUE, FALSE); + } +} + + + + +/** + * Emit style modified signal on style's object if server is style's fill + * or stroke paint server. + */ +static void +sp_style_paint_server_modified(SPPaintServer *server, guint flags, SPStyle *style) +{ + if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER) + && (server == style->fill.value.paint.server)) + { + if (style->object) { + /** \todo + * fixme: I do not know, whether it is optimal - we are + * forcing reread of everything (Lauris) + */ + /** \todo + * fixme: We have to use object_modified flag, because parent + * flag is only available downstreams. + */ + style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG); + } + } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER) + && (server == style->stroke.value.paint.server)) + { + if (style->object) { + /// \todo fixme: + style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG); + } + } else { + g_assert_not_reached(); + } +} + + + +/** + * + */ +static void +sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent) +{ + sp_style_paint_clear(style, paint, TRUE, FALSE); + + if ((paint->set && paint->currentcolor) || parent->currentcolor) { + paint->currentcolor = TRUE; + paint->type = SP_PAINT_TYPE_COLOR; + sp_color_copy(&paint->value.color, &style->color.value.color); + return; + } + + paint->type = parent->type; + switch (paint->type) { + case SP_PAINT_TYPE_COLOR: + sp_color_copy(&paint->value.color, &parent->value.color); + break; + case SP_PAINT_TYPE_PAINTSERVER: + paint->value.paint.server = parent->value.paint.server; + paint->value.paint.uri = parent->value.paint.uri; + if (paint->value.paint.server) { + if (style->object && !style->cloned) { // href paintserver for style of non-clones only + sp_object_href(SP_OBJECT(paint->value.paint.server), style); + } + if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles) + g_signal_connect(G_OBJECT(paint->value.paint.server), "release", + G_CALLBACK(sp_style_paint_server_release), style); + g_signal_connect(G_OBJECT(paint->value.paint.server), "modified", + G_CALLBACK(sp_style_paint_server_modified), style); + } + } + break; + case SP_PAINT_TYPE_NONE: + break; + default: + g_assert_not_reached(); + break; + } +} + + +/** + * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or + * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's + * complete cascaded style to style_clipboard. When you need a CSS string + * for an object in the document tree, you normally call + * sp_style_write_difference instead to take into account the object's parent. + * + * \pre style != NULL. + * \pre flags in {IFSET, ALWAYS}. + * \post ret != NULL. + */ +gchar * +sp_style_write_string(SPStyle const *const style, guint const flags) +{ + /** \todo + * Merge with write_difference, much duplicate code! + */ + g_return_val_if_fail(style != NULL, NULL); + g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) || + (flags == SP_STYLE_FLAG_ALWAYS) ), + NULL); + + gchar c[BMAX]; + gchar *p = c; + *p = '\0'; + + p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags); + + /* Text */ + p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags); + p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags); + p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags); + p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags); + p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags); + + p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags); + + /// \todo fixme: Per type methods need default flag too (lauris) + p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags); + p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags); + p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags); + p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags); + p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags); + p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags); + + marker_status("sp_style_write_string: Writing markers"); + if (style->marker[SP_MARKER_LOC].set) { + p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value); + } else if (flags == SP_STYLE_FLAG_ALWAYS) { + p += g_snprintf(p, c + BMAX - p, "marker:none;"); + } + if (style->marker[SP_MARKER_LOC_START].set) { + p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value); + } else if (flags == SP_STYLE_FLAG_ALWAYS) { + p += g_snprintf(p, c + BMAX - p, "marker-start:none;"); + } + if (style->marker[SP_MARKER_LOC_MID].set) { + p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value); + } else if (flags == SP_STYLE_FLAG_ALWAYS) { + p += g_snprintf(p, c + BMAX - p, "marker-mid:none;"); + } + if (style->marker[SP_MARKER_LOC_END].set) { + p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value); + } else if (flags == SP_STYLE_FLAG_ALWAYS) { + p += g_snprintf(p, c + BMAX - p, "marker-end:none;"); + } + + p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags); + + /** \todo fixme: */ + if ((flags == SP_STYLE_FLAG_ALWAYS) + || style->stroke_dasharray_set) + { + if (style->stroke_dasharray_inherit) { + p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;"); + } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) { + p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:"); + gint i; + for (i = 0; i < style->stroke_dash.n_dash; i++) { + Inkscape::CSSOStringStream os; + if (i) { + os << ", "; + } + os << style->stroke_dash.dash[i]; + p += g_strlcpy(p, os.str().c_str(), c + BMAX - p); + } + if (p < c + BMAX) { + *p++ = ';'; + } + } else { + p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;"); + } + } + + /** \todo fixme: */ + if (style->stroke_dashoffset_set) { + Inkscape::CSSOStringStream os; + os << "stroke-dashoffset:" << style->stroke_dash.offset << ";"; + p += g_strlcpy(p, os.str().c_str(), c + BMAX - p); + } else if (flags == SP_STYLE_FLAG_ALWAYS) { + p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;"); + } + + p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags); + + p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags); + p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags); + + /* fixme: */ + p += sp_text_style_write(p, c + BMAX - p, style->text, flags); + + /* Get rid of trailing `;'. */ + if (p != c) { + --p; + if (*p == ';') { + *p = '\0'; + } + } + + return g_strdup(c); +} + + +#define STYLE_BUF_MAX + + +/** + * Dumps style to CSS string, see sp_style_write_string() + * + * \pre from != NULL. + * \pre to != NULL. + * \post ret != NULL. + */ +gchar * +sp_style_write_difference(SPStyle const *const from, SPStyle const *const to) +{ + g_return_val_if_fail(from != NULL, NULL); + g_return_val_if_fail(to != NULL, NULL); + + gchar c[BMAX], *p = c; + *p = '\0'; + + p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF); + + /* Text */ + p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF); + + p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF); + + /// \todo fixme: Per type methods need default flag too + if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) { + p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET); + } + p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET); + p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, + &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, + &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF); + p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", + &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF); + /** \todo fixme: */ + if (from->stroke_dasharray_set) { + if (from->stroke_dasharray_inherit) { + p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;"); + } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) { + p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:"); + for (gint i = 0; i < from->stroke_dash.n_dash; i++) { + Inkscape::CSSOStringStream os; + if (i) { + os << ", "; + } + os << from->stroke_dash.dash[i]; + p += g_strlcpy(p, os.str().c_str(), c + BMAX - p); + } + p += g_snprintf(p, c + BMAX - p, ";"); + } + } + /* fixme: */ + if (from->stroke_dashoffset_set) { + Inkscape::CSSOStringStream os; + os << "stroke-dashoffset:" << from->stroke_dash.offset << ";"; + p += g_strlcpy(p, os.str().c_str(), c + BMAX - p); + } + p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF); + + /* markers */ + marker_status("sp_style_write_difference: Writing markers"); + if (from->marker[SP_MARKER_LOC].value != NULL) { + p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value); + } + if (from->marker[SP_MARKER_LOC_START].value != NULL) { + p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value); + } + if (from->marker[SP_MARKER_LOC_MID].value != NULL) { + p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value); + } + if (from->marker[SP_MARKER_LOC_END].value != NULL) { + p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value); + } + + p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET); + p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET); + p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET); + + p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF); + + /** \todo + * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF + * flag is mainly only for attributes that don't handle explicit unset well. + * We may need to revisit the behaviour of this routine. + */ + + /* Get rid of trailing `;'. */ + if (p != c) { + --p; + if (*p == ';') { + *p = '\0'; + } + } + + return g_strdup(c); +} + + + +/** + * Reset all style properties. + */ +static void +sp_style_clear(SPStyle *style) +{ + g_return_if_fail(style != NULL); + + sp_style_paint_clear(style, &style->fill, TRUE, FALSE); + sp_style_paint_clear(style, &style->stroke, TRUE, FALSE); + if (style->stroke_dash.dash) { + g_free(style->stroke_dash.dash); + } + + /** \todo fixme: Do that text manipulation via parents */ + SPObject *object = style->object; + gint const refcount = style->refcount; + SPTextStyle *text = style->text; + unsigned const text_private = style->text_private; + memset(style, 0, sizeof(SPStyle)); + style->refcount = refcount; + style->object = object; + style->text = text; + style->text_private = text_private; + /* fixme: */ + style->text->font.set = FALSE; + style->text->font_family.set = FALSE; + + style->font_size.set = FALSE; + style->font_size.type = SP_FONT_SIZE_LITERAL; + style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM; + style->font_size.computed = 12.0; + style->font_style.set = FALSE; + style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL; + style->font_variant.set = FALSE; + style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL; + style->font_weight.set = FALSE; + style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL; + style->font_weight.computed = SP_CSS_FONT_WEIGHT_400; + style->font_stretch.set = FALSE; + style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL; + + /* text */ + style->text_indent.set = FALSE; + style->text_indent.unit = SP_CSS_UNIT_NONE; + style->text_indent.computed = 0.0; + + style->text_align.set = FALSE; + style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START; + + style->text_decoration.set = FALSE; + style->text_decoration.underline = FALSE; + style->text_decoration.overline = FALSE; + style->text_decoration.line_through = FALSE; + style->text_decoration.blink = FALSE; + + style->line_height.set = FALSE; + style->line_height.unit = SP_CSS_UNIT_PERCENT; + style->line_height.normal = TRUE; + style->line_height.value = style->line_height.computed = 1.0; + + style->letter_spacing.set = FALSE; + style->letter_spacing.unit = SP_CSS_UNIT_NONE; + style->letter_spacing.normal = TRUE; + style->letter_spacing.value = style->letter_spacing.computed = 0.0; + + style->word_spacing.set = FALSE; + style->word_spacing.unit = SP_CSS_UNIT_NONE; + style->word_spacing.normal = TRUE; + style->word_spacing.value = style->word_spacing.computed = 0.0; + + style->text_transform.set = FALSE; + style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE; + + style->direction.set = FALSE; + style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR; + + style->block_progression.set = FALSE; + style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB; + + style->writing_mode.set = FALSE; + style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB; + + + style->text_anchor.set = FALSE; + style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START; + + + style->opacity.value = SP_SCALE24_MAX; + style->visibility.set = FALSE; + style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE; + style->display.set = FALSE; + style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE; + style->overflow.set = FALSE; + style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE; + + style->color.type = SP_PAINT_TYPE_COLOR; + sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0); + + style->fill.type = SP_PAINT_TYPE_COLOR; + sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0); + style->fill_opacity.value = SP_SCALE24_MAX; + style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO; + + style->stroke.type = SP_PAINT_TYPE_NONE; + style->stroke.set = FALSE; + sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0); + style->stroke_opacity.value = SP_SCALE24_MAX; + + style->stroke_width.set = FALSE; + style->stroke_width.unit = SP_CSS_UNIT_NONE; + style->stroke_width.computed = 1.0; + + style->stroke_linecap.set = FALSE; + style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT; + style->stroke_linejoin.set = FALSE; + style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER; + + style->stroke_miterlimit.set = FALSE; + style->stroke_miterlimit.value = 4.0; + + style->stroke_dash.n_dash = 0; + style->stroke_dash.dash = NULL; + style->stroke_dash.offset = 0.0; + + for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) { + g_free(style->marker[i].value); + style->marker[i].set = FALSE; + } +} + + + +/** + * + */ +static void +sp_style_read_dash(SPStyle *style, gchar const *str) +{ + /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */ + style->stroke_dasharray_set = TRUE; + + if (strcmp(str, "inherit") == 0) { + style->stroke_dasharray_inherit = true; + return; + } + style->stroke_dasharray_inherit = false; + + NRVpathDash &dash = style->stroke_dash; + g_free(dash.dash); + dash.dash = NULL; + + if (strcmp(str, "none") == 0) { + dash.n_dash = 0; + return; + } + + gint n_dash = 0; + gdouble d[64]; + gchar *e = NULL; + + bool LineSolid=true; + while (e != str && n_dash < 64) { + /* TODO: Should allow <length> rather than just a unitless (px) number. */ + d[n_dash] = g_ascii_strtod(str, (char **) &e); + if (d[n_dash] > 0.00000001) + LineSolid = false; + if (e != str) { + n_dash += 1; + str = e; + } + while (str && *str && !isalnum(*str)) str += 1; + } + + if (LineSolid) { + dash.n_dash = 0; + return; + } + + if (n_dash > 0) { + dash.dash = g_new(gdouble, n_dash); + memcpy(dash.dash, d, sizeof(gdouble) * n_dash); + dash.n_dash = n_dash; + } +} + + +/*######################### +## SPTextStyle operations +#########################*/ + + +/** + * Return new SPTextStyle object with default settings. + */ +static SPTextStyle * +sp_text_style_new() +{ + SPTextStyle *ts = g_new0(SPTextStyle, 1); + ts->refcount = 1; + sp_text_style_clear(ts); + + ts->font.value = g_strdup("Bitstream Vera Sans"); + ts->font_family.value = g_strdup("Bitstream Vera Sans"); + + return ts; +} + + +/** + * Clear text style settings. + */ +static void +sp_text_style_clear(SPTextStyle *ts) +{ + ts->font.set = FALSE; + ts->font_family.set = FALSE; +} + + + +/** + * Reduce refcount of text style and possibly free it. + */ +static SPTextStyle * +sp_text_style_unref(SPTextStyle *st) +{ + st->refcount -= 1; + + if (st->refcount < 1) { + g_free(st->font.value); + g_free(st->font_family.value); + g_free(st); + } + + return NULL; +} + + + +/** + * Return duplicate of text style. + */ +static SPTextStyle * +sp_text_style_duplicate_unset(SPTextStyle *st) +{ + SPTextStyle *nt = g_new0(SPTextStyle, 1); + nt->refcount = 1; + + nt->font.value = g_strdup(st->font.value); + nt->font_family.value = g_strdup(st->font_family.value); + + return nt; +} + + + +/** + * Write SPTextStyle object into string. + */ +static guint +sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags) +{ + gint d = 0; + + // We do not do diffing for text style + if (flags == SP_STYLE_FLAG_IFDIFF) + flags = SP_STYLE_FLAG_IFSET; + + d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags); + return d; +} + + + +/* The following sp_tyle_read_* functions ignore invalid values, as per + * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors. + * + * [However, the SVG spec is somewhat unclear as to whether the style attribute should + * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE + * pairs, in which case SVG's error-handling rules + * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.] + */ + + +/** + * Set SPIFloat object from string. + */ +static void +sp_style_read_ifloat(SPIFloat *val, gchar const *str) +{ + if (!strcmp(str, "inherit")) { + val->set = TRUE; + val->inherit = TRUE; + } else { + gfloat value; + if (sp_svg_number_read_f(str, &value)) { + val->set = TRUE; + val->inherit = FALSE; + val->value = value; + } + } +} + + + +/** + * Set SPIScale24 object from string. + */ +static void +sp_style_read_iscale24(SPIScale24 *val, gchar const *str) +{ + if (!strcmp(str, "inherit")) { + val->set = TRUE; + val->inherit = TRUE; + } else { + gfloat value; + if (sp_svg_number_read_f(str, &value)) { + val->set = TRUE; + val->inherit = FALSE; + value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX); + val->value = SP_SCALE24_FROM_FLOAT(value); + } + } +} + +/** + * Reads a style value and performs lookup based on the given style value enumerations. + */ +static void +sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, + bool const can_explicitly_inherit) +{ + if ( can_explicitly_inherit && !strcmp(str, "inherit") ) { + val->set = TRUE; + val->inherit = TRUE; + } else { + for (unsigned i = 0; dict[i].key; i++) { + if (!strcmp(str, dict[i].key)) { + val->set = TRUE; + val->inherit = FALSE; + val->value = dict[i].value; + /* Save copying for values not needing it */ + val->computed = val->value; + break; + } + } + } +} + + + +/** + * Set SPIString object from string. + */ +static void +sp_style_read_istring(SPIString *val, gchar const *str) +{ + g_free(val->value); + + if (!strcmp(str, "inherit")) { + val->set = TRUE; + val->inherit = TRUE; + val->value = NULL; + } else { + val->set = TRUE; + val->inherit = FALSE; + val->value = g_strdup(str); + } +} + + + +/** + * Set SPILength object from string. + */ +static void +sp_style_read_ilength(SPILength *val, gchar const *str) +{ + if (!strcmp(str, "inherit")) { + val->set = TRUE; + val->inherit = TRUE; + } else { + gdouble value; + gchar *e; + /** \todo fixme: Move this to standard place (Lauris) */ + value = g_ascii_strtod(str, &e); + if ((gchar const *) e != str) { + /** \todo + * Allow the number of px per inch to vary (document preferences, + * X server or whatever). E.g. don't fill in computed here, do + * it at the same time as percentage units are done. + */ + if (!*e) { + /* Userspace */ + val->unit = SP_CSS_UNIT_NONE; + val->computed = value; + } else if (!strcmp(e, "px")) { + /* Userspace */ + val->unit = SP_CSS_UNIT_PX; + val->computed = value; + } else if (!strcmp(e, "pt")) { + /* Userspace / DEVICESCALE */ + val->unit = SP_CSS_UNIT_PT; + val->computed = value * PX_PER_PT; + } else if (!strcmp(e, "pc")) { + /* 1 pica = 12pt; FIXME: add it to SPUnit */ + val->unit = SP_CSS_UNIT_PC; + val->computed = value * PX_PER_PT * 12; + } else if (!strcmp(e, "mm")) { + val->unit = SP_CSS_UNIT_MM; + val->computed = value * PX_PER_MM; + } else if (!strcmp(e, "cm")) { + val->unit = SP_CSS_UNIT_CM; + val->computed = value * PX_PER_CM; + } else if (!strcmp(e, "in")) { + val->unit = SP_CSS_UNIT_IN; + val->computed = value * PX_PER_IN; + } else if (!strcmp(e, "em")) { + /* EM square */ + val->unit = SP_CSS_UNIT_EM; + val->value = value; + } else if (!strcmp(e, "ex")) { + /* ex square */ + val->unit = SP_CSS_UNIT_EX; + val->value = value; + } else if (!strcmp(e, "%")) { + /* Percentage */ + val->unit = SP_CSS_UNIT_PERCENT; + val->value = value * 0.01; + } else { + /* Invalid */ + return; + } + val->set = TRUE; + val->inherit = FALSE; + } + } +} + +/** + * Set SPILengthOrNormal object from string. + */ +static void +sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str) +{ + if (!strcmp(str, "normal")) { + val->set = TRUE; + val->inherit = FALSE; + val->normal = TRUE; + val->unit = SP_CSS_UNIT_NONE; + val->value = val->computed = 0.0; + } else { + SPILength length; + sp_style_read_ilength(&length, str); + val->set = length.set; + val->inherit = length.inherit; + val->normal = FALSE; + val->unit = length.unit; + val->value = length.value; + val->computed = length.computed; + } +} + +/** + * Set SPITextDecoration object from string. + */ +static void +sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str) +{ + if (!strcmp(str, "inherit")) { + val->set = TRUE; + val->inherit = TRUE; + } else if (!strcmp(str, "none")) { + val->set = TRUE; + val->inherit = FALSE; + val->underline = FALSE; + val->overline = FALSE; + val->line_through = FALSE; + val->blink = FALSE; + } else { + bool found_underline = false; + bool found_overline = false; + bool found_line_through = false; + bool found_blink = false; + for ( ; *str ; str++ ) { + if (*str == ' ') continue; + if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) { + found_underline = true; + str += 9; + } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) { + found_overline = true; + str += 8; + } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) { + found_line_through = true; + str += 12; + } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) { + found_blink = true; + str += 5; + } else { + return; // invalid value + } + } + if (!