implement wacky "tile" draw op to lose some of the PNG files in Gorilla

2002-02-09  Havoc Pennington  <hp@pobox.com>

	* src/theme.c (meta_draw_op_draw_with_env): implement wacky "tile"
	draw op to lose some of the PNG files in Gorilla theme

	* src/theme-parser.c: parse the tile primitive

ChangeLog

@@ -1,3 +1,10 @@
+2002-02-09  Havoc Pennington  <hp@pobox.com>
+	
+	* src/theme.c (meta_draw_op_draw_with_env): implement wacky "tile"
+	draw op to lose some of the PNG files in Gorilla theme
+
+	* src/theme-parser.c: parse the tile primitive
+	
 2002-02-09  Havoc Pennington  <hp@pobox.com>
 
 	* src/window.c (update_icon): port to icon cache

src/theme-parser.c

@@ -57,6 +57,7 @@ typedef enum
   STATE_ICON,
   STATE_TITLE,
   STATE_INCLUDE, /* include another draw op list */
+  STATE_TILE,    /* tile another draw op list */
   /* sub-parts of gradient */
   STATE_COLOR,
   /* frame style */
@@ -2637,7 +2638,7 @@ parse_draw_op_element (GMarkupParseContext  *context,
       if (name == NULL)
         {
           set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
-                     _("No \"name\" attribute on element <%s>"), element_name);
+                     _("No \"%s\" attribute on element <%s>"), "name", element_name);
           return;
         }
 
@@ -2697,6 +2698,130 @@ parse_draw_op_element (GMarkupParseContext  *context,
 
       push_state (info, STATE_INCLUDE);
     }
+  else if (ELEMENT_IS ("tile"))
+    {
+      MetaDrawOp *op;
+      const char *name;
+      const char *x;
+      const char *y;
+      const char *width;
+      const char *height;
+      const char *tile_xoffset;
+      const char *tile_yoffset;
+      const char *tile_width;
+      const char *tile_height;
+      MetaDrawOpList *op_list;
+      
+      if (!locate_attributes (context, element_name, attribute_names, attribute_values,
+                              error,
+                              "x", &x, "y", &y,
+                              "width", &width, "height", &height,
+                              "name", &name,
+                              "tile_xoffset", &tile_xoffset,
+                              "tile_yoffset", &tile_yoffset,
+                              "tile_width", &tile_width,
+                              "tile_height", &tile_height,
+                              NULL))
+        return;
+
+      if (name == NULL)
+        {
+          set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                     _("No \"%s\" attribute on element <%s>"), "name", element_name);
+          return;
+        }
+
+      if (tile_width == NULL)
+        {
+          set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                     _("No \"%s\" attribute on element <%s>"), "tile_width", element_name);
+          return;
+        }
+
+      if (tile_height == NULL)
+        {
+          set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                     _("No \"%s\" attribute on element <%s>"), "tile_height", element_name);
+          return;
+        }
+
+      /* These default to 0 */
+      if (tile_xoffset && !check_expression (tile_xoffset, FALSE, info->theme, context, error))
+        return;
+
+      if (tile_yoffset && !check_expression (tile_xoffset, FALSE, info->theme, context, error))
+        return;
+      
+      /* x/y/width/height default to 0,0,width,height - should
+       * probably do this for all the draw ops
+       */
+      
+      if (x && !check_expression (x, FALSE, info->theme, context, error))
+        return;
+
+      if (y && !check_expression (y, FALSE, info->theme, context, error))
+        return;
+
+      if (width && !check_expression (width, FALSE, info->theme, context, error))
+        return;
+      
+      if (height && !check_expression (height, FALSE, info->theme, context, error))
+        return;
+
+      if (!check_expression (tile_width, FALSE, info->theme, context, error))
+        return;
+
+      if (!check_expression (tile_height, FALSE, info->theme, context, error))
+        return;
+      
+      op_list = meta_theme_lookup_draw_op_list (info->theme,
+                                                name);
+      if (op_list == NULL)
+        {
+          set_error (error, context, G_MARKUP_ERROR,
+                     G_MARKUP_ERROR_PARSE,
+                     _("No <draw_ops> called \"%s\" has been defined"),
+                     name);
+          return;
+        }
+
+      g_assert (info->op_list);
+      
+      if (op_list == info->op_list ||
+          meta_draw_op_list_contains (op_list, info->op_list))
+        {
+          set_error (error, context, G_MARKUP_ERROR,
+                     G_MARKUP_ERROR_PARSE,
+                     _("Including draw_ops \"%s\" here would create a circular reference"),
+                     name);
+          return;
+        }
+      
+      op = meta_draw_op_new (META_DRAW_TILE);
+
+      meta_draw_op_list_ref (op_list);
+      op->data.tile.op_list = op_list;      
+      op->data.tile.x = x ? optimize_expression (info->theme, x) :
+        g_strdup ("0");
+      op->data.tile.y = y ? optimize_expression (info->theme, y) :
+        g_strdup ("0");
+      op->data.tile.width = width ? optimize_expression (info->theme, width) :
+        g_strdup ("width");
+      op->data.tile.height = height ?  optimize_expression (info->theme, height) :
+        g_strdup ("height");
+      op->data.tile.tile_xoffset = tile_xoffset ?
+        optimize_expression (info->theme, tile_xoffset) :
+        g_strdup ("0");
+      op->data.tile.tile_yoffset = tile_yoffset ?
+        optimize_expression (info->theme, tile_yoffset) :
+        g_strdup ("0");
+      op->data.tile.tile_width = optimize_expression (info->theme, tile_width);
+      op->data.tile.tile_height = optimize_expression (info->theme, tile_height);
+      
+      meta_draw_op_list_append (info->op_list, op);
+
+      push_state (info, STATE_TILE);
+    }
   else
     {
       set_error (error, context,
@@ -3292,6 +3417,7 @@ start_element_handler (GMarkupParseContext *context,
     case STATE_ICON:
     case STATE_TITLE:
     case STATE_INCLUDE:
+    case STATE_TILE:
       set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
                  _("Element <%s> is not allowed inside a draw operation element"),
                  element_name);
@@ -3525,6 +3651,10 @@ end_element_handler (GMarkupParseContext *context,
       pop_state (info);
       g_assert (peek_state (info) == STATE_DRAW_OPS);
       break;
+    case STATE_TILE:
+      pop_state (info);
+      g_assert (peek_state (info) == STATE_DRAW_OPS);
+      break;
     case STATE_COLOR:
       pop_state (info);
       g_assert (peek_state (info) == STATE_GRADIENT);
@@ -3780,6 +3910,9 @@ text_handler (GMarkupParseContext *context,
     case STATE_INCLUDE:
       NO_TEXT ("include");
       break;
+    case STATE_TILE:
+      NO_TEXT ("tile");
+      break;
     case STATE_COLOR:
       NO_TEXT ("color");
       break;

