moving trunk for module inkscape

(bzr r1)

1 files changed, 467 insertions, 0 deletions

diff --git a/src/sp-symbol.cpp b/src/sp-symbol.cpp
new file mode 100644
index 000000000..a7b0312e9
--- /dev/null
+++ b/src/sp-symbol.cpp
@@ -0,0 +1,467 @@
+#define __SP_SYMBOL_C__
+
+/*
+ * SVG <symbol> implementation
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 1999-2003 Lauris Kaplinski
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "config.h"
+
+#include "libnr/nr-matrix-fns.h"
+#include "libnr/nr-matrix-ops.h"
+#include "display/nr-arena-group.h"
+#include "xml/repr.h"
+#include "attributes.h"
+#include "print.h"
+#include "sp-symbol.h"
+
+static void sp_symbol_class_init (SPSymbolClass *klass);
+static void sp_symbol_init (SPSymbol *symbol);
+
+static void sp_symbol_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
+static void sp_symbol_release (SPObject *object);
+static void sp_symbol_set (SPObject *object, unsigned int key, const gchar *value);
+static void sp_symbol_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
+static void sp_symbol_update (SPObject *object, SPCtx *ctx, guint flags);
+static void sp_symbol_modified (SPObject *object, guint flags);
+static Inkscape::XML::Node *sp_symbol_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
+
+static NRArenaItem *sp_symbol_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
+static void sp_symbol_hide (SPItem *item, unsigned int key);
+static void sp_symbol_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
+static void sp_symbol_print (SPItem *item, SPPrintContext *ctx);
+
+static SPGroupClass *parent_class;
+
+GType
+sp_symbol_get_type (void)
+{
+	static GType type = 0;
+	if (!type) {
+		GTypeInfo info = {
+			sizeof (SPSymbolClass),
+			NULL, NULL,
+			(GClassInitFunc) sp_symbol_class_init,
+			NULL, NULL,
+			sizeof (SPSymbol),
+			16,
+			(GInstanceInitFunc) sp_symbol_init,
+			NULL,	/* value_table */
+		};
+		type = g_type_register_static (SP_TYPE_GROUP, "SPSymbol", &info, (GTypeFlags)0);
+	}
+	return type;
+}
+
+static void
+sp_symbol_class_init (SPSymbolClass *klass)
+{
+	GObjectClass *object_class;
+	SPObjectClass *sp_object_class;
+	SPItemClass *sp_item_class;
+
+	object_class = G_OBJECT_CLASS (klass);
+	sp_object_class = (SPObjectClass *) klass;
+	sp_item_class = (SPItemClass *) klass;
+
+	parent_class = (SPGroupClass *)g_type_class_ref (SP_TYPE_GROUP);
+
+	sp_object_class->build = sp_symbol_build;
+	sp_object_class->release = sp_symbol_release;
+	sp_object_class->set = sp_symbol_set;
+	sp_object_class->child_added = sp_symbol_child_added;
+	sp_object_class->update = sp_symbol_update;
+	sp_object_class->modified = sp_symbol_modified;
+	sp_object_class->write = sp_symbol_write;
+
+	sp_item_class->show = sp_symbol_show;
+	sp_item_class->hide = sp_symbol_hide;
+	sp_item_class->bbox = sp_symbol_bbox;
+	sp_item_class->print = sp_symbol_print;
+}
+
+static void
+sp_symbol_init (SPSymbol *symbol)
+{
+	symbol->viewBox_set = FALSE;
+
+	nr_matrix_set_identity (&symbol->c2p);
+}
+
+static void
+sp_symbol_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
+{
+	SPGroup *group;
+	SPSymbol *symbol;
+
+	group = (SPGroup *) object;
+	symbol = (SPSymbol *) object;
+
+	sp_object_read_attr (object, "viewBox");
+	sp_object_read_attr (object, "preserveAspectRatio");
+
+	if (((SPObjectClass *) parent_class)->build)
+		((SPObjectClass *) parent_class)->build (object, document, repr);
