1 files changed, 133 insertions, 0 deletions
diff --git a/src/sp-linear-gradient.cpp b/src/sp-linear-gradient.cpp
new file mode 100644
index 000000000..d1d3f9d74
--- /dev/null
+++ b/src/sp-linear-gradient.cpp
@@ -0,0 +1,133 @@
+#include "sp-linear-gradient.h"
+
+#include "attributes.h"
+#include "xml/repr.h"
+
+#include "sp-factory.h"
+
+namespace {
+	SPObject* createLinearGradient() {
+		return new SPLinearGradient();
+	}
+
+	bool linearGradientRegistered = SPFactory::instance().registerObject("svg:linearGradient", createLinearGradient);
+}
+
+
+/*
+ * Linear Gradient
+ */
+SPLinearGradient::SPLinearGradient() : SPGradient() {
+	this->cobject = this;
+
+    this->x1.unset(SVGLength::PERCENT, 0.0, 0.0);
+    this->y1.unset(SVGLength::PERCENT, 0.0, 0.0);
+    this->x2.unset(SVGLength::PERCENT, 1.0, 1.0);
+    this->y2.unset(SVGLength::PERCENT, 0.0, 0.0);
+}
+
+SPLinearGradient::~SPLinearGradient() {
+}
+
+void SPLinearGradient::build(SPDocument *document, Inkscape::XML::Node *repr) {
+    SPGradient::build(document, repr);
+
+    this->readAttr( "x1" );
+    this->readAttr( "y1" );
+    this->readAttr( "x2" );
+    this->readAttr( "y2" );
+}
+
+/**
+ * Callback: set attribute.
+ */
+void SPLinearGradient::set(unsigned int key, const gchar* value) {
+    switch (key) {
+        case SP_ATTR_X1:
+            this->x1.readOrUnset(value, SVGLength::PERCENT, 0.0, 0.0);
+            this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_Y1:
+            this->y1.readOrUnset(value, SVGLength::PERCENT, 0.0, 0.0);
+            this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_X2:
+            this->x2.readOrUnset(value, SVGLength::PERCENT, 1.0, 1.0);
+            this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_Y2:
+            this->y2.readOrUnset(value, SVGLength::PERCENT, 0.0, 0.0);
+            this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        default:
+            SPGradient::set(key, value);
+            break;
+    }
+}
+
+/**
+ * Callback: write attributes to associated repr.
+ */
+Inkscape::XML::Node* SPLinearGradient::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+    if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+        repr = xml_doc->createElement("svg:linearGradient");
+    }
+
+    if ((flags & SP_OBJECT_WRITE_ALL) || this->x1._set) {
+        sp_repr_set_svg_double(repr, "x1", this->x1.computed);
+    }
+
+    if ((flags & SP_OBJECT_WRITE_ALL) || this->y1._set) {
+        sp_repr_set_svg_double(repr, "y1", this->y1.computed);
+    }
+
+    if ((flags & SP_OBJECT_WRITE_ALL) || this->x2._set) {
+        sp_repr_set_svg_double(repr, "x2", this->x2.computed);
+    }
+
+    if ((flags & SP_OBJECT_WRITE_ALL) || this->y2._set) {
+        sp_repr_set_svg_double(repr, "y2", this->y2.computed);
+    }
+
+    SPGradient::write(xml_doc, repr, flags);
+
+    return repr;
+}
+
+
+/**
+ * Directly set properties of linear gradient and request modified.
+ */
+void
+sp_lineargradient_set_position(SPLinearGradient *lg,
+                               gdouble x1, gdouble y1,
+                               gdouble x2, gdouble y2)
+{
+    g_return_if_fail(lg != NULL);
+    g_return_if_fail(SP_IS_LINEARGRADIENT(lg));
+
+    /* fixme: units? (Lauris)  */
+    lg->x1.set(SVGLength::NONE, x1, x1);
+    lg->y1.set(SVGLength::NONE, y1, y1);
+    lg->x2.set(SVGLength::NONE, x2, x2);
+    lg->y2.set(SVGLength::NONE, y2, y2);
+
+    lg->requestModified(SP_OBJECT_MODIFIED_FLAG);
+}
+
+
+cairo_pattern_t* SPLinearGradient::pattern_new(cairo_t *ct, Geom::OptRect const &bbox, double opacity) {
+    this->ensureVector();
+
+    cairo_pattern_t *cp = cairo_pattern_create_linear(
+        this->x1.computed, this->y1.computed,
+        this->x2.computed, this->y2.computed);
+
+    sp_gradient_pattern_common_setup(cp, this, bbox, opacity);
+
+    return cp;
+}