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-rw-r--r--src/object/sp-stop.cpp265
1 files changed, 265 insertions, 0 deletions
diff --git a/src/object/sp-stop.cpp b/src/object/sp-stop.cpp
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--- /dev/null
+++ b/src/object/sp-stop.cpp
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+/** @file
+ * @gradient stop class.
+ */
+/* Authors:
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ * bulia byak
+ * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
+ * Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 1999,2005 authors
+ * Copyright (C) 2010 Jon A. Cruz
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+
+#include "sp-stop.h"
+#include "style.h"
+
+#include "attributes.h"
+#include "streq.h"
+#include "svg/svg.h"
+#include "svg/svg-color.h"
+#include "svg/css-ostringstream.h"
+
+SPStop::SPStop() : SPObject() {
+ this->path_string = NULL;
+
+ this->offset = 0.0;
+ this->currentColor = false;
+ this->specified_color.set( 0x000000ff );
+ this->opacity = 1.0;
+}
+
+SPStop::~SPStop() {
+}
+
+void SPStop::build(SPDocument* doc, Inkscape::XML::Node* repr) {
+ SPObject::build(doc, repr);
+
+ this->readAttr( "offset" );
+ this->readAttr( "stop-color" );
+ this->readAttr( "stop-opacity" );
+ this->readAttr( "style" );
+ this->readAttr( "path" ); // For mesh
+}
+
+/**
+ * Virtual build: set stop attributes from its associated XML node.
+ */
+
+void SPStop::set(unsigned int key, const gchar* value) {
+ switch (key) {
+ case SP_ATTR_STYLE: {
+ /** \todo
+ * fixme: We are reading simple values 3 times during build (Lauris).
+ * \par
+ * We need presentation attributes etc.
+ * \par
+ * remove the hackish "style reading" from here: see comments in
+ * sp_object_get_style_property about the bugs in our current
+ * approach. However, note that SPStyle doesn't currently have
+ * stop-color and stop-opacity properties.
+ */
+ {
+ gchar const *p = this->getStyleProperty( "stop-color", "black");
+ if (streq(p, "currentColor")) {
+ this->currentColor = true;
+ } else {
+ this->specified_color = SPStop::readStopColor( p );
+ }
+ }
+ {
+ gchar const *p = this->getStyleProperty( "stop-opacity", "1");
+ gdouble opacity = sp_svg_read_percentage(p, this->opacity);
+ this->opacity = opacity;
+ }
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+ break;
+ }
+ case SP_PROP_STOP_COLOR: {
+ {
+ gchar const *p = this->getStyleProperty( "stop-color", "black");
+ if (streq(p, "currentColor")) {
+ this->currentColor = true;
+ } else {
+ this->currentColor = false;
+ this->specified_color = SPStop::readStopColor( p );
+ }
+ }
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+ break;
+ }
+ case SP_PROP_STOP_OPACITY: {
+ {
+ gchar const *p = this->getStyleProperty( "stop-opacity", "1");
+ gdouble opacity = sp_svg_read_percentage(p, this->opacity);
+ this->opacity = opacity;
+ }
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+ break;
+ }
+ case SP_ATTR_OFFSET: {
+ this->offset = sp_svg_read_percentage(value, 0.0);
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+ break;
+ }
+ case SP_PROP_STOP_PATH: {
+ if (value) {
+ this->path_string = new Glib::ustring( value );
+ //Geom::PathVector pv = sp_svg_read_pathv(value);
+ //SPCurve *curve = new SPCurve(pv);
+ //if( curve ) {
+ // std::cout << "Got Curve" << std::endl;
+ //curve->unref();
+ //}
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ }
+ break;
+ }
+ default: {
+ SPObject::set(key, value);
+ break;
+ }
+ }
+}
+
+/**
+ * Virtual set: set attribute to value.
