[lasem] tspan: start the implementation of tspan element.

[Emmanuel Pacaud <emmanuel src gnome org>]

commit c49496fbfe1d5877c3581e2e032407062534424c
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Wed Aug 4 00:59:25 2010 +0200

    tspan: start the implementation of tspan element.
    
    Not much been done, but at least lasem renders something.

 src/Makefile.am          |    2 +
 src/lsmsvg.h             |    1 +
 src/lsmsvgdocument.c     |    3 +
 src/lsmsvgtextelement.c  |    7 ++-
 src/lsmsvgtspanelement.c |  138 ++++++++++++++++++++++++++++++++++++++++++++++
 src/lsmsvgtspanelement.h |   57 +++++++++++++++++++
 6 files changed, 207 insertions(+), 1 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index a43daf6..b35fb4a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -98,6 +98,7 @@ liblasem_ LASEM_API_VERSION@_la_SOURCES =				\
 	lsmsvgpolygonelement.c			\
 	lsmsvgpathelement.c			\
 	lsmsvgtextelement.c			\
+	lsmsvgtspanelement.c			\
 	lsmsvggradientelement.c			\
 	lsmsvglineargradientelement.c		\
 	lsmsvgradialgradientelement.c		\
@@ -185,6 +186,7 @@ LASEM_HDRS = \
 	lsmsvgpolylineelement.h			\
 	lsmsvgpolygonelement.h			\
 	lsmsvgtextelement.h			\
+	lsmsvgtspanelement.h			\
 	lsmsvggradientelement.h			\
 	lsmsvglineargradientelement.h		\
 	lsmsvgradialgradientelement.h		\
diff --git a/src/lsmsvg.h b/src/lsmsvg.h
index 1d9b3c1..a6b61d5 100644
--- a/src/lsmsvg.h
+++ b/src/lsmsvg.h
@@ -46,6 +46,7 @@ typedef struct _LsmSvgPolylineElement LsmSvgPolylineElement;
 typedef struct _LsmSvgPolygonElement LsmSvgPolygonElement;
 typedef struct _LsmSvgPathElement LsmSvgPathElement;
 typedef struct _LsmSvgTextElement LsmSvgTextElement;
+typedef struct _LsmSvgTspanElement LsmSvgTspanElement;
 typedef struct _LsmSvgGradientElement LsmSvgGradientElement;
 typedef struct _LsmSvgLinearGradientElement LsmSvgLinearGradientElement;
 typedef struct _LsmSvgRadialGradientElement LsmSvgRadialGradientElement;
diff --git a/src/lsmsvgdocument.c b/src/lsmsvgdocument.c
index 9a0747c..8684cc2 100644
--- a/src/lsmsvgdocument.c
+++ b/src/lsmsvgdocument.c
@@ -38,6 +38,7 @@
 #include <lsmsvgpolygonelement.h>
 #include <lsmsvgpathelement.h>
 #include <lsmsvgtextelement.h>
+#include <lsmsvgtspanelement.h>
 #include <lsmsvglineargradientelement.h>
 #include <lsmsvgradialgradientelement.h>
 #include <lsmsvgstopelement.h>
@@ -104,6 +105,8 @@ lsm_svg_document_create_element (LsmDomDocument *document, const char *tag_name)
 		node = lsm_svg_polygon_element_new ();
 	else if (strcmp (tag_name, "text") == 0)
 		node = lsm_svg_text_element_new ();
+	else if (strcmp (tag_name, "tspan") == 0)
+		node = lsm_svg_tspan_element_new ();
 	else if (strcmp (tag_name, "linearGradient") == 0)
 		node = lsm_svg_linear_gradient_element_new ();
 	else if (strcmp (tag_name, "radialGradient") == 0)
diff --git a/src/lsmsvgtextelement.c b/src/lsmsvgtextelement.c
index 3d112d6..3e5647d 100644
--- a/src/lsmsvgtextelement.c
+++ b/src/lsmsvgtextelement.c
@@ -21,6 +21,7 @@
  */
 
