test button aspect ratio instead of hardcoded button size, James feel free

2002-06-03  Havoc Pennington  <hp@pobox.com>

	* src/themes/Esco/metacity-theme-1.xml: test button aspect ratio
	instead of hardcoded button size, James feel free to revert if you
	don't like it this way.

	* src/theme-parser.c: parse the aspect_ratio element for button
	aspect ratios.

	* src/theme.h (struct _MetaFrameLayout): allow button sizes to be
	given as an aspect ratio derived from the titlebar height,
	instead of as a fixed size.

	* src/theme.c (meta_frame_layout_validate): validate new button
	sizing parameters

	* src/theme.c (meta_frame_layout_calc_geometry): use new button
	layout params

ChangeLog

@@ -1,3 +1,22 @@
+2002-06-03  Havoc Pennington  <hp@pobox.com>
+
+	* src/themes/Esco/metacity-theme-1.xml: test button aspect ratio
+	instead of hardcoded button size, James feel free to revert if you 
+	don't like it this way.
+
+	* src/theme-parser.c: parse the aspect_ratio element for button 
+	aspect ratios.
+
+	* src/theme.h (struct _MetaFrameLayout): allow button sizes to be 
+	given as an aspect ratio derived from the titlebar height, 
+	instead of as a fixed size.
+
+	* src/theme.c (meta_frame_layout_validate): validate new button
+	sizing parameters
+
+	* src/theme.c (meta_frame_layout_calc_geometry): use new button
+	layout params
+	
 Mon Jun  3 15:12:11 2002  HideToshi Tajima  <hidetoshi.tajima@sun.com>
 
 	* configure.in (METACITY_LIBS): put -lXext into SHAPE_LIBS

src/theme-parser.c

@@ -42,6 +42,7 @@ typedef enum
   STATE_FRAME_GEOMETRY,
   STATE_DISTANCE,
   STATE_BORDER,
+  STATE_ASPECT_RATIO,
   /* draw ops */
   STATE_DRAW_OPS,
   STATE_LINE,
@@ -1309,9 +1310,92 @@ parse_distance (GMarkupParseContext  *context,
   else if (strcmp (name, "left_titlebar_edge") == 0)
     info->layout->left_titlebar_edge = val;
   else if (strcmp (name, "button_width") == 0)
+    {
       info->layout->button_width = val;
+            
+      if (!(info->layout->button_sizing == META_BUTTON_SIZING_LAST ||
+            info->layout->button_sizing == META_BUTTON_SIZING_FIXED))
+        {
+          set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                     _("Cannot specify both button_width/button_height and aspect ratio for buttons"));
+          return;      
+        }
+
+      info->layout->button_sizing = META_BUTTON_SIZING_FIXED;
+    }
   else if (strcmp (name, "button_height") == 0)
+    {
       info->layout->button_height = val;
+      
+      if (!(info->layout->button_sizing == META_BUTTON_SIZING_LAST ||
+            info->layout->button_sizing == META_BUTTON_SIZING_FIXED))
+        {
+          set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                     _("Cannot specify both button_width/button_height and aspect ratio for buttons"));
+          return;      
+        }
+
+      info->layout->button_sizing = META_BUTTON_SIZING_FIXED;
+    }
+  else
+    {
+      set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                 _("Distance \"%s\" is unknown"), name);
+      return;
+    }
+}
+
+static void
+parse_aspect_ratio (GMarkupParseContext  *context,
+                    const gchar          *element_name,
+                    const gchar         **attribute_names,
+                    const gchar         **attribute_values,
+                    ParseInfo            *info,
+                    GError              **error)
+{
+  const char *name;
+  const char *value;
+  double val;
+  
+  if (!locate_attributes (context, element_name, attribute_names, attribute_values,
+                          error,
+                          "name", &name, "value", &value,
+                          NULL))
+    return;
+
+  if (name == NULL)
+    {
+      set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                 _("No \"name\" attribute on element <%s>"), element_name);
+      return;
+    }
+
+  if (value == NULL)
+    {
+      set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                 _("No \"value\" attribute on element <%s>"), element_name);
+      return;
+    }
+
+  val = 0;
+  if (!parse_double (value, &val, context, error))
+    return;
+
+  g_assert (info->layout);
+  
+  if (strcmp (name, "button") == 0)
+    {
+      info->layout->button_aspect = val;
+
+      if (info->layout->button_sizing != META_BUTTON_SIZING_LAST)
+        {
+          set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
+                     _("Cannot specify both button_width/button_height and aspect ratio for buttons"));
+          return;
+        }
+      
+      info->layout->button_sizing = META_BUTTON_SIZING_ASPECT;
+    }
   else
     {
       set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
@@ -1446,6 +1530,14 @@ parse_geometry_element (GMarkupParseContext  *context,
                     info, error);
       push_state (info, STATE_BORDER);
     }
+  else if (ELEMENT_IS ("aspect_ratio"))
+    {
+      parse_aspect_ratio (context, element_name,
+                          attribute_names, attribute_values,
+                          info, error);
+
+      push_state (info, STATE_ASPECT_RATIO);
+    }
   else
     {
       set_error (error, context,
@@ -3535,8 +3627,9 @@ start_element_handler (GMarkupParseContext *context,
       break;
     case STATE_DISTANCE:
     case STATE_BORDER:
+    case STATE_ASPECT_RATIO:
       set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
-                 _("Element <%s> is not allowed inside a distance/border element"),
+                 _("Element <%s> is not allowed inside a distance/border/aspect_ratio element"),
                  element_name);
       break;
     case STATE_DRAW_OPS:
@@ -3687,6 +3780,10 @@ end_element_handler (GMarkupParseContext *context,
       pop_state (info);
       g_assert (peek_state (info) == STATE_FRAME_GEOMETRY);
       break;
+    case STATE_ASPECT_RATIO:
+      pop_state (info);
+      g_assert (peek_state (info) == STATE_FRAME_GEOMETRY);
+      break;
     case STATE_DRAW_OPS:
       {
         g_assert (info->op_list);
@@ -4007,6 +4104,9 @@ text_handler (GMarkupParseContext *context,
     case STATE_BORDER:
       NO_TEXT ("border");
       break;
+    case STATE_ASPECT_RATIO:
+      NO_TEXT ("aspect_ratio");
+      break;
     case STATE_DRAW_OPS:
       NO_TEXT ("draw_ops");
       break;

