[gtk+] entry: trim the progress bar area if the text area is resized

[Cosimo Cecchi <cosimoc src gnome org>]

commit 5f9c8f653daac7c7aa22fa6160771f7f899216bc
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Feb 20 11:28:36 2012 +0100

    entry: trim the progress bar area if the text area is resized
    
    When a subclass of GtkEntry (e.g. GtkSpinButton) resizes the available
    text area (by overriding the get_text_area_size vfunc), we need to
    ensure we don't draw a possible progressbar over the part that got
    removed from the text area.
    This fixes drawing a progressbar in GtkSpinButton and in its subclasses,
    such as GimpSpinScale, and makes Mitch happy too!

 gtk/gtkentry.c |   36 +++++++++++++++++++++++++++++++-----
 1 files changed, 31 insertions(+), 5 deletions(-)
---
diff --git a/gtk/gtkentry.c b/gtk/gtkentry.c
index 801dd96..0694a75 100644
--- a/gtk/gtkentry.c
+++ b/gtk/gtkentry.c
@@ -3523,21 +3523,47 @@ get_progress_area (GtkWidget *widget,
   GtkEntry *entry = GTK_ENTRY (widget);
   GtkEntryPrivate *private = entry->priv;
   GtkStyleContext *context;
-  GtkBorder margin;
+  GtkBorder margin, border, entry_borders;
+  gint frame_width, text_area_width, text_area_height;
+
+  context = gtk_widget_get_style_context (widget);
+  _gtk_entry_get_borders (entry, &entry_borders);
+  get_text_area_size (entry,
+                      NULL, NULL,
+                      &text_area_width, &text_area_height);
+  get_frame_size (entry, FALSE,
+                  NULL, NULL,
+                  &frame_width, NULL);
 
-  get_frame_size (GTK_ENTRY (widget), FALSE, NULL, NULL, width, height);
   *x = 0;
   *y = 0;
+  *width = text_area_width + entry_borders.left + entry_borders.right;
+  *height = text_area_height + entry_borders.top + entry_borders.bottom;
 
   if (!private->interior_focus)
     {
       *x -= private->focus_width;
       *y -= private->focus_width;
-      *width += 2 * private->focus_width;
-      *height += 2 * private->focus_width;
     }
 
-  context = gtk_widget_get_style_context (widget);
+  /* if the text area got resized by a subclass, subtract the left/right
+   * border width, so that the progress bar won't extend over the resized
+   * text area.
+   */
+  if (frame_width > *width)
+    {
+      gtk_style_context_get_border (context, 0, &border);
+      if (gtk_widget_get_direction (GTK_WIDGET (entry)) == GTK_TEXT_DIR_RTL)
+        {
+          *x = (frame_width - *width) + border.left;
+          *width -= border.left;
+        }
+      else
+        {
+          *width -= border.right;
+        }
+    }
+
   gtk_entry_prepare_context_for_progress (entry, context);
   gtk_style_context_get_margin (context, 0, &margin);