 #include <lsmsvgtextelement.h>
+#include <lsmsvgtspanelement.h>
 #include <lsmsvgview.h>
 #include <lsmdomtext.h>
 
@@ -37,7 +38,7 @@ lsm_svg_text_element_get_node_name (LsmDomNode *node)
 static gboolean
 lsm_svg_text_element_can_append_child (LsmDomNode *self, LsmDomNode *child)
 {
-	return (LSM_IS_DOM_TEXT (child));
+	return (LSM_IS_SVG_TSPAN_ELEMENT (child) || LSM_IS_DOM_TEXT (child));
 }
 
 /* LsmSvgElement implementation */
@@ -68,6 +69,10 @@ lsm_svg_text_element_render (LsmSvgElement *self, LsmSvgView *view)
 	lsm_svg_view_show_text (view, g_strstrip (string->str), x, y);
 
 	g_string_free (string, TRUE);
+
+	for (iter = LSM_DOM_NODE (self)->first_child; iter != NULL; iter = iter->next_sibling)
+		if (LSM_IS_SVG_ELEMENT (iter))
+		    lsm_svg_element_render (LSM_SVG_ELEMENT (iter), view);
 }
 
 /* LsmSvgTextElement implementation */
diff --git a/src/lsmsvgtspanelement.c b/src/lsmsvgtspanelement.c
new file mode 100644
index 0000000..776cb07
--- /dev/null
+++ b/src/lsmsvgtspanelement.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright © 2009 Emmanuel Pacaud
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author:
+ * 	Emmanuel Pacaud <emmanuel gnome org>
+ */
+
+#include <lsmsvgtspanelement.h>
+#include <lsmsvgview.h>
+#include <lsmdomtext.h>
+#include <lsmdebug.h>
+
+static GObjectClass *parent_class;
+
+/* GdomNode implementation */
+
+static const char *
+lsm_svg_tspan_element_get_node_name (LsmDomNode *node)
+{
+	return "tspan";
+}
+
+static gboolean
+lsm_svg_tspan_element_can_append_child (LsmDomNode *self, LsmDomNode *child)
+{
+	return (LSM_IS_DOM_TEXT (child));
+}
+
+/* LsmSvgElement implementation */
+
+/* LsmSvgGraphic implementation */
+
+static void
+lsm_svg_tspan_element_render (LsmSvgElement *self, LsmSvgView *view)
+{
+	LsmSvgTspanElement *tspan = LSM_SVG_TSPAN_ELEMENT (self);
+	LsmDomNode *node = LSM_DOM_NODE (self);
+	LsmDomNode *iter;
+	GString *string = g_string_new ("");
+	double x, y;
+
+	lsm_debug ("render", "[LsmSvgTspanElement::render] Render");
+
+	if (node->first_child == NULL)
+		return;
+
+	for (iter = LSM_DOM_NODE (self)->first_child; iter != NULL; iter = iter->next_sibling) {
+		if (LSM_IS_DOM_TEXT (iter)) {
+			g_string_append (string, lsm_dom_node_get_node_value (iter));
+		}
+	}
+
+	x = lsm_svg_view_normalize_length (view, &tspan->x.length, LSM_SVG_LENGTH_DIRECTION_HORIZONTAL);
+	y = lsm_svg_view_normalize_length (view, &tspan->y.length, LSM_SVG_LENGTH_DIRECTION_VERTICAL);
+
+	lsm_svg_view_show_text (view, g_strstrip (string->str), x, y);
+
+	g_string_free (string, TRUE);
+}
+
+/* LsmSvgTspanElement implementation */
+
+LsmDomNode *
+lsm_svg_tspan_element_new (void)
+{
+	return g_object_new (LSM_TYPE_SVG_TSPAN_ELEMENT, NULL);
+}
+
+static const LsmSvgLength length_default = 	 { .value_unit =   0.0, .type = LSM_SVG_LENGTH_TYPE_PX};
+
+static void
+lsm_svg_tspan_element_init (LsmSvgTspanElement *self)
+{
+	self->x.length = length_default;
+	self->y.length = length_default;
+}
+
+static void
+lsm_svg_tspan_element_finalize (GObject *object)
+{
+	parent_class->finalize (object);
