gecko/toolkit/content/InlineSpellChecker.jsm

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2012-05-21 04:12:37 -07:00
/* 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 EXPORTED_SYMBOLS = [ "InlineSpellChecker" ];
var gLanguageBundle;
var gRegionBundle;
const MAX_UNDO_STACK_DEPTH = 1;
function InlineSpellChecker(aEditor) {
this.init(aEditor);
this.mAddedWordStack = []; // We init this here to preserve it between init/uninit calls
}
InlineSpellChecker.prototype = {
// Call this function to initialize for a given editor
init: function(aEditor)
{
this.uninit();
this.mEditor = aEditor;
try {
this.mInlineSpellChecker = this.mEditor.getInlineSpellChecker(true);
// note: this might have been NULL if there is no chance we can spellcheck
} catch(e) {
this.mInlineSpellChecker = null;
}
},
// call this to clear state
uninit: function()
{
this.mEditor = null;
this.mInlineSpellChecker = null;
this.mOverMisspelling = false;
this.mMisspelling = "";
this.mMenu = null;
this.mSpellSuggestions = [];
this.mSuggestionItems = [];
this.mDictionaryMenu = null;
this.mDictionaryNames = [];
this.mDictionaryItems = [];
this.mWordNode = null;
},
// for each UI event, you must call this function, it will compute the
// word the cursor is over
initFromEvent: function(rangeParent, rangeOffset)
{
this.mOverMisspelling = false;
if (!rangeParent || !this.mInlineSpellChecker)
return;
var selcon = this.mEditor.selectionController;
var spellsel = selcon.getSelection(selcon.SELECTION_SPELLCHECK);
if (spellsel.rangeCount == 0)
return; // easy case - no misspellings
var range = this.mInlineSpellChecker.getMisspelledWord(rangeParent,
rangeOffset);
if (! range)
return; // not over a misspelled word
this.mMisspelling = range.toString();
this.mOverMisspelling = true;
this.mWordNode = rangeParent;
this.mWordOffset = rangeOffset;
},
// returns false if there should be no spellchecking UI enabled at all, true
// means that you can at least give the user the ability to turn it on.
get canSpellCheck()
{
// inline spell checker objects will be created only if there are actual
// dictionaries available
return (this.mInlineSpellChecker != null);
},
// Whether spellchecking is enabled in the current box
get enabled()
{
return (this.mInlineSpellChecker &&
this.mInlineSpellChecker.enableRealTimeSpell);
},
set enabled(isEnabled)
{
if (this.mInlineSpellChecker)
this.mEditor.setSpellcheckUserOverride(isEnabled);
},
// returns true if the given event is over a misspelled word
get overMisspelling()
{
return this.mOverMisspelling;
},
// this prepends up to "maxNumber" suggestions at the given menu position
// for the word under the cursor. Returns the number of suggestions inserted.
addSuggestionsToMenu: function(menu, insertBefore, maxNumber)
{
if (! this.mInlineSpellChecker || ! this.mOverMisspelling)
return 0; // nothing to do
var spellchecker = this.mInlineSpellChecker.spellChecker;
try {
if (! spellchecker.CheckCurrentWord(this.mMisspelling))
return 0; // word seems not misspelled after all (?)
} catch(e) {
return 0;
}
this.mMenu = menu;
this.mSpellSuggestions = [];
this.mSuggestionItems = [];
for (var i = 0; i < maxNumber; i ++) {
var suggestion = spellchecker.GetSuggestedWord();
if (! suggestion.length)
break;
this.mSpellSuggestions.push(suggestion);
var item = menu.ownerDocument.createElement("menuitem");
this.mSuggestionItems.push(item);
item.setAttribute("label", suggestion);
item.setAttribute("value", suggestion);
// this function thing is necessary to generate a callback with the
// correct binding of "val" (the index in this loop).
var callback = function(me, val) { return function(evt) { me.replaceMisspelling(val); } };
item.addEventListener("command", callback(this, i), true);
item.setAttribute("class", "spell-suggestion");
menu.insertBefore(item, insertBefore);
}
return this.mSpellSuggestions.length;
},
// undoes the work of addSuggestionsToMenu for the same menu
// (call from popup hiding)
clearSuggestionsFromMenu: function()
{
for (var i = 0; i < this.mSuggestionItems.length; i ++) {
this.mMenu.removeChild(this.mSuggestionItems[i]);
}
this.mSuggestionItems = [];
},
// returns the number of dictionary languages. If insertBefore is NULL, this
// does an append to the given menu
addDictionaryListToMenu: function(menu, insertBefore)
{
this.mDictionaryMenu = menu;
this.mDictionaryNames = [];
this.mDictionaryItems = [];
if (! this.mInlineSpellChecker || ! this.enabled)
return 0;
var spellchecker = this.mInlineSpellChecker.spellChecker;
var o1 = {}, o2 = {};
spellchecker.GetDictionaryList(o1, o2);
var list = o1.value;
var listcount = o2.value;
var curlang = "";
try {
curlang = spellchecker.GetCurrentDictionary();
} catch(e) {}
for (var i = 0; i < list.length; i ++) {
this.mDictionaryNames.push(list[i]);
var item = menu.ownerDocument.createElement("menuitem");
item.setAttribute("id", "spell-check-dictionary-" + list[i]);
item.setAttribute("label", this.getDictionaryDisplayName(list[i]));
item.setAttribute("type", "radio");
this.mDictionaryItems.push(item);
if (curlang == list[i]) {
item.setAttribute("checked", "true");
} else {
var callback = function(me, val) { return function(evt) { me.selectDictionary(val); } };
item.addEventListener("command", callback(this, i), true);
}
if (insertBefore)
menu.insertBefore(item, insertBefore);
else
menu.appendChild(item);
}
return list.length;
},
// Formats a valid BCP 47 language tag based on available localized names.
