From b49fde35c93fc2277e4afac78f7ab1497b7bb381 Mon Sep 17 00:00:00 2001
From: James Bowes <jbowes@dangerouslyinc.com>
Date: Sat, 22 Mar 2008 13:52:06 -0400
Subject: [PATCH] implement TextFormat.getTextExtent

---
 swfdec/swfdec_as_strings.c  |    4 ++
 swfdec/swfdec_text_format.c |   74 ++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 77 insertions(+), 1 deletions(-)

diff --git a/swfdec/swfdec_as_strings.c b/swfdec/swfdec_as_strings.c
index 8e6cb9c..2170366 100644
--- a/swfdec/swfdec_as_strings.c
+++ b/swfdec/swfdec_as_strings.c
@@ -496,5 +496,9 @@ const char swfdec_as_strings[] =
   SWFDEC_AS_CONSTANT_STRING ("Selection")
   SWFDEC_AS_CONSTANT_STRING ("tabEnabled")
   SWFDEC_AS_CONSTANT_STRING ("focusEnabled")
+  SWFDEC_AS_CONSTANT_STRING ("ascent")
+  SWFDEC_AS_CONSTANT_STRING ("descent")
+  SWFDEC_AS_CONSTANT_STRING ("textFieldHeight")
+  SWFDEC_AS_CONSTANT_STRING ("textFieldWidth")
   /* add more here */
 ;
diff --git a/swfdec/swfdec_text_format.c b/swfdec/swfdec_text_format.c
index 79e82ee..288a5fd 100644
--- a/swfdec/swfdec_text_format.c
+++ b/swfdec/swfdec_text_format.c
@@ -24,6 +24,7 @@
 
 #include <math.h>
 #include <string.h>
+#include <pango/pangocairo.h>
 
 #include "swfdec_text_format.h"
 #include "swfdec_as_native_function.h"
@@ -852,7 +853,78 @@ static void
 swfdec_text_format_getTextExtent (SwfdecAsContext *cx, SwfdecAsObject *object,
     guint argc, SwfdecAsValue *argv, SwfdecAsValue *ret)
 {
-  SWFDEC_STUB ("TextFormat.getTextExtent");
+  SwfdecTextFormat *format;
+  SwfdecAsObject *obj = swfdec_as_object_new_empty (cx);
+  SwfdecAsValue val;
+  const gchar *text;
+  GList *item_list;
+  PangoAnalysis analysis;
+  PangoFontMap *fontmap;
+  PangoContext *pcontext;
+  PangoAttrList *attrs;
+  PangoGlyphString *glyph_string = pango_glyph_string_new();
+  PangoRectangle ink_rect;
+  PangoFontDescription *desc;
+  PangoFont *font;
+
+  g_return_if_fail (SWFDEC_IS_TEXT_FORMAT (object));
+
+  format = SWFDEC_TEXT_FORMAT (object);
+  swfdec_as_object_get_variable (object, SWFDEC_AS_STR_TextFormat, &val);
+  text =  swfdec_as_value_to_string(cx, &argv[0]);
+
+  fontmap = pango_cairo_font_map_get_default ();
+  pcontext =
+    pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap));
+
+  attrs = pango_attr_list_new ();
+  item_list = pango_itemize (pcontext, text, 0, strlen(text), attrs, NULL);
+  pango_attr_list_unref (attrs);
+
+  analysis = ((PangoItem *)(item_list[0].data))->analysis;
+  pango_shape (text, strlen(text), &analysis, glyph_string);
+
+  desc = pango_font_description_new ();
+  pango_font_description_set_family_static (desc, format->font);
+  pango_font_description_set_size (desc, format->size);
+  if (format->bold){
+    pango_font_description_set_weight (desc, PANGO_WEIGHT_BOLD);
+  }
+  if (format->italic)
+    pango_font_description_set_style (desc, PANGO_STYLE_ITALIC);
+
+  font = pango_font_map_load_font (fontmap, pcontext, desc);
+  pango_glyph_string_extents (glyph_string, font, &ink_rect, NULL);
+
+  pango_glyph_string_free (glyph_string);
+  g_list_foreach (item_list, (GFunc) pango_item_free, NULL);
+  g_list_free (item_list);
+  pango_font_description_free (desc);
+  g_object_unref (G_OBJECT (pcontext));
+  g_object_unref (G_OBJECT (fontmap));
+  g_object_unref (G_OBJECT (font));
+
+  SWFDEC_AS_VALUE_SET_INT (&val, ink_rect.width + format->left_margin +
+						   format->right_margin);
+  swfdec_as_object_set_variable (obj, SWFDEC_AS_STR_width, &val);
+
+  SWFDEC_AS_VALUE_SET_INT (&val, (ink_rect.height + format->leading));
+  swfdec_as_object_set_variable (obj, SWFDEC_AS_STR_height, &val);
+
+  SWFDEC_AS_VALUE_SET_INT (&val, PANGO_ASCENT(ink_rect));
+  swfdec_as_object_set_variable (obj, SWFDEC_AS_STR_ascent, &val);
+
+  SWFDEC_AS_VALUE_SET_INT (&val, PANGO_DESCENT (ink_rect));
+  swfdec_as_object_set_variable (obj, SWFDEC_AS_STR_descent, &val);
+
+  SWFDEC_AS_VALUE_SET_INT (&val, ink_rect.width + format->left_margin +
+						   format->right_margin + 4);
+  swfdec_as_object_set_variable (obj, SWFDEC_AS_STR_textFieldWidth, &val);
+
+  SWFDEC_AS_VALUE_SET_INT (&val, ink_rect.height + 4 + format->leading);
+  swfdec_as_object_set_variable (obj, SWFDEC_AS_STR_textFieldHeight, &val);
+
+  SWFDEC_AS_VALUE_SET_OBJECT (ret, obj);
 }
 
 void
-- 
1.5.5.rc2.155.gb0a67