+}
+
+static void
+sp_symbol_release (SPObject *object)
+{
+	SPSymbol * symbol;
+
+	symbol = (SPSymbol *) object;
+
+	if (((SPObjectClass *) parent_class)->release)
+		((SPObjectClass *) parent_class)->release (object);
+}
+
+static void
+sp_symbol_set (SPObject *object, unsigned int key, const gchar *value)
+{
+	SPItem *item;
+	SPSymbol *symbol;
+
+	item = SP_ITEM (object);
+	symbol = SP_SYMBOL (object);
+
+	switch (key) {
+	case SP_ATTR_VIEWBOX:
+		if (value) {
+			double x, y, width, height;
+			char *eptr;
+			/* fixme: We have to take original item affine into account */
+			/* fixme: Think (Lauris) */
+			eptr = (gchar *) value;
+			x = g_ascii_strtod (eptr, &eptr);
+			while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+			y = g_ascii_strtod (eptr, &eptr);
+			while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+			width = g_ascii_strtod (eptr, &eptr);
+			while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+			height = g_ascii_strtod (eptr, &eptr);
+			while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+			if ((width > 0) && (height > 0)) {
+				/* Set viewbox */
+				symbol->viewBox.x0 = x;
+				symbol->viewBox.y0 = y;
+				symbol->viewBox.x1 = x + width;
+				symbol->viewBox.y1 = y + height;
+				symbol->viewBox_set = TRUE;
+			} else {
+				symbol->viewBox_set = FALSE;
+			}
+		} else {
+			symbol->viewBox_set = FALSE;
+		}
+		object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
+		break;
+	case SP_ATTR_PRESERVEASPECTRATIO:
+		/* Do setup before, so we can use break to escape */
+		symbol->aspect_set = FALSE;
+		symbol->aspect_align = SP_ASPECT_NONE;
+		symbol->aspect_clip = SP_ASPECT_MEET;
+		object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
+		if (value) {
+			int len;
+			gchar c[256];
+			const gchar *p, *e;
+			unsigned int align, clip;
+			p = value;
+			while (*p && *p == 32) p += 1;
+			if (!*p) break;
+			e = p;
+			while (*e && *e != 32) e += 1;
+			len = e - p;
+			if (len > 8) break;
+			memcpy (c, value, len);
+			c[len] = 0;
+			/* Now the actual part */
+			if (!strcmp (c, "none")) {
+				align = SP_ASPECT_NONE;
+			} else if (!strcmp (c, "xMinYMin")) {
+				align = SP_ASPECT_XMIN_YMIN;
+			} else if (!strcmp (c, "xMidYMin")) {
+				align = SP_ASPECT_XMID_YMIN;
+			} else if (!strcmp (c, "xMaxYMin")) {
+				align = SP_ASPECT_XMAX_YMIN;
+			} else if (!strcmp (c, "xMinYMid")) {
+				align = SP_ASPECT_XMIN_YMID;
+			} else if (!strcmp (c, "xMidYMid")) {
+				align = SP_ASPECT_XMID_YMID;
+			} else if (!strcmp (c, "xMaxYMin")) {
+				align = SP_ASPECT_XMAX_YMID;
+			} else if (!strcmp (c, "xMinYMax")) {
+				align = SP_ASPECT_XMIN_YMAX;
+			} else if (!strcmp (c, "xMidYMax")) {
+				align = SP_ASPECT_XMID_YMAX;
+			} else if (!strcmp (c, "xMaxYMax")) {
+				align = SP_ASPECT_XMAX_YMAX;
+			} else {
+				break;
+			}
+			clip = SP_ASPECT_MEET;
+			while (*e && *e == 32) e += 1;
+			if (e) {
+				if (!strcmp (e, "meet")) {
+					clip = SP_ASPECT_MEET;
+				} else if (!strcmp (e, "slice")) {
+					clip = SP_ASPECT_SLICE;
+				} else {
+					break;
+				}
+			}
+			symbol->aspect_set = TRUE;
+			symbol->aspect_align = align;
+			symbol->aspect_clip = clip;
+		}
+		break;
+	default:
+		if (((SPObjectClass *) parent_class)->set)
+			((SPObjectClass *) parent_class)->set (object, key, value);
+		break;
+	}
+}
+
+static void