+ */
+
+Inkscape::XML::Node* SPStop::write(Inkscape::XML::Document* xml_doc, Inkscape::XML::Node* repr, guint flags) {
+ if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+ repr = xml_doc->createElement("svg:stop");
+ }
+
+ Glib::ustring colorStr = this->specified_color.toString();
+ gfloat opacity = this->opacity;
+
+ SPObject::write(xml_doc, repr, flags);
+
+ // Since we do a hackish style setting here (because SPStyle does not support stop-color and
+ // stop-opacity), we must do it AFTER calling the parent write method; otherwise
+ // sp_object_write would clear our style= attribute (bug 1695287)
+
+ Inkscape::CSSOStringStream os;
+ os << "stop-color:";
+ if (this->currentColor) {
+ os << "currentColor";
+ } else {
+ os << colorStr;
+ }
+ os << ";stop-opacity:" << opacity;
+ repr->setAttribute("style", os.str().c_str());
+ repr->setAttribute("stop-color", NULL);
+ repr->setAttribute("stop-opacity", NULL);
+ sp_repr_set_css_double(repr, "offset", this->offset);
+ /* strictly speaking, offset an SVG <number> rather than a CSS one, but exponents make no sense
+ * for offset proportions. */
+
+ return repr;
+}
+
+/**
+ * Virtual write: write object attributes to repr.
+ */
+
+// A stop might have some non-stop siblings
+SPStop* SPStop::getNextStop() {
+ SPStop *result = 0;
+
+ for (SPObject* obj = getNext(); obj && !result; obj = obj->getNext()) {
+ if (SP_IS_STOP(obj)) {
+ result = SP_STOP(obj);
+ }
+ }
+
+ return result;
+}
+
+SPStop* SPStop::getPrevStop() {
+ SPStop *result = 0;
+
+ for (SPObject* obj = getPrev(); obj; obj = obj->getPrev()) {
+ // The closest previous SPObject that is an SPStop *should* be ourself.
+ if (SP_IS_STOP(obj)) {
+ SPStop* stop = SP_STOP(obj);
+ // Sanity check to ensure we have a proper sibling structure.
+ if (stop->getNextStop() == this) {
+ result = stop;
+ } else {
+ g_warning("SPStop previous/next relationship broken");
+ }
+ break;
+ }
+ }
+
+ return result;
+}
+
+SPColor SPStop::readStopColor(Glib::ustring const &styleStr, guint32 dfl) {
+ SPColor color(dfl);
+ SPIPaint paint;
+
+ paint.read( styleStr.c_str() );
+
+ if ( paint.isColor() ) {
+ color = paint.value.color;
+ }
+
+ return color;
+}
+
+SPColor SPStop::getEffectiveColor() const {
+ SPColor ret;
+
+ if (currentColor) {
+ char const *str = getStyleProperty("color", NULL);
+ /* Default value: arbitrarily black. (SVG1.1 and CSS2 both say that the initial
+ * value depends on user agent, and don't give any further restrictions that I can
+ * see.) */
+ ret = readStopColor( str, 0 );
+ } else {
+ ret = specified_color;
+ }
+
+ return ret;
+}
+
+/**
+ * Return stop's color as 32bit value.
+ */
+guint32 SPStop::get_rgba32() const {
+ guint32 rgb0 = 0;
+
+ /* Default value: arbitrarily black. (SVG1.1 and CSS2 both say that the initial
+ * value depends on user agent, and don't give any further restrictions that I can
+ * see.) */
+ if (this->currentColor) {
+ char const *str = this->getStyleProperty("color", NULL);
+
+ if (str) {
+ rgb0 = sp_svg_read_color(str, rgb0);
+ }
+
+ unsigned const alpha = static_cast<unsigned>(this->opacity * 0xff + 0.5);
+
+ g_return_val_if_fail((alpha & ~0xff) == 0, rgb0 | 0xff);
+
+ return rgb0 | alpha;
+ } else {
+ return this->specified_color.toRGBA32(this->opacity);
+ }
+}
+
+/*
+ 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:fileencoding=utf-8:textwidth=99 :
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