getDictionaryDisplayName: function(dictionaryName) {
try {
// Get the display name for this dictionary.
let languageTagMatch = /^([a-z]{2,3}|[a-z]{4}|[a-z]{5,8})(?:[-_]([a-z]{4}))?(?:[-_]([A-Z]{2}|[0-9]{3}))?((?:[-_](?:[a-z0-9]{5,8}|[0-9][a-z0-9]{3}))*)(?:[-_][a-wy-z0-9](?:[-_][a-z0-9]{2,8})+)*(?:[-_]x(?:[-_][a-z0-9]{1,8})+)?$/i;
var [languageTag, languageSubtag, scriptSubtag, regionSubtag, variantSubtags] = dictionaryName.match(languageTagMatch);
} catch(e) {
// If we weren't given a valid language tag, just use the raw dictionary name.
return dictionaryName;
}
if (!gLanguageBundle) {
// Create the bundles for language and region names.
var bundleService = Components.classes["@mozilla.org/intl/stringbundle;1"]
.getService(Components.interfaces.nsIStringBundleService);
gLanguageBundle = bundleService.createBundle(
"chrome://global/locale/languageNames.properties");
gRegionBundle = bundleService.createBundle(
"chrome://global/locale/regionNames.properties");
}
var displayName = "";
// Language subtag will normally be 2 or 3 letters, but could be up to 8.
try {
displayName += gLanguageBundle.GetStringFromName(languageSubtag.toLowerCase());
} catch(e) {
displayName += languageSubtag.toLowerCase(); // Fall back to raw language subtag.
}
// Region subtag will be 2 letters or 3 digits.
if (regionSubtag) {
displayName += " (";
try {
displayName += gRegionBundle.GetStringFromName(regionSubtag.toLowerCase());
} catch(e) {
displayName += regionSubtag.toUpperCase(); // Fall back to raw region subtag.
}
displayName += ")";
}
// Script subtag will be 4 letters.
if (scriptSubtag) {
displayName += " / ";
// XXX: See bug 666662 and bug 666731 for full implementation.
displayName += scriptSubtag; // Fall back to raw script subtag.
}
// Each variant subtag will be 4 to 8 chars.
if (variantSubtags)
// XXX: See bug 666662 and bug 666731 for full implementation.
displayName += " (" + variantSubtags.substr(1).split(/[-_]/).join(" / ") + ")"; // Collapse multiple variants.
return displayName;
},
// undoes the work of addDictionaryListToMenu for the menu
// (call on popup hiding)
clearDictionaryListFromMenu: function()
{
for (var i = 0; i < this.mDictionaryItems.length; i ++) {
this.mDictionaryMenu.removeChild(this.mDictionaryItems[i]);
}
this.mDictionaryItems = [];
},
// callback for selecting a dictionary
selectDictionary: function(index)
{
if (! this.mInlineSpellChecker || index < 0 || index >= this.mDictionaryNames.length)
return;
var spellchecker = this.mInlineSpellChecker.spellChecker;
spellchecker.SetCurrentDictionary(this.mDictionaryNames[index]);
this.mInlineSpellChecker.spellCheckRange(null); // causes recheck
},
// callback for selecting a suggesteed replacement
replaceMisspelling: function(index)
{
if (! this.mInlineSpellChecker || ! this.mOverMisspelling)
return;
if (index < 0 || index >= this.mSpellSuggestions.length)
return;
this.mInlineSpellChecker.replaceWord(this.mWordNode, this.mWordOffset,
this.mSpellSuggestions[index]);
},
// callback for enabling or disabling spellchecking
toggleEnabled: function()
{
this.mEditor.setSpellcheckUserOverride(!this.mInlineSpellChecker.enableRealTimeSpell);
},
// callback for adding the current misspelling to the user-defined dictionary
addToDictionary: function()
{
// Prevent the undo stack from growing over the max depth
if (this.mAddedWordStack.length == MAX_UNDO_STACK_DEPTH)
this.mAddedWordStack.shift();
this.mAddedWordStack.push(this.mMisspelling);
this.mInlineSpellChecker.addWordToDictionary(this.mMisspelling);
},
// callback for removing the last added word to the dictionary LIFO fashion
undoAddToDictionary: function()
{
if (this.mAddedWordStack.length > 0)
{
var word = this.mAddedWordStack.pop();
this.mInlineSpellChecker.removeWordFromDictionary(word);
}
},
canUndo : function()
{
// Return true if we have words on the stack
return (this.mAddedWordStack.length > 0);
},
ignoreWord: function()
{
this.mInlineSpellChecker.ignoreWord(this.mMisspelling);
}
};