src/theme.c

@@ -2285,6 +2285,9 @@ meta_draw_op_new (MetaDrawType type)
     case META_DRAW_OP_LIST:
       size += sizeof (dummy.data.op_list);
       break;
+    case META_DRAW_TILE:
+      size += sizeof (dummy.data.tile);
+      break;
     }
 
   op = g_malloc0 (size);
@@ -2400,6 +2403,7 @@ meta_draw_op_free (MetaDrawOp *op)
       g_free (op->data.title.x);
       g_free (op->data.title.y);
       break;
+
     case META_DRAW_OP_LIST:
       if (op->data.op_list.op_list)
         meta_draw_op_list_unref (op->data.op_list.op_list);
@@ -2408,6 +2412,19 @@ meta_draw_op_free (MetaDrawOp *op)
       g_free (op->data.op_list.width);
       g_free (op->data.op_list.height);
       break;
+
+    case META_DRAW_TILE:
+      if (op->data.tile.op_list)
+        meta_draw_op_list_unref (op->data.tile.op_list);
+      g_free (op->data.tile.x);
+      g_free (op->data.tile.y);
+      g_free (op->data.tile.width);
+      g_free (op->data.tile.height);
+      g_free (op->data.tile.tile_xoffset);
+      g_free (op->data.tile.tile_yoffset);
+      g_free (op->data.tile.tile_width);
+      g_free (op->data.tile.tile_height);
+      break;
     }
 
   g_free (op);
@@ -2720,7 +2737,10 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
       break;
 
     case META_DRAW_OP_LIST:
-      break;      
+      break;
+
+    case META_DRAW_TILE:
+      break;
     }
 