(found_underline || found_overline || found_line_through || found_blink)) { + return; // invalid value: empty + } + val->set = TRUE; + val->inherit = FALSE; + val->underline = found_underline; + val->overline = found_overline; + val->line_through = found_line_through; + val->blink = found_blink; + } +} + +/** + * Set SPIPaint object from string containing an integer value. + * \param document Ignored + */ +static void +sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document) +{ + paint->currentcolor = FALSE; /* currentColor not a valid <color>. */ + if (!strcmp(str, "inherit")) { + paint->set = TRUE; + paint->inherit = TRUE; + } else { + guint32 const rgb0 = sp_svg_read_color(str, 0xff); + if (rgb0 != 0xff) { + paint->type = SP_PAINT_TYPE_COLOR; + sp_color_set_rgb_rgba32(&paint->value.color, rgb0); + paint->set = TRUE; + paint->inherit = FALSE; + } + } +} + + +/** + * Set SPIPaint object from string. + */ +static void +sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document) +{ + while (isspace(*str)) { + ++str; + } + + if (streq(str, "inherit")) { + paint->set = TRUE; + paint->inherit = TRUE; + paint->currentcolor = FALSE; + } else if (streq(str, "currentColor")) { + paint->set = TRUE; + paint->inherit = FALSE; + paint->currentcolor = TRUE; + } else if (streq(str, "none")) { + paint->type = SP_PAINT_TYPE_NONE; + paint->set = TRUE; + paint->inherit = FALSE; + paint->currentcolor = FALSE; + } else if (strneq(str, "url", 3)) { + // this is alloc'd uri, but seems to be shared with a parent + // potentially, so it's not any easy g_free case... + paint->value.paint.uri = extract_uri(str); + if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') { + paint->type = SP_PAINT_TYPE_NONE; + return; + } + paint->type = SP_PAINT_TYPE_PAINTSERVER; + paint->set = TRUE; + paint->inherit = FALSE; + paint->currentcolor = FALSE; + if (document) { + SPObject *ps = sp_uri_reference_resolve(document, str); + if (ps && SP_IS_PAINT_SERVER(ps)) { + paint->value.paint.server = SP_PAINT_SERVER(ps); + if (style->object && !style->cloned) { + sp_object_href(SP_OBJECT(paint->value.paint.server), style); + } + if (style->object || style->cloned) { + g_signal_connect(G_OBJECT(paint->value.paint.server), "release", + G_CALLBACK(sp_style_paint_server_release), style); + g_signal_connect(G_OBJECT(paint->value.paint.server), "modified", + G_CALLBACK(sp_style_paint_server_modified), style); + } + } else { + paint->value.paint.server = NULL; + } + } + } else { + guint32 const rgb0 = sp_svg_read_color(str, 0xff); + if (rgb0 != 0xff) { + paint->type = SP_PAINT_TYPE_COLOR; + sp_color_set_rgb_rgba32(&paint->value.color, rgb0); + paint->set = TRUE; + paint->inherit = FALSE; + paint->currentcolor = FALSE; + } + } +} + + + +/** + * Set SPIFontSize object from string. + */ +static void +sp_style_read_ifontsize(SPIFontSize *val, gchar const *str) +{ + if (!strcmp(str, "inherit")) { + val->set = TRUE; + val->inherit = TRUE; + } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) { + for (unsigned i = 0; enum_font_size[i].key; i++) { + if (!strcmp(str, enum_font_size[i].key)) { + val->set = TRUE; + val->inherit = FALSE; + val->type = SP_FONT_SIZE_LITERAL; + val->value = enum_font_size[i].value; + return; + } + } + /* Invalid */ + return; + } else { + gdouble value; + gchar *e; + /* fixme: Move this to standard place (Lauris) */ + value = g_ascii_strtod(str, &e); + if ((gchar const *) e != str) { + if (!*e) { + /* Userspace */ + } else if (!strcmp(e, "px")) { + /* Userspace */ + } else if (!strcmp(e, "pt")) { + /* Userspace * DEVICESCALE */ + value *= PX_PER_PT; + } else if (!strcmp(e, "pc")) { + /* 12pt */ + value *= PX_PER_PT * 12.0; + } else if (!strcmp(e, "mm")) { + value *= PX_PER_MM; + } else if (!strcmp(e, "cm")) { + value *= PX_PER_CM; + } else if (!strcmp(e, "in")) { + value *= PX_PER_IN; + } else if (!strcmp(e, "%")) { + /* Percentage */ + val->set = TRUE; + val->inherit = FALSE; + val->type = SP_FONT_SIZE_PERCENTAGE; + val->value = SP_F8_16_FROM_FLOAT(value / 100.0); + return; + } else { + /* Invalid */ + return; + } + /* Length */ + val->set = TRUE; + val->inherit = FALSE; + val->type = SP_FONT_SIZE_LENGTH; + val->computed = value; + return; + } + } +} + + + +/** + * Set SPIEnum object from repr attribute. + */ +static void +sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, + gchar const *key, SPStyleEnum const *dict, + bool const can_explicitly_inherit) +{ + gchar const *str = repr->attribute(key); + if (str) { + sp_style_read_ienum(val, str, dict, can_explicitly_inherit); + } +} + + + +/** + * Set SPILength object from repr attribute. + */ +static void +sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key) +{ + gchar const *str = repr->attribute(key); + if (str) { + sp_style_read_ilength(val, str); + } +} + +/** + * Set SPIFontSize object from repr attribute. + */ +static void +sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key) +{ + gchar const *str = repr->attribute(key); + if (str) { + sp_style_read_ifontsize(val, str); + } +} + + +/** + * Set SPIFloat object from repr attribute. + */ +static void +sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key) +{ + gchar const *str = repr->attribute(key); + if (str) { + sp_style_read_ifloat(val, str); + } +} + + +/** + * Write SPIFloat object into string. + */ +static gint +sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key, + SPIFloat const *const val, SPIFloat const *const base, guint const flags) +{ + Inkscape::CSSOStringStream os; + + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || (val->value != base->value)))) + { + if (val->inherit) { + return g_snprintf(p, len, "%s:inherit;", key); + } else { + os << key << ":" << val->value << ";"; + return g_strlcpy(p, os.str().c_str(), len); + } + } + return 0; +} + + +/** + * Write SPIScale24 object into string. + */ +static gint +sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key, + SPIScale24 const *const val, SPIScale24 const *const base, + guint const flags) +{ + Inkscape::CSSOStringStream os; + + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || (val->value != base->value)))) + { + if (val->inherit) { + return g_snprintf(p, len, "%s:inherit;", key); + } else { + os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";"; + return g_strlcpy(p, os.str().c_str(), len); + } + } + return 0; +} + + +/** + * Write SPIEnum object into string. + */ +static