1 files changed, 120 insertions, 0 deletions
diff --git a/toolkit/mozapps/preferences/fontbuilder.js b/toolkit/mozapps/preferences/fontbuilder.js
new file mode 100644
index 0000000000..5e264bfa53
--- /dev/null
+++ b/toolkit/mozapps/preferences/fontbuilder.js
@@ -0,0 +1,120 @@
+// -*- 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/. */
+
+/* import-globals-from ../../content/preferencesBindings.js */
+
+var FontBuilder = {
+  _enumerator: null,
+  get enumerator() {
+    if (!this._enumerator) {
+      this._enumerator = Cc["@mozilla.org/gfx/fontenumerator;1"].createInstance(
+        Ci.nsIFontEnumerator
+      );
+    }
+    return this._enumerator;
+  },
+
+  _allFonts: null,
+  _langGroupSupported: false,
+  async buildFontList(aLanguage, aFontType, aMenuList) {
+    // Remove the original <menupopup>
+    if (aMenuList.menupopup) {
+      aMenuList.menupopup.remove();
+    }
+
+    let defaultFont = null;
+    // Load Font Lists
+    let fonts = await this.enumerator.EnumerateFontsAsync(aLanguage, aFontType);
+    if (fonts.length) {
+      defaultFont = this.enumerator.getDefaultFont(aLanguage, aFontType);
+    } else {
+      fonts = await this.enumerator.EnumerateFontsAsync(aLanguage, "");
+      if (fonts.length) {
+        defaultFont = this.enumerator.getDefaultFont(aLanguage, "");
+      }
+    }
+
+    if (!this._allFonts) {
+      this._allFonts = await this.enumerator.EnumerateAllFontsAsync({});
+    }
+
+    // Build the UI for the Default Font and Fonts for this CSS type.
+    const popup = document.createXULElement("menupopup");
+    let separator;
+    if (fonts.length) {
+      let menuitem = document.createXULElement("menuitem");
+      if (defaultFont) {
+        document.l10n.setAttributes(menuitem, "fonts-label-default", {
+          name: defaultFont,
+        });
+      } else {
+        document.l10n.setAttributes(menuitem, "fonts-label-default-unnamed");
+      }
+      menuitem.setAttribute("value", ""); // Default Font has a blank value
+      popup.appendChild(menuitem);
+
+      separator = document.createXULElement("menuseparator");
+      popup.appendChild(separator);
+
+      for (let font of fonts) {
+        menuitem = document.createXULElement("menuitem");
+        menuitem.setAttribute("value", font);
+        menuitem.setAttribute("label", font);
+        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.
+      let builtItem = separator ? separator.nextSibling : popup.firstChild;
+      let builtItemValue = builtItem ? builtItem.getAttribute("value") : null;
+
+      separator = document.createXULElement("menuseparator");
+      popup.appendChild(separator);
+
+      for (let font of this._allFonts) {
+        if (font != builtItemValue) {
+          const menuitem = document.createXULElement("menuitem");
+          menuitem.setAttribute("value", font);
+          menuitem.setAttribute("label", font);
+          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)
+    const preference = Preferences.get(aElement.getAttribute("preference"));
+    if (preference.value) {
+      const fontItems = aElement.getElementsByAttribute(
+        "value",
+        preference.value
+      );
+
+      // There is a setting that actually is in the list. Respect it.
+      if (fontItems.length) {
+        return undefined;
+      }
+    }
+
+    // Otherwise, use "default" font of current system which is computed
+    // with "font.name-list.*".  If "font.name.*" is empty string, it means
+    // "default".  So, return empty string in this case.
+    return "";
+  },
+};