   return pixbuf;
@@ -3052,6 +3072,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
           g_object_unref (G_OBJECT (gc));
         }
       break;
+
     case META_DRAW_OP_LIST:
       {
         int rx, ry, rwidth, rheight;
@@ -3066,6 +3087,55 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
                                 rx, ry, rwidth, rheight);
       }
       break;
+
+    case META_DRAW_TILE:
+      {
+        int rx, ry, rwidth, rheight;
+        int tile_xoffset, tile_yoffset, tile_width, tile_height;
+        GdkRectangle new_clip;
+        int tile_x, tile_y;
+        
+        rx = parse_x_position_unchecked (op->data.tile.x, env);
+        ry = parse_y_position_unchecked (op->data.tile.y, env);
+        rwidth = parse_size_unchecked (op->data.tile.width, env);
+        rheight = parse_size_unchecked (op->data.tile.height, env);
+
+        new_clip.x = rx;
+        new_clip.y = ry;
+        new_clip.width = rwidth;
+        new_clip.height = rheight;
+
+        if (clip == NULL || gdk_rectangle_intersect ((GdkRectangle*)clip, &new_clip,
+                                                     &new_clip))
+          {
+            tile_xoffset = parse_x_position_unchecked (op->data.tile.tile_xoffset, env);
+            tile_yoffset = parse_y_position_unchecked (op->data.tile.tile_yoffset, env);
+            /* tile offset should not include x/y */
+            tile_xoffset -= x;
+            tile_yoffset -= y;
+            
+            tile_width = parse_size_unchecked (op->data.tile.tile_width, env);
+            tile_height = parse_size_unchecked (op->data.tile.tile_height, env);
+
+            tile_x = rx - tile_xoffset;
+        
+            while (tile_x < (rx + rwidth))
+              {
+                tile_y = ry - tile_yoffset;
+                while (tile_y < (ry + rheight))
+                  {
+                    meta_draw_op_list_draw (op->data.tile.op_list,
+                                            widget, drawable, &new_clip, info,
+                                            tile_x, tile_y, tile_width, tile_height);     
+
+                    tile_y += tile_height;
+                  }
+
+                tile_x += tile_width;
+              }
+          }
+      }
+      break;
     }
 }
 
@@ -3260,6 +3330,15 @@ meta_draw_op_list_contains (MetaDrawOpList    *op_list,
                                           child))
             return TRUE;
         }
+      else if (op_list->ops[i]->type == META_DRAW_TILE)
+        {
+          if (op_list->ops[i]->data.tile.op_list == child)
+            return TRUE;
+          
+          if (meta_draw_op_list_contains (op_list->ops[i]->data.tile.op_list,
+                                          child))
+            return TRUE;
+        }
       
       ++i;
     }

src/theme.h

@@ -192,7 +192,9 @@ typedef enum
   /* App's window title */
   META_DRAW_TITLE,
   /* a draw op list */
-  META_DRAW_OP_LIST
+  META_DRAW_OP_LIST,
+  /* tiled draw op list */
+  META_DRAW_TILE
 } MetaDrawType;
 
 struct _MetaDrawOp
@@ -318,6 +320,18 @@ struct _MetaDrawOp
       char *width;
       char *height;
     } op_list;
+
+    struct {
+      MetaDrawOpList *op_list;
+      char *x;
+      char *y;
+      char *width;
+      char *height;
+      char *tile_xoffset;
+      char *tile_yoffset;
+      char *tile_width;
+      char *tile_height;
+    } tile;
     
   } data;
 };

theme-format.txt

@@ -114,8 +114,11 @@ Themes are in a simple XML-subset format.
         x="10" y="30" width="width / 3" height="height / 4"/>
   <!-- window's title -->
   <title color="gtk:text[NORMAL]" x="20" y="30"/>
-  <!-- include another draw ops list -->
+  <!-- include another draw ops list; has optional x/y/width/height attrs -->
   <include name="some_other_draw_ops"/>
+  <!-- tile another draw ops list; has optional
+       x/y/width/height/tile_xoffset/tile_yoffset -->
+  <tile name="some_other_draw_ops" tile_width="10" tile_height="10"/>
 </draw_ops>
 
 <frame_style name="normal" geometry="normal">