+sp_symbol_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
+{
+	SPSymbol *symbol;
+	SPGroup *group;
+
+	symbol = (SPSymbol *) object;
+	group = (SPGroup *) object;
+
+	if (((SPObjectClass *) (parent_class))->child_added)
+		((SPObjectClass *) (parent_class))->child_added (object, child, ref);
+}
+
+static void
+sp_symbol_update (SPObject *object, SPCtx *ctx, guint flags)
+{
+	SPItem *item;
+	SPSymbol *symbol;
+	SPItemCtx *ictx, rctx;
+	SPItemView *v;
+
+	item = SP_ITEM (object);
+	symbol = SP_SYMBOL (object);
+	ictx = (SPItemCtx *) ctx;
+
+	if (SP_OBJECT_IS_CLONED (object)) {
+		/* Cloned <symbol> is actually renderable */
+
+		/* fixme: We have to set up clip here too */
+
+		/* Create copy of item context */
+		rctx = *ictx;
+
+		/* Calculate child to parent transformation */
+		/* Apply parent <use> translation (set up as vewport) */
+		nr_matrix_set_translate (&symbol->c2p, rctx.vp.x0, rctx.vp.y0);
+
+		if (symbol->viewBox_set) {
+			double x, y, width, height;
+			NRMatrix q;
+			/* Determine actual viewbox in viewport coordinates */
+			if (symbol->aspect_align == SP_ASPECT_NONE) {
+				x = 0.0;
+				y = 0.0;
+				width = rctx.vp.x1 - rctx.vp.x0;
+				height = rctx.vp.y1 - rctx.vp.y0;
+			} else {
+				double scalex, scaley, scale;
+				/* Things are getting interesting */
+				scalex = (rctx.vp.x1 - rctx.vp.x0) / (symbol->viewBox.x1 - symbol->viewBox.x0);
+				scaley = (rctx.vp.y1 - rctx.vp.y0) / (symbol->viewBox.y1 - symbol->viewBox.y0);
+				scale = (symbol->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
+				width = (symbol->viewBox.x1 - symbol->viewBox.x0) * scale;
+				height = (symbol->viewBox.y1 - symbol->viewBox.y0) * scale;
+				/* Now place viewbox to requested position */
+				switch (symbol->aspect_align) {
+				case SP_ASPECT_XMIN_YMIN:
+					x = 0.0;
+					y = 0.0;
+					break;
+				case SP_ASPECT_XMID_YMIN:
+					x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+					y = 0.0;
+					break;
+				case SP_ASPECT_XMAX_YMIN:
+					x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+					y = 0.0;
+					break;
+				case SP_ASPECT_XMIN_YMID:
+					x = 0.0;
+					y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+					break;
+				case SP_ASPECT_XMID_YMID:
+					x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+					y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+					break;
+				case SP_ASPECT_XMAX_YMID:
+					x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+					y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+					break;
+				case SP_ASPECT_XMIN_YMAX:
+					x = 0.0;
+					y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+					break;
+				case SP_ASPECT_XMID_YMAX:
+					x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+					y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+					break;
+				case SP_ASPECT_XMAX_YMAX:
+					x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+					y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+					break;
+				default:
+					x = 0.0;
+					y = 0.0;
+					break;
+				}
+			}
+			/* Compose additional transformation from scale and position */
+			q.c[0] = width / (symbol->viewBox.x1 - symbol->viewBox.x0);
+			q.c[1] = 0.0;
+			q.c[2] = 0.0;
+			q.c[3] = height / (symbol->viewBox.y1 - symbol->viewBox.y0);
+			q.c[4] = -symbol->viewBox.x0 * q.c[0] + x;
+			q.c[5] = -symbol->viewBox.y0 * q.c[3] + y;
+			/* Append viewbox transformation */
