[gnome-shell] Implement "text-align"

[Florian Müllner <fmuellner src gnome org>]

commit 97f883b10eed82ec665d2aafe2cb42a4c893e2c1
Author: Giovanni Campagna <scampa giovanni gmail com>
Date:   Tue Jun 22 22:04:45 2010 +0200

    Implement "text-align"
    
    "text-align" allows setting the alignment of text, with respect to
    other lines and allocated space, without requiring a reference to
    the ClutterText (which is private for most widgets).
    If not specified, all text is left-aligned.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=622447

 data/theme/gnome-shell.css |    1 +
 js/ui/appDisplay.js        |    1 -
 src/st/st-private.c        |   10 +++++++++
 src/st/st-theme-node.c     |   47 ++++++++++++++++++++++++++++++++++++++++++++
 src/st/st-theme-node.h     |    9 ++++++++
 5 files changed, 67 insertions(+), 1 deletions(-)
---
diff --git a/data/theme/gnome-shell.css b/data/theme/gnome-shell.css
index 6669845..24ac579 100644
--- a/data/theme/gnome-shell.css
+++ b/data/theme/gnome-shell.css
@@ -553,6 +553,7 @@ StTooltip {
     height: 70px;
     font-size: 10px;
     transition-duration: 100;
+    text-align: center;
 }
 
 .app-well-app.running {
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index 98dfb2f..3a9e4c5 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -456,7 +456,6 @@ AppIcon.prototype = {
         box.add(this.icon, { expand: true, x_fill: false, y_fill: false });
 
         this._name = new St.Label({ text: this.app.get_name() });
-        this._name.clutter_text.line_alignment = Pango.Alignment.CENTER;
         box.add_actor(this._name);
     }
 };
diff --git a/src/st/st-private.c b/src/st/st-private.c
index 1ebadf6..248c703 100644
--- a/src/st/st-private.c
+++ b/src/st/st-private.c
@@ -280,6 +280,7 @@ _st_set_text_from_style (ClutterText *text,
   PangoAttrList *attribs;
   const PangoFontDescription *font;
   gchar *font_string;
+  StTextAlign align;
 
   st_theme_node_get_foreground_color (theme_node, &color);
   clutter_text_set_color (text, &color);
@@ -309,6 +310,15 @@ _st_set_text_from_style (ClutterText *text,
   clutter_text_set_attributes (text, attribs);
 
   pango_attr_list_unref (attribs);
+
+  align = st_theme_node_get_text_align (theme_node);
+  if(align == ST_TEXT_ALIGN_JUSTIFY) {
+    clutter_text_set_justify (text, TRUE);
+    clutter_text_set_line_alignment (text, PANGO_ALIGN_LEFT);
+  } else {
+    clutter_text_set_justify (text, FALSE);
+    clutter_text_set_line_alignment (text, (PangoAlignment) align);
+  }
 }
 
 gboolean
diff --git a/src/st/st-theme-node.c b/src/st/st-theme-node.c
index 08a9357..a9d33af 100644
--- a/src/st/st-theme-node.c
+++ b/src/st/st-theme-node.c
@@ -1761,6 +1761,53 @@ st_theme_node_get_text_decoration (StThemeNode *node)
   return 0;
 }
 
+StTextAlign
+st_theme_node_get_text_align(StThemeNode *node)
+{
+  int i;
+
+  ensure_properties(node);
+
+  for (i = node->n_properties - 1; i >= 0; i--)
+    {
+      CRDeclaration *decl = node->properties[i];
+
+      if (strcmp(decl->property->stryng->str, "text-align") == 0)
+        {
+          CRTerm *term = decl->value;
+
+          if (term->type != TERM_IDENT || term->next)
+            continue;
+
+          if (strcmp(term->content.str->stryng->str, "inherit") == 0)
+            {
+              if (node->parent_node)
+                return st_theme_node_get_text_align(node->parent_node);
+              return ST_TEXT_ALIGN_LEFT;
+            }
+          else if (strcmp(term->content.str->stryng->str, "left") == 0)
+            {
+              return ST_TEXT_ALIGN_LEFT;
+            }
+          else if (strcmp(term->content.str->stryng->str, "right") == 0)
+            {
+              return ST_TEXT_ALIGN_RIGHT;
+            }
+          else if (strcmp(term->content.str->stryng->str, "center") == 0)
+            {
+              return ST_TEXT_ALIGN_CENTER;
+            }
+          else if (strcmp(term->content.str->stryng->str, "justify") == 0)
+            {
+              return ST_TEXT_ALIGN_JUSTIFY;
+            }
+        }
+    }
+  if(node->parent_node)
+    return st_theme_node_get_text_align(node->parent_node);
+  return ST_TEXT_ALIGN_LEFT;
+}
+
 static gboolean
 font_family_from_terms (CRTerm *term,
                         char  **family)
diff --git a/src/st/st-theme-node.h b/src/st/st-theme-node.h
index dadff59..97f8e83 100644
--- a/src/st/st-theme-node.h
+++ b/src/st/st-theme-node.h
@@ -59,6 +59,13 @@ typedef enum {
 } StTextDecoration;
 
 typedef enum {
+    ST_TEXT_ALIGN_LEFT = PANGO_ALIGN_LEFT,
+    ST_TEXT_ALIGN_CENTER = PANGO_ALIGN_CENTER,
+    ST_TEXT_ALIGN_RIGHT = PANGO_ALIGN_RIGHT,
+    ST_TEXT_ALIGN_JUSTIFY
+} StTextAlign;
+
+typedef enum {
   ST_GRADIENT_NONE,
   ST_GRADIENT_VERTICAL,
   ST_GRADIENT_HORIZONTAL,
@@ -149,6 +156,8 @@ int    st_theme_node_get_transition_duration (StThemeNode *node);
 
 StTextDecoration st_theme_node_get_text_decoration (StThemeNode *node);
 
+StTextAlign st_theme_node_get_text_align (StThemeNode *node);
+
 /* Font rule processing is pretty complicated, so we just hardcode it
  * under the standard font/font-family/font-size/etc names. This means
  * you can't have multiple separate styled fonts for a single item,