[nautilus] editable-label: copy-paste code from GTK+ to sync drawing with GtkLabel

[Cosimo Cecchi <cosimoc src gnome org>]

commit ca9f8d8906b85a4f806d713030d02efc34fd7170
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Dec 6 17:25:50 2010 +0100

    editable-label: copy-paste code from GTK+ to sync drawing with GtkLabel

 eel/eel-editable-label.c |  214 +++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 213 insertions(+), 1 deletions(-)
---
diff --git a/eel/eel-editable-label.c b/eel/eel-editable-label.c
index 79d4fed..a042eaa 100644
--- a/eel/eel-editable-label.c
+++ b/eel/eel-editable-label.c
@@ -37,6 +37,215 @@
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
 
+
+/* copy-paste from gtk/gtkpango.c */
+#define GTK_TYPE_FILL_LAYOUT_RENDERER            (_gtk_fill_layout_renderer_get_type())
+#define GTK_FILL_LAYOUT_RENDERER(object)         (G_TYPE_CHECK_INSTANCE_CAST ((object), GTK_TYPE_FILL_LAYOUT_RENDERER, GtkFillLayoutRenderer))
+#define GTK_IS_FILL_LAYOUT_RENDERER(object)      (G_TYPE_CHECK_INSTANCE_TYPE ((object), GTK_TYPE_FILL_LAYOUT_RENDERER))
+#define GTK_FILL_LAYOUT_RENDERER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_FILL_LAYOUT_RENDERER, GtkFillLayoutRendererClass))
+#define GTK_IS_FILL_LAYOUT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_FILL_LAYOUT_RENDERER))
+#define GTK_FILL_LAYOUT_RENDERER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_FILL_LAYOUT_RENDERER, GtkFillLayoutRendererClass))
+
+typedef struct _GtkFillLayoutRenderer      GtkFillLayoutRenderer;
+typedef struct _GtkFillLayoutRendererClass GtkFillLayoutRendererClass;
+
+struct _GtkFillLayoutRenderer
+{
+  PangoRenderer parent_instance;
+
+  cairo_t *cr;
+};
+
+struct _GtkFillLayoutRendererClass
+{
+  PangoRendererClass parent_class;
+};
+
+static GType _gtk_fill_layout_renderer_get_type (void);
+G_DEFINE_TYPE (GtkFillLayoutRenderer, _gtk_fill_layout_renderer, PANGO_TYPE_RENDERER)
+
+static void
+gtk_fill_layout_renderer_draw_glyphs (PangoRenderer     *renderer,
+                                      PangoFont         *font,
+                                      PangoGlyphString  *glyphs,
+                                      int                x,
+                                      int                y)
+{
+  GtkFillLayoutRenderer *text_renderer = GTK_FILL_LAYOUT_RENDERER (renderer);
+
+  cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
+  pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs);
+}
+
+static void
+gtk_fill_layout_renderer_draw_glyph_item (PangoRenderer     *renderer,
+                                          const char        *text,
+                                          PangoGlyphItem    *glyph_item,
+                                          int                x,
+                                          int                y)
+{
+  GtkFillLayoutRenderer *text_renderer = GTK_FILL_LAYOUT_RENDERER (renderer);
+
+  cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
+  pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item);
+}
+
+static void
+gtk_fill_layout_renderer_draw_rectangle (PangoRenderer     *renderer,
+                                         PangoRenderPart    part,
+                                         int                x,
+                                         int                y,
+                                         int                width,
+                                         int                height)
+{
+  GtkFillLayoutRenderer *text_renderer = GTK_FILL_LAYOUT_RENDERER (renderer);
+
+  if (part == PANGO_RENDER_PART_BACKGROUND)
+    return;
+
+  cairo_rectangle (text_renderer->cr,
+                   (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+		   (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+  cairo_fill (text_renderer->cr);
+}
+
+static void
+gtk_fill_layout_renderer_draw_trapezoid (PangoRenderer     *renderer,
+                                         PangoRenderPart    part,
+                                         double             y1_,
+                                         double             x11,
+                                         double             x21,
+                                         double             y2,
+                                         double             x12,
+                                         double             x22)
+{
+  GtkFillLayoutRenderer *text_renderer = GTK_FILL_LAYOUT_RENDERER (renderer);
+  cairo_matrix_t matrix;