+}
+
+/* LsmSvgTspanElement class */
+
+static const LsmAttributeInfos lsm_svg_tspan_element_attribute_infos[] = {
+	{
+		.name = "x",
+		.attribute_offset = offsetof (LsmSvgTspanElement, x),
+		.trait_class = &lsm_svg_length_trait_class,
+		.trait_default = &length_default
+	},
+	{
+		.name = "y",
+		.attribute_offset = offsetof (LsmSvgTspanElement, y),
+		.trait_class = &lsm_svg_length_trait_class,
+		.trait_default = &length_default
+	}
+};
+
+static void
+lsm_svg_tspan_element_class_init (LsmSvgTspanElementClass *s_tspan_class)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (s_tspan_class);
+	LsmDomNodeClass *d_node_class = LSM_DOM_NODE_CLASS (s_tspan_class);
+	LsmSvgElementClass *s_element_class = LSM_SVG_ELEMENT_CLASS (s_tspan_class);
+
+	parent_class = g_type_class_peek_parent (s_tspan_class);
+
+	object_class->finalize = lsm_svg_tspan_element_finalize;
+
+	d_node_class->get_node_name = lsm_svg_tspan_element_get_node_name;
+	d_node_class->can_append_child = lsm_svg_tspan_element_can_append_child;
+
+	s_element_class->render = lsm_svg_tspan_element_render;
+	s_element_class->attribute_manager = lsm_attribute_manager_duplicate (s_element_class->attribute_manager);
+
+	lsm_attribute_manager_add_attributes (s_element_class->attribute_manager,
+					      G_N_ELEMENTS (lsm_svg_tspan_element_attribute_infos),
+					      lsm_svg_tspan_element_attribute_infos);
+}
+
+G_DEFINE_TYPE (LsmSvgTspanElement, lsm_svg_tspan_element, LSM_TYPE_SVG_ELEMENT)
diff --git a/src/lsmsvgtspanelement.h b/src/lsmsvgtspanelement.h
new file mode 100644
index 0000000..a913feb
--- /dev/null
+++ b/src/lsmsvgtspanelement.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright © 2009 Emmanuel Pacaud
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author:
+ * 	Emmanuel Pacaud <emmanuel gnome org>
+ */
+
+#ifndef LSM_SVG_TSPAN_ELEMENT_H
+#define LSM_SVG_TSPAN_ELEMENT_H
+
+#include <lsmsvg.h>
+#include <lsmsvgelement.h>
+
+G_BEGIN_DECLS
+
+#define LSM_TYPE_SVG_TSPAN_ELEMENT             (lsm_svg_tspan_element_get_type ())
+#define LSM_SVG_TSPAN_ELEMENT(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), LSM_TYPE_SVG_TSPAN_ELEMENT, LsmSvgTspanElement))
+#define LSM_SVG_TSPAN_ELEMENT_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), LSM_TYPE_SVG_TSPAN_ELEMENT, LsmSvgTspanElementClass))
+#define LSM_IS_SVG_TSPAN_ELEMENT(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LSM_TYPE_SVG_TSPAN_ELEMENT))
+#define LSM_IS_SVG_TSPAN_ELEMENT_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), LSM_TYPE_SVG_TSPAN_ELEMENT))
+#define LSM_SVG_TSPAN_ELEMENT_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), LSM_TYPE_SVG_TSPAN_ELEMENT, LsmSvgTspanElementClass))
+
+typedef struct _LsmSvgTspanElementClass LsmSvgTspanElementClass;
+
+struct _LsmSvgTspanElement {
+	LsmSvgElement element;
+
+	LsmSvgLengthAttribute	x;
+	LsmSvgLengthAttribute	y;
+};
+
+struct _LsmSvgTspanElementClass {
+	LsmSvgElementClass  element_class;
+};
+
+GType lsm_svg_tspan_element_get_type (void);
+
+LsmDomNode *		lsm_svg_tspan_element_new 		(void);
+
+G_END_DECLS
+
+#endif