1 files changed, 126 insertions, 0 deletions
diff --git a/toolkit/mozapps/preferences/fontbuilder.js b/toolkit/mozapps/preferences/fontbuilder.js
new file mode 100644
index 000000000..a76ce6b25
--- /dev/null
+++ b/toolkit/mozapps/preferences/fontbuilder.js
@@ -0,0 +1,126 @@
+// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var FontBuilder = {
+  _enumerator: null,
+  get enumerator ()
+  {
+    if (!this._enumerator) {
+      this._enumerator = Components.classes["@mozilla.org/gfx/fontenumerator;1"]
+                                   .createInstance(Components.interfaces.nsIFontEnumerator);
+    }
+    return this._enumerator;
+  },
+
+  _allFonts: null,
+  _langGroupSupported: false,
+  buildFontList: function (aLanguage, aFontType, aMenuList)
+  {
+    // Reset the list
+    while (aMenuList.hasChildNodes())
+      aMenuList.removeChild(aMenuList.firstChild);
+
+    var defaultFont = null;
+    // Load Font Lists
+    var fonts = this.enumerator.EnumerateFonts(aLanguage, aFontType, { } );
+    if (fonts.length > 0)
+      defaultFont = this.enumerator.getDefaultFont(aLanguage, aFontType);
+    else {
+      fonts = this.enumerator.EnumerateFonts(aLanguage, "", { });
+      if (fonts.length > 0)
+        defaultFont = this.enumerator.getDefaultFont(aLanguage, "");
+    }
+
+    if (!this._allFonts)
+      this._allFonts = this.enumerator.EnumerateAllFonts({});
+
+    // Build the UI for the Default Font and Fonts for this CSS type.
+    var popup = document.createElement("menupopup");
+    var separator;
+    if (fonts.length > 0) {
+      if (defaultFont) {
+        var bundlePreferences = document.getElementById("bundlePreferences");
+        var label = bundlePreferences.getFormattedString("labelDefaultFont", [defaultFont]);
+        var menuitem = document.createElement("menuitem");
+        menuitem.setAttribute("label", label);
+        menuitem.setAttribute("value", ""); // Default Font has a blank value
+        popup.appendChild(menuitem);
+
+        separator = document.createElement("menuseparator");
+        popup.appendChild(separator);
+      }
+
+      for (var i = 0; i < fonts.length; ++i) {
+        menuitem = document.createElement("menuitem");
+        menuitem.setAttribute("value", fonts[i]);
+        menuitem.setAttribute("label", fonts[i]);
+        popup.appendChild(menuitem);
+      }
+    }
+
+    // Build the UI for the remaining fonts.
+    if (this._allFonts.length > fonts.length) {
+      this._langGroupSupported = true;
+      // Both lists are sorted, and the Fonts-By-Type list is a subset of the
+      // All-Fonts list, so walk both lists side-by-side, skipping values we've
+      // already created menu items for.
+      var builtItem = separator ? separator.nextSibling : popup.firstChild;
+      var builtItemValue = builtItem ? builtItem.getAttribute("value") : null;
+
+      separator = document.createElement("menuseparator");
+      popup.appendChild(separator);
+
+      for (i = 0; i < this._allFonts.length; ++i) {
+        if (this._allFonts[i] != builtItemValue) {
+          menuitem = document.createElement("menuitem");
+          menuitem.setAttribute("value", this._allFonts[i]);
+          menuitem.setAttribute("label", this._allFonts[i]);
+          popup.appendChild(menuitem);
+        }
+        else {
+          builtItem = builtItem.nextSibling;
+          builtItemValue = builtItem ? builtItem.getAttribute("value") : null;
+        }
+      }
+    }
+    aMenuList.appendChild(popup);
+  },
+
+  readFontSelection(aElement)
+  {
+    // Determine the appropriate value to select, for the following cases:
+    // - there is no setting
+    // - the font selected by the user is no longer present (e.g. deleted from
+    //   fonts folder)
+    let preference = document.getElementById(aElement.getAttribute("preference"));
+    if (preference.value) {
+      let fontItems = aElement.getElementsByAttribute("value", preference.value);
+
+      // There is a setting that actually is in the list. Respect it.
+      if (fontItems.length)
+        return undefined;
+    }
+
+    // The first item will be a reasonable choice only if the font backend
+    // supports language-specific enumaration.
+    let defaultValue = this._langGroupSupported ?
+                       aElement.firstChild.firstChild.getAttribute("value") : "";
+    let fontNameList = preference.name.replace(".name.", ".name-list.");
+    let prefFontNameList = document.getElementById(fontNameList);
+    if (!prefFontNameList || !prefFontNameList.value)
+      return defaultValue;
+
+    let fontNames = prefFontNameList.value.split(",");
+
+    for (let i = 0; i < fontNames.length; ++i) {
+      let fontName = this.enumerator.getStandardFamilyName(fontNames[i].trim());
+      let fontItems = aElement.getElementsByAttribute("value", fontName);
+      if (fontItems.length)
+        return fontItems[0].getAttribute("value");
+    }
+    return defaultValue;
+  }
+};