gecko-dev/mail/components/preferences/fonts.js

# -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
# 
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
# 
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
# 
# The Original Code is the Thunderbird Preferences System.
# 
# The Initial Developer of the Original Code is Ben Goodger.
# Portions created by the Initial Developer are Copyright (C) 2005
# the Initial Developer. All Rights Reserved.
# 
# Contributor(s):
#   Scott MacGregor <mscott@mozilla.org>
# 
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
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# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
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# ***** END LICENSE BLOCK *****

const kDefaultFontType          = "font.default.%LANG%";
const kFontNameFmtSerif         = "font.name.serif.%LANG%";
const kFontNameFmtSansSerif     = "font.name.sans-serif.%LANG%";
const kFontNameFmtMonospace     = "font.name.monospace.%LANG%";
const kFontNameListFmtSerif     = "font.name-list.serif.%LANG%";
const kFontNameListFmtSansSerif = "font.name-list.sans-serif.%LANG%";
const kFontNameListFmtMonospace = "font.name-list.monospace.%LANG%";
const kFontSizeFmtVariable      = "font.size.variable.%LANG%";
const kFontSizeFmtFixed         = "font.size.fixed.%LANG%";
const kFontMinSizeFmt           = "font.minimum-size.%LANG%";

var gFontsDialog = {

  _selectLanguageGroup: function (aLanguageGroup)
  {
    var prefs = [{ format: kDefaultFontType,          type: "string", element: "defaultFontType", fonttype: null},
                 { format: kFontNameFmtSerif,         type: "unichar", element: "serif",      fonttype: "serif"       },
                 { format: kFontNameFmtSansSerif,     type: "unichar", element: "sans-serif", fonttype: "sans-serif"  },
                 { format: kFontNameFmtMonospace,     type: "unichar", element: "monospace",  fonttype: "monospace"   },
                 { format: kFontNameListFmtSerif,     type: "unichar", element: null,         fonttype: "serif"       },
                 { format: kFontNameListFmtSansSerif, type: "unichar", element: null,         fonttype: "sans-serif"  },
                 { format: kFontNameListFmtMonospace, type: "unichar", element: null,         fonttype: "monospace"   },
                 { format: kFontSizeFmtVariable,      type: "int",     element: "sizeVar",    fonttype: null          },
                 { format: kFontSizeFmtFixed,         type: "int",     element: "sizeMono",   fonttype: null          },
                 { format: kFontMinSizeFmt,           type: "int",     element: "minSize",    fonttype: null          }];
    var preferences = document.getElementById("fontPreferences");
    for (var i = 0; i < prefs.length; ++i) {
      var preference = document.getElementById(prefs[i].format.replace(/%LANG%/, aLanguageGroup));
      if (!preference) {
        preference = document.createElement("preference");
        var name = prefs[i].format.replace(/%LANG%/, aLanguageGroup);
        preference.id = name;
        preference.setAttribute("name", name);
        preference.setAttribute("type", prefs[i].type);
        preferences.appendChild(preference);
      }
      
      if (!prefs[i].element)
        continue;
        
      var element = document.getElementById(prefs[i].element);
      if (element) {
        element.setAttribute("preference", preference.id);
      
        if (prefs[i].fonttype)
          FontBuilder.buildFontList(aLanguageGroup, prefs[i].fonttype, element);

        preference.setElementValue(element);
      }
    }
  },

  readFontLanguageGroup: function ()
  {
    var languagePref = document.getElementById("font.language.group");
    this._selectLanguageGroup(languagePref.value);
    return undefined;
  },

  readFontSelection: function (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)
    var preference = document.getElementById(aElement.getAttribute("preference"));
    if (preference.value) {
      var fontItems = aElement.getElementsByAttribute("value", preference.value);
    