gint +sp_style_write_ienum(gchar *p, gint const len, gchar const *const key, + SPStyleEnum const *const dict, + SPIEnum const *const val, SPIEnum const *const base, guint const flags) +{ + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || (val->computed != base->computed)))) + { + if (val->inherit) { + return g_snprintf(p, len, "%s:inherit;", key); + } + for (unsigned i = 0; dict[i].key; i++) { + if (dict[i].value == static_cast< gint > (val->value) ) { + return g_snprintf(p, len, "%s:%s;", key, dict[i].key); + } + } + } + return 0; +} + + + +/** + * Write SPIString object into string. + */ +static gint +sp_style_write_istring(gchar *p, gint const len, gchar const *const key, + SPIString const *const val, SPIString const *const base, guint const flags) +{ + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || strcmp(val->value, base->value)))) + { + if (val->inherit) { + return g_snprintf(p, len, "%s:inherit;", key); + } else { + return g_snprintf(p, len, "%s:%s;", key, val->value); + } + } + return 0; +} + + +/** + * + */ +static bool +sp_length_differ(SPILength const *const a, SPILength const *const b) +{ + if (a->unit != b->unit) { + if (a->unit == SP_CSS_UNIT_EM) return true; + if (a->unit == SP_CSS_UNIT_EX) return true; + if (a->unit == SP_CSS_UNIT_PERCENT) return true; + if (b->unit == SP_CSS_UNIT_EM) return true; + if (b->unit == SP_CSS_UNIT_EX) return true; + if (b->unit == SP_CSS_UNIT_PERCENT) return true; + } + + return (a->computed != b->computed); +} + + + +/** + * Write SPILength object into string. + */ +static gint +sp_style_write_ilength(gchar *p, gint const len, gchar const *const key, + SPILength const *const val, SPILength const *const base, guint const flags) +{ + Inkscape::CSSOStringStream os; + + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || sp_length_differ(val, base)))) + { + if (val->inherit) { + return g_snprintf(p, len, "%s:inherit;", key); + } else { + switch (val->unit) { + case SP_CSS_UNIT_NONE: + os << key << ":" << val->computed << ";"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_PX: + os << key << ":" << val->computed << "px;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_PT: + os << key << ":" << val->computed * PT_PER_PX << "pt;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_PC: + os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_MM: + os << key << ":" << val->computed * MM_PER_PX << "mm;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_CM: + os << key << ":" << val->computed * CM_PER_PX << "cm;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_IN: + os << key << ":" << val->computed * IN_PER_PX << "in;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_EM: + os << key << ":" << val->value << "em;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_EX: + os << key << ":" << val->value << "ex;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + case SP_CSS_UNIT_PERCENT: + os << key << ":" << (val->value * 100.0) << "%;"; + return g_strlcpy(p, os.str().c_str(), len); + break; + default: + /* Invalid */ + break; + } + } + } + return 0; +} + + +/** + * + */ +static bool +sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b) +{ + if (a->normal != b->normal) return true; + if (a->normal) return false; + + if (a->unit != b->unit) { + if (a->unit == SP_CSS_UNIT_EM) return true; + if (a->unit == SP_CSS_UNIT_EX) return true; + if (a->unit == SP_CSS_UNIT_PERCENT) return true; + if (b->unit == SP_CSS_UNIT_EM) return true; + if (b->unit == SP_CSS_UNIT_EX) return true; + if (b->unit == SP_CSS_UNIT_PERCENT) return true; + } + + return (a->computed != b->computed); +} + +/** + * Write SPILengthOrNormal object into string. + */ +static gint +sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key, + SPILengthOrNormal const *const val, + SPILengthOrNormal const *const base, + guint const flags) +{ + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || sp_lengthornormal_differ(val, base)))) + { + if (val->normal) { + return g_snprintf(p, len, "%s:normal;", key); + } else { + SPILength length; + length.set = val->set; + length.inherit = val->inherit; + length.unit = val->unit; + length.value = val->value; + length.computed = val->computed; + return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS); + } + } + return 0; +} + +/** + * + */ +static bool +sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b) +{ + return a->underline != b->underline + || a->overline != b->overline + || a->line_through != b->line_through + || a->blink != b->blink; +} + +/** + * Write SPITextDecoration object into string. + */ +static gint +sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key, + SPITextDecoration const *const val, + SPITextDecoration const *const base, + guint const flags) +{ + Inkscape::CSSOStringStream os; + + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || sp_textdecoration_differ(val, base)))) + { + if (val->inherit) { + return g_snprintf(p, len, "%s:inherit;", key); + } else { + os << key << ":"; + if (val->underline || val->overline || val->line_through || val->blink) { + if (val->underline) os << " underline"; + if (val->overline) os << " overline"; + if (val->line_through) os << " line-through"; + if (val->blink) os << " blink"; + } else + os << "none"; + os << ";"; + return g_strlcpy(p, os.str().c_str(), len); + } + } + return 0; +} + +/** + * + */ +static bool +sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b) +{ + if (a->type != b->type) + return true; + if (a->type == SP_PAINT_TYPE_COLOR) + return !sp_color_is_equal(&a->value.color, &b->value.color); + if (a->type == SP_PAINT_TYPE_PAINTSERVER) + return (a->value.paint.server != b->value.paint.server); + return false; +} + + + +/** + * Write SPIPaint object into string. + */ +static gint +sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key, + SPIPaint const *const paint, SPIPaint const *const base, guint const flags) +{ + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && paint->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set + && (!base->set || sp_paint_differ(paint, base)))) + { + if (paint->inherit) { + return g_snprintf(b, len, "%s:inherit;", key); + } else if (paint->currentcolor) { + return g_snprintf(b, len, "%s:currentColor;", key); + } else { + switch (paint->type) { + case SP_PAINT_TYPE_COLOR: + return g_snprintf(b, len, "%s:#%06x;", key, sp_color_get_rgba32_falpha(&paint->value.color, 0.0) >> 8); + break; + case SP_PAINT_TYPE_PAINTSERVER: + return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri); + break; + default: + break; + } + return g_snprintf(b, len, "%s:none;", key); + } + } + return 0; +} + + +/** + * + */ +static bool +sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b) +{ + if (a->type != b->type) + return true; + if (a->type == SP_FONT_SIZE_LENGTH) { + if (a->computed != b->computed) + return true; + } else { + if (a->value != b->value) + return true; + } + return false; +} + + +/** + * Write SPIFontSize object into string. + */ +static gint +sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key, + SPIFontSize const *const val, SPIFontSize const *const base, + guint const flags) +{ + if ((flags & SP_STYLE_FLAG_ALWAYS) + || ((flags & SP_STYLE_FLAG_IFSET) && val->set) + || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set + && (!base->set || sp_fontsize_differ(val, base)))) + { + if (val->inherit) { + return g_snprintf(p, len, "%s:inherit;", key); + } else if (val->type == SP_FONT_SIZE_LITERAL) { + for (unsigned i = 0; enum_font_size[i].key; i++) { + if (enum_font_size[i].value == static_cast< gint > (val->value) ) { + return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key); + } + } + } else if (val->type == SP_FONT_SIZE_LENGTH) { + Inkscape::CSSOStringStream os; + os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789 + return g_strlcpy(p, os.str().c_str(), len); + } else if (val->type == SP_FONT_SIZE_PERCENTAGE) { + Inkscape::CSSOStringStream os; + os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;"; + return g_strlcpy(p, os.str().c_str(), len); + } + } + return 0; +} + + +/** + * Clear paint object; conditionally disconnect style from paintserver. + */ +static void +sp_style_paint_clear(SPStyle *style, SPIPaint *paint, + unsigned hunref, unsigned unset) +{ + if (hunref && (paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) { + if (style->object && !style->cloned) { + sp_object_hunref(SP_OBJECT(paint->value.paint.server), style); + } + if (style->object || style->cloned) { + g_signal_handlers_disconnect_matched(G_OBJECT(paint->value.paint.server), + G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style); + } + paint->value.paint.server = NULL; + paint->value.paint.uri = NULL; + paint->type = SP_PAINT_TYPE_NONE; + } + + if (unset) { + paint->set = FALSE; + paint->inherit = FALSE; + } +} + +/** + * Clear all style property attributes in object. + */ +void +sp_style_unset_property_attrs(SPObject *o) +{ + if (!o) return; + + SPStyle *style = SP_OBJECT_STYLE(o); + if (!style) return; + + Inkscape::XML::Node *repr = SP_OBJECT_REPR(o); + if (!repr) return; + + if (style->opacity.set) { + repr->setAttribute("opacity", NULL); + } + if (style->color.set) { + repr->setAttribute("color", NULL); + } + if (style->fill.set) { + repr->setAttribute("fill", NULL); + } + if (style->fill_opacity.set) { + repr->setAttribute("fill-opacity", NULL); + } + if (style->fill_rule.set) { + repr->setAttribute("fill-rule", NULL); + } + if (style->stroke.set) { + repr->setAttribute("stroke", NULL); + } + if (style->stroke_width.set) { + repr->setAttribute("stroke-width", NULL); + } + if (style->stroke_linecap.set) { + repr->setAttribute("stroke-linecap", NULL); + } + if (style->stroke_linejoin.set) { + repr->setAttribute("stroke-linejoin", NULL); + } + if (style->marker[SP_MARKER_LOC].set) { + repr->setAttribute("marker", NULL); + } + if (style->marker[SP_MARKER_LOC_START].set) { + repr->setAttribute("marker-start", NULL); + } + if (style->marker[SP_MARKER_LOC_MID].set) { + repr->setAttribute("marker-mid", NULL); + } + if (style->marker[SP_MARKER_LOC_END].set) { + repr->setAttribute("marker-end", NULL); + } + if (style->stroke_opacity.set) { + repr->setAttribute("stroke-opacity", NULL); + } + if (style->stroke_dasharray_set) { + repr->setAttribute("stroke-dasharray", NULL); + } + if (style->stroke_dashoffset_set) { + repr->setAttribute("stroke-dashoffset", NULL); + } + if (style->text_private && style->text->font_family.set) { + repr->setAttribute("font-family", NULL); + } + if (style->text_anchor.set) { + repr->setAttribute("text-anchor", NULL); + } + if (style->writing_mode.set) { + repr->setAttribute("writing_mode", NULL); + } +} + +/** + * \pre style != NULL. + * \pre flags in {IFSET, ALWAYS}. + */ +SPCSSAttr * +sp_css_attr_from_style(SPStyle const *const style, guint const flags) +{ + g_return_val_if_fail(style != NULL, NULL); + g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) || + (flags == SP_STYLE_FLAG_ALWAYS) ), + NULL); + gchar *style_str = sp_style_write_string(style, flags); + SPCSSAttr *css = sp_repr_css_attr_new(); + sp_repr_css_attr_add_from_string(css, style_str); + g_free(style_str); + return css; +} + + +/** + * \pre object != NULL + * \pre flags in {IFSET, ALWAYS}. + */ +SPCSSAttr * +sp_css_attr_from_object(SPObject *object, guint const flags) +{ + g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) || + (flags == SP_STYLE_FLAG_ALWAYS) ), + NULL); + SPStyle const *const style = SP_OBJECT_STYLE(object); + if (style == NULL) + return NULL; + return sp_css_attr_from_style (style, flags); +} + +/** + * Unset any text-related properties + */ +SPCSSAttr * +sp_css_attr_unset_text(SPCSSAttr *css) +{ + sp_repr_css_set_property(css, "font", NULL); // not implemented yet + sp_repr_css_set_property(css, "font-size", NULL); + sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet + sp_repr_css_set_property(css, "font-style", NULL); + sp_repr_css_set_property(css, "font-variant", NULL); + sp_repr_css_set_property(css, "font-weight", NULL); + sp_repr_css_set_property(css, "font-stretch", NULL); + sp_repr_css_set_property(css, "font-family", NULL); + sp_repr_css_set_property(css, "text-indent", NULL); + sp_repr_css_set_property(css, "text-align", NULL); + sp_repr_css_set_property(css, "text-decoration", NULL); + sp_repr_css_set_property(css, "line-height", NULL); + sp_repr_css_set_property(css, "letter-spacing", NULL); + sp_repr_css_set_property(css, "word-spacing", NULL); + sp_repr_css_set_property(css, "text-transform", NULL); + sp_repr_css_set_property(css, "direction", NULL); + sp_repr_css_set_property(css, "block-progression", NULL); + sp_repr_css_set_property(css, "writing-mode", NULL); + sp_repr_css_set_property(css, "text-anchor", NULL); + sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet + sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet + sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet + sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet + + return css; +} + +bool +is_url(char const *p) +{ + if (p == NULL) + return false; +/** \todo + * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs + * in property values must start with 'url('. + */ + return (g_ascii_strncasecmp(p, "url(", 4) == 0); +} + +/** + * Unset any properties that contain URI values. + * + * Used for storing style that will be reused across documents when carrying + * the referenced defs is impractical. + */ +SPCSSAttr * +sp_css_attr_unset_uris(SPCSSAttr *css) +{ +// All properties that may hold <uri> or <paint> according to SVG 1.1 + if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL); + if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL); + if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL); + if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL); + if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL); + if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL); + if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL); + if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL); + if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL); + if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL); + + return css; +} + +/** + * Scale a single-value property. + */ +void +sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property, + double ex, bool only_with_units = false) +{ + gchar const *w = sp_repr_css_property(css, property, NULL); + if (w) { + gchar *units = NULL; + double wd = g_ascii_strtod(w, &units) * ex; + if (w == units) {// nothing converted, non-numeric value + return; + } + if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) { + // only_with_units, but no units found, so do nothing. + return; + } + Inkscape::CSSOStringStream os; + os << wd << units; // reattach units + sp_repr_css_set_property(css, property, os.str().c_str()); + } +} + +/** + * Scale a list-of-values property. + */ +void +sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex) +{ + gchar const *string = sp_repr_css_property(css, property, NULL); + if (string) { + Inkscape::CSSOStringStream os; + gchar **a = g_strsplit(string, ",", 10000); + bool first = true; + for (gchar **i = a; i != NULL; i++) { + gchar *w = *i; + if (w == NULL) + break; + gchar *units = NULL; + double wd = g_ascii_strtod(w, &units) * ex; + if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing + g_strfreev(a); + return; + } + if (!first) { + os << ","; + } + os << wd << units; // reattach units + first = false; + } + sp_repr_css_set_property(css, property, os.str().c_str()); + g_strfreev(a); + } +} + +/** + * Scale any properties that may hold <length> by ex. + */ +SPCSSAttr * +sp_css_attr_scale(SPCSSAttr *css, double ex) +{ + sp_css_attr_scale_property_single(css, "baseline-shift", ex); + sp_css_attr_scale_property_single(css, "stroke-width", ex); + sp_css_attr_scale_property_list (css, "stroke-dasharray", ex); + sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex); + sp_css_attr_scale_property_single(css, "font-size", ex); + sp_css_attr_scale_property_single(css, "kerning", ex); + sp_css_attr_scale_property_single(css, "letter-spacing", ex); + sp_css_attr_scale_property_single(css, "word-spacing", ex); + sp_css_attr_scale_property_single(css, "line-height", ex, true); + + return css; +} + + +/** + * Remove quotes from SPIString object value. + * + * \todo FIXME: now used for font family, but perhaps this should apply to + * ALL strings (check CSS spec), in which case this should be part of + * read_istring. + */ +void +css2_unescape_unquote (SPIString *val) +{ + if (val->set && val->value && strlen(val->value) >= 2) { + + /// \todo unescape all \-escaped chars + + int l = strlen(val->value); + if ((val->value[0] == '"' && val->value[l - 1] == '"') || + (val->value[0] == '\'' && val->value[l - 1] == '\'')) { + memcpy (val->value, val->value+1, l - 2); + val->value[l - 2] = '\0'; + } + } +} + + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 : |