+			nr_matrix_multiply (&symbol->c2p, &q, &symbol->c2p);
+		}
+
+		rctx.i2doc = symbol->c2p * rctx.i2doc;
+
+		/* If viewBox is set initialize child viewport */
+		/* Otherwise <use> has set it up already */
+		if (symbol->viewBox_set) {
+			rctx.vp.x0 = symbol->viewBox.x0;
+			rctx.vp.y0 = symbol->viewBox.y0;
+			rctx.vp.x1 = symbol->viewBox.x1;
+			rctx.vp.y1 = symbol->viewBox.y1;
+			rctx.i2vp = NR::identity();
+		}
+
+		/* And invoke parent method */
+		if (((SPObjectClass *) (parent_class))->update)
+			((SPObjectClass *) (parent_class))->update (object, (SPCtx *) &rctx, flags);
+
+		/* As last step set additional transform of arena group */
+		for (v = item->display; v != NULL; v = v->next) {
+			nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->arenaitem), &symbol->c2p);
+		}
+	} else {
+		/* No-op */
+		if (((SPObjectClass *) (parent_class))->update)
+			((SPObjectClass *) (parent_class))->update (object, ctx, flags);
+	}
+}
+
+static void
+sp_symbol_modified (SPObject *object, guint flags)
+{
+	SPSymbol *symbol;
+
+	symbol = SP_SYMBOL (object);
+
+	if (((SPObjectClass *) (parent_class))->modified)
+		(* ((SPObjectClass *) (parent_class))->modified) (object, flags);
+}
+
+static Inkscape::XML::Node *
+sp_symbol_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
+{
+	SPSymbol *symbol;
+
+	symbol = SP_SYMBOL (object);
+
+	if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+		repr = sp_repr_new ("svg:symbol");
+	}
+
+	repr->setAttribute("viewBox", object->repr->attribute("viewBox"));
+	repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
+
+	if (((SPObjectClass *) (parent_class))->write)
+		((SPObjectClass *) (parent_class))->write (object, repr, flags);
+
+	return repr;
+}
+
+static NRArenaItem *
+sp_symbol_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags)
+{
+	SPSymbol *symbol;
+	NRArenaItem *ai;
+
+	symbol = SP_SYMBOL (item);
+
+	if (SP_OBJECT_IS_CLONED (symbol)) {
+		/* Cloned <symbol> is actually renderable */
+		if (((SPItemClass *) (parent_class))->show) {
+			ai = ((SPItemClass *) (parent_class))->show (item, arena, key, flags);
+			if (ai) {
+				nr_arena_group_set_child_transform(NR_ARENA_GROUP(ai), &symbol->c2p);
+			}
+		} else {
+			ai = NULL;
+		}
+	} else {
+		ai = NULL;
+	}
+
+	return ai;
+}
+
+static void
+sp_symbol_hide (SPItem *item, unsigned int key)
+{
+	SPSymbol *symbol;
+
+	symbol = SP_SYMBOL (item);
+
+	if (SP_OBJECT_IS_CLONED (symbol)) {
+		/* Cloned <symbol> is actually renderable */
+		if (((SPItemClass *) (parent_class))->hide)
+			((SPItemClass *) (parent_class))->hide (item, key);
+	}
+}
+
+static void
+sp_symbol_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags)
+{
+	SPSymbol const *symbol = SP_SYMBOL(item);
+
+	if (SP_OBJECT_IS_CLONED (symbol)) {
+		/* Cloned <symbol> is actually renderable */
+
+		if (((SPItemClass *) (parent_class))->bbox) {
+			NR::Matrix const a( symbol->c2p * transform );
+			((SPItemClass *) (parent_class))->bbox(item, bbox, a, flags);
+		}
+	}
+}
+
+static void
+sp_symbol_print (SPItem *item, SPPrintContext *ctx)
+{
+	SPSymbol *symbol = SP_SYMBOL(item);
+	if (SP_OBJECT_IS_CLONED (symbol)) {
+		/* Cloned <symbol> is actually renderable */
+
+		sp_print_bind(ctx, &symbol->c2p, 1.0);
+
+		if (((SPItemClass *) (parent_class))->print) {
+			((SPItemClass *) (parent_class))->print (item, ctx);
+		}
+
+		sp_print_release (ctx);
+	}
+}