src/theme.c

@@ -330,6 +330,8 @@ meta_frame_layout_new  (void)
   layout->right_titlebar_edge = -1;
   layout->left_titlebar_edge = -1;
 
+  layout->button_sizing = META_BUTTON_SIZING_LAST;
+  layout->button_aspect = 1.0;
   layout->button_width = -1;
   layout->button_height = -1;
 
@@ -416,8 +418,30 @@ meta_frame_layout_validate (const MetaFrameLayout *layout,
   CHECK_GEOMETRY_VALUE (right_titlebar_edge);
   CHECK_GEOMETRY_VALUE (left_titlebar_edge);
 
+  switch (layout->button_sizing)
+    {
+    case META_BUTTON_SIZING_ASPECT:
+      if (layout->button_aspect < (0.1) ||
+          layout->button_aspect > (15.0))
+        {
+          g_set_error (error, META_THEME_ERROR,
+                       META_THEME_ERROR_FRAME_GEOMETRY,
+                       _("Button aspect ratio %g is not reasonable"),
+                       layout->button_aspect);
+          return FALSE;
+        }
+      break;
+    case META_BUTTON_SIZING_FIXED:
       CHECK_GEOMETRY_VALUE (button_width);
       CHECK_GEOMETRY_VALUE (button_height);
+      break;
+    case META_BUTTON_SIZING_LAST:
+      g_set_error (error, META_THEME_ERROR,
+                   META_THEME_ERROR_FRAME_GEOMETRY,
+                   _("Frame geometry does not specify size of buttons"));
+      return FALSE;
+      break;
+    }
 
   CHECK_GEOMETRY_BORDER (button_border);
 
@@ -517,6 +541,7 @@ meta_frame_layout_calc_geometry (const MetaFrameLayout *layout,
   int button_y;
   int title_right_edge;
   int width, height;
+  int button_width, button_height;
   
   meta_frame_layout_get_borders (layout, text_height,
                                  flags,
@@ -538,17 +563,35 @@ meta_frame_layout_calc_geometry (const MetaFrameLayout *layout,
 
   x = width - layout->right_titlebar_edge;
 
-  /* center buttons */
+  switch (layout->button_sizing)
+    {
+    case META_BUTTON_SIZING_ASPECT:
+      button_height = fgeom->top_height - layout->button_border.top - layout->button_border.bottom;
+      button_width = button_height / layout->button_aspect;
+      break;
+    case META_BUTTON_SIZING_FIXED:
+      button_width = layout->button_width;
+      button_height = layout->button_height;
+      break;
+    case META_BUTTON_SIZING_LAST:
+      g_assert_not_reached ();
+      /* gcc warnings */
+      button_width = -1;
+      button_height = -1;
+      break;
+    }
+
+  /* center buttons vertically */
   button_y = (fgeom->top_height -
-              (layout->button_height + layout->button_border.top + layout->button_border.bottom)) / 2 + layout->button_border.top;
+              (button_height + layout->button_border.top + layout->button_border.bottom)) / 2 + layout->button_border.top;
   