+  cairo_t *cr;
+
+  cr = text_renderer->cr;
+
+  cairo_save (cr);
+
+  /* use identity scale, but keep translation */
+  cairo_get_matrix (cr, &matrix);
+  matrix.xx = matrix.yy = 1;
+  matrix.xy = matrix.yx = 0;
+  cairo_set_matrix (cr, &matrix);
+
+  cairo_move_to (cr, x11, y1_);
+  cairo_line_to (cr, x21, y1_);
+  cairo_line_to (cr, x22, y2);
+  cairo_line_to (cr, x12, y2);
+  cairo_close_path (cr);
+
+  cairo_fill (cr);
+
+  cairo_restore (cr);
+}
+
+static void
+gtk_fill_layout_renderer_draw_error_underline (PangoRenderer *renderer,
+                                               int            x,
+                                               int            y,
+                                               int            width,
+                                               int            height)
+{
+  GtkFillLayoutRenderer *text_renderer = GTK_FILL_LAYOUT_RENDERER (renderer);
+
+  pango_cairo_show_error_underline (text_renderer->cr,
+                                    (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+                                    (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+}
+
+static void
+gtk_fill_layout_renderer_draw_shape (PangoRenderer   *renderer,
+                                     PangoAttrShape  *attr,
+                                     int              x,
+                                     int              y)
+{
+  GtkFillLayoutRenderer *text_renderer = GTK_FILL_LAYOUT_RENDERER (renderer);
+  cairo_t *cr = text_renderer->cr;
+  PangoLayout *layout;
+  PangoCairoShapeRendererFunc shape_renderer;
+  gpointer                    shape_renderer_data;
+
+  layout = pango_renderer_get_layout (renderer);
+
+  if (!layout)
+  	return;
+
+  shape_renderer = pango_cairo_context_get_shape_renderer (pango_layout_get_context (layout),
+							   &shape_renderer_data);
+
+  if (!shape_renderer)
+    return;
+
+  cairo_save (cr);
+
+  cairo_move_to (cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
+
+  shape_renderer (cr, attr, FALSE, shape_renderer_data);
+
+  cairo_restore (cr);
+}
+
+static void
+gtk_fill_layout_renderer_finalize (GObject *object)
+{
+  G_OBJECT_CLASS (_gtk_fill_layout_renderer_parent_class)->finalize (object);
+}
+
+static void
+_gtk_fill_layout_renderer_init (GtkFillLayoutRenderer *renderer)
+{
+}
+
+static void
+_gtk_fill_layout_renderer_class_init (GtkFillLayoutRendererClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  
+  PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
+  
+  renderer_class->draw_glyphs = gtk_fill_layout_renderer_draw_glyphs;
+  renderer_class->draw_glyph_item = gtk_fill_layout_renderer_draw_glyph_item;
+  renderer_class->draw_rectangle = gtk_fill_layout_renderer_draw_rectangle;
+  renderer_class->draw_trapezoid = gtk_fill_layout_renderer_draw_trapezoid;
+  renderer_class->draw_error_underline = gtk_fill_layout_renderer_draw_error_underline;
+  renderer_class->draw_shape = gtk_fill_layout_renderer_draw_shape;
+
+  object_class->finalize = gtk_fill_layout_renderer_finalize;
+}
+
+static void
+_gtk_pango_fill_layout (cairo_t     *cr,
+                        PangoLayout *layout)
+{
+  static GtkFillLayoutRenderer *renderer = NULL;
+  gboolean has_current_point;
+  double current_x, current_y;
+
+  has_current_point = cairo_has_current_point (cr);
+  cairo_get_current_point (cr, &current_x, &current_y);
+
+  if (renderer == NULL)
+    renderer = g_object_new (GTK_TYPE_FILL_LAYOUT_RENDERER, NULL);
+
+  cairo_save (cr);
+  cairo_translate (cr, current_x, current_y);
+
+  renderer->cr = cr;
+  pango_renderer_draw_layout (PANGO_RENDERER (renderer), layout, 0, 0);
+
+  cairo_restore (cr);
+
+  if (has_current_point)
+    cairo_move_to (cr, current_x, current_y);
+}
+
+/* end copy-paste from gtkpango.c */
+
 enum {
   MOVE_CURSOR,
   POPULATE_POPUP,
@@ -1593,6 +1802,9 @@ eel_editable_label_draw (GtkWidget *widget,
                                                    x, y,
                                                    range,
                                                    1);
+
+          cairo_save (cr);
+
 	  gdk_cairo_region (cr, clip);
 	  cairo_clip (cr);
 
@@ -1607,7 +1819,7 @@ eel_editable_label_draw (GtkWidget *widget,
 
           cairo_save (cr);
           gdk_cairo_set_source_rgba (cr, &color);
-          gtk_render_layout (style, cr, x, y, label->layout);
+          _gtk_pango_fill_layout (cr, label->layout);
 
           cairo_restore (cr);