      // There is a setting that actually is in the list. Respect it.
      if (fontItems.length > 0)
        return undefined;
    }
    
    var defaultValue = aElement.firstChild.firstChild.getAttribute("value");
    var languagePref = document.getElementById("font.language.group");
    preference = document.getElementById("font.name-list." + aElement.id + "." + languagePref.value);
    if (!preference || !preference.hasUserValue)
      return defaultValue;
    
    var fontNames = preference.value.split(",");
    var stripWhitespace = /^\s*(.*)\s*$/;
    
    for (var i = 0; i < fontNames.length; ++i) {
      var fontName = fontNames[i].replace(stripWhitespace, "$1");
      fontItems = aElement.getElementsByAttribute("value", fontName);
      if (fontItems.length)
        break;
    }
    if (fontItems.length)
      return fontItems[0].getAttribute("value");
    return defaultValue;
  },
  
  readUseDocumentFonts: function ()
  {
    var preference = document.getElementById("browser.display.use_document_fonts");
    return preference.value == 1;
  },
  
  writeUseDocumentFonts: function ()
  {
    var useDocumentFonts = document.getElementById("useDocumentFonts");
    return useDocumentFonts.checked ? 1 : 0;
  },

  readScreenResolution: function ()
  {
    // Initialize the display names of the default values the first time
    // the preference is read. We can NOT do this in the init function since
    // that is called after preference loading. 
    var defaultResolution = document.getElementById("defaultResolution");
    if (defaultResolution.label == "") {
      var bundlePreferences = document.getElementById("bundlePreferences");
      var otherResolution = document.getElementById("otherResolution");
      otherResolution.label = bundlePreferences.getFormattedString("fontScalingResolutionFormat",
                                                                  [otherResolution.getAttribute("value")]);
      defaultResolution.label = bundlePreferences.getFormattedString("fontScalingResolutionFormat",
                                                                    [defaultResolution.getAttribute("value")]);
    }
    return undefined;
  },

  changeScreenResolution: function (aMenulist)
  {
    var userResolution = document.getElementById("userResolution");
    var screenResolution = document.getElementById("screenResolution");
    var lastSelected = screenResolution.getElementsByAttribute("lastSelected", "true")
    if (lastSelected.length > 0) 
      lastSelected = lastSelected[0];
    else {
      var preference = document.getElementById("browser.display.screen_resolution");
      lastSelected = screenResolution.getElementsByAttribute("value", preference.value);
      if (lastSelected.length > 0)
        lastSelected = lastSelected[0];
      else
        lastSelected = document.getElementById("defaultResolution");
    }

    if (aMenulist.selectedItem.value == "choose") {
      var rv = { newdpi: -1 };
      document.documentElement.openSubDialog("chrome://mozapps/content/preferences/fontscaling.xul",
                                             "", rv);
      if (rv.newdpi != -1) {
        this._setResolution(rv.newdpi);
        lastSelected.removeAttribute("lastSelected");
        screenResolution.selectedItem.setAttribute("lastSelected", "true");
      }
      else
        screenResolution.selectedItem = lastSelected;
    }
    else if (!(screenResolution.value == userResolution.value)) {
      // User has selected one of the hard-coded resolutions
      userResolution.hidden = true;
      lastSelected.removeAttribute("lastSelected");
      screenResolution.selectedItem.setAttribute("lastSelected", "true");
    }
  },

  _setResolution: function (aResolution)
  {
    // Given a number, if it's equal to a hard-coded resolution we use that,
    // otherwise we set the userResolution field.
    var screenResolution = document.getElementById("screenResolution");
    var userResolution = document.getElementById("userResolution");

    var items = screenResolution.getElementsByAttribute("value", aResolution);
    if (items[0]) {
      // If it's one of the hard-coded values, we'll select it directly 
      screenResolution.selectedItem = items[0];
      userResolution.hidden = true;
    }   
    else {
      // Otherwise we need to set up the userResolution field
      var bundlePreferences = document.getElementById("bundlePreferences");
      var label = bundlePreferences.getFormattedString("fontScalingResolutionFormat", 
                                                       [aResolution]);
      userResolution.value = aResolution;
      userResolution.label = label;
      userResolution.hidden = false;
      screenResolution.selectedItem = userResolution;
    }
  }
};