   if ((flags & META_FRAME_ALLOWS_DELETE) &&
       x >= 0)
     {
-      fgeom->close_rect.x = x - layout->button_border.right - layout->button_width;
+      fgeom->close_rect.x = x - layout->button_border.right - button_width;
       fgeom->close_rect.y = button_y;
-      fgeom->close_rect.width = layout->button_width;
+      fgeom->close_rect.width = button_width;
-      fgeom->close_rect.height = layout->button_height;
+      fgeom->close_rect.height = button_height;
 
       x = fgeom->close_rect.x - layout->button_border.left;
     }
@@ -563,10 +606,10 @@ meta_frame_layout_calc_geometry (const MetaFrameLayout *layout,
   if ((flags & META_FRAME_ALLOWS_MAXIMIZE) &&
       x >= 0)
     {
-      fgeom->max_rect.x = x - layout->button_border.right - layout->button_width;
+      fgeom->max_rect.x = x - layout->button_border.right - button_width;
       fgeom->max_rect.y = button_y;
-      fgeom->max_rect.width = layout->button_width;
+      fgeom->max_rect.width = button_width;
-      fgeom->max_rect.height = layout->button_height;
+      fgeom->max_rect.height = button_height;
 
       x = fgeom->max_rect.x - layout->button_border.left;
     }
@@ -581,10 +624,10 @@ meta_frame_layout_calc_geometry (const MetaFrameLayout *layout,
   if ((flags & META_FRAME_ALLOWS_MINIMIZE) &&
       x >= 0)
     {
-      fgeom->min_rect.x = x - layout->button_border.right - layout->button_width;
+      fgeom->min_rect.x = x - layout->button_border.right - button_width;
       fgeom->min_rect.y = button_y;
-      fgeom->min_rect.width = layout->button_width;
+      fgeom->min_rect.width = button_width;
-      fgeom->min_rect.height = layout->button_height;
+      fgeom->min_rect.height = button_height;
 
       x = fgeom->min_rect.x - layout->button_border.left;
     }
@@ -605,8 +648,8 @@ meta_frame_layout_calc_geometry (const MetaFrameLayout *layout,
     {
       fgeom->menu_rect.x = x + layout->button_border.left;
       fgeom->menu_rect.y = button_y;
-      fgeom->menu_rect.width = layout->button_width;
+      fgeom->menu_rect.width = button_width;
-      fgeom->menu_rect.height = layout->button_height;
+      fgeom->menu_rect.height = button_height;
 
       x = fgeom->menu_rect.x + fgeom->menu_rect.width + layout->button_border.right;
     }

src/theme.h

@@ -52,6 +52,12 @@ typedef enum
   META_THEME_ERROR_FAILED
 } MetaThemeError;
 
+typedef enum
+{
+  META_BUTTON_SIZING_ASPECT,
+  META_BUTTON_SIZING_FIXED,
+  META_BUTTON_SIZING_LAST
+} MetaButtonSizing;
 
 /* Parameters used to calculate the geometry of the frame */
 struct _MetaFrameLayout
@@ -74,6 +80,10 @@ struct _MetaFrameLayout
   int left_titlebar_edge;
   
   /* Size of buttons */
+  MetaButtonSizing button_sizing;
+
+  double button_aspect; /* height / width */
+  
   int button_width;
   int button_height;
 

src/themes/Esco/metacity-theme-1.xml

@@ -15,11 +15,10 @@
  	<distance name="bottom_height" value="5"/>
 	<distance name="left_titlebar_edge" value="5"/>
 	<distance name="right_titlebar_edge" value="5"/>
-	<distance name="button_width" value="16"/>
+        <aspect_ratio name="button" value="1.0"/>      
-	<distance name="button_height" value="16"/>
 	<distance name="title_vertical_pad" value="3"/>
 	<border name="title_border" left="3" right="3" top="4" bottom="3"/>
-	<border name="button_border" left="0" right="1" top="0" bottom="0"/>
+	<border name="button_border" left="0" right="1" top="4" bottom="3"/>
 </frame_geometry>
 
 <!-- strip borders off the normal geometry -->

theme-format.txt

@@ -27,6 +27,8 @@ Themes are in a simple XML-subset format.
   <distance name="right_titlebar_edge" value="6"/>
   <distance name="button_width" value="17"/>
   <distance name="button_height" value="17"/>
+  <!-- alternative to button_width button_height distances -->
+  <aspect_ratio name="button" value="1.0"/>
   <distance name="title_vertical_pad" value="4"/>
   <border name="title_border" left="3" right="12" top="4" bottom="3"/>
   <border name="button_border" left="0" right="0" top="1" bottom="1"/>