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311 lines
10 KiB
JavaScript
311 lines
10 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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this.EXPORTED_SYMBOLS = [ "InlineSpellChecker" ];
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var gLanguageBundle;
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var gRegionBundle;
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const MAX_UNDO_STACK_DEPTH = 1;
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this.InlineSpellChecker = function InlineSpellChecker(aEditor) {
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this.init(aEditor);
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this.mAddedWordStack = []; // We init this here to preserve it between init/uninit calls
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}
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InlineSpellChecker.prototype = {
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// Call this function to initialize for a given editor
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init: function(aEditor)
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{
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this.uninit();
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this.mEditor = aEditor;
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try {
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this.mInlineSpellChecker = this.mEditor.getInlineSpellChecker(true);
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// note: this might have been NULL if there is no chance we can spellcheck
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} catch(e) {
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this.mInlineSpellChecker = null;
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}
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},
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// call this to clear state
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uninit: function()
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{
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this.mEditor = null;
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this.mInlineSpellChecker = null;
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this.mOverMisspelling = false;
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this.mMisspelling = "";
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this.mMenu = null;
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this.mSpellSuggestions = [];
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this.mSuggestionItems = [];
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this.mDictionaryMenu = null;
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this.mDictionaryNames = [];
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this.mDictionaryItems = [];
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this.mWordNode = null;
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},
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// for each UI event, you must call this function, it will compute the
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// word the cursor is over
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initFromEvent: function(rangeParent, rangeOffset)
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{
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this.mOverMisspelling = false;
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if (!rangeParent || !this.mInlineSpellChecker)
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return;
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var selcon = this.mEditor.selectionController;
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var spellsel = selcon.getSelection(selcon.SELECTION_SPELLCHECK);
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if (spellsel.rangeCount == 0)
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return; // easy case - no misspellings
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var range = this.mInlineSpellChecker.getMisspelledWord(rangeParent,
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rangeOffset);
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if (! range)
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return; // not over a misspelled word
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this.mMisspelling = range.toString();
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this.mOverMisspelling = true;
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this.mWordNode = rangeParent;
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this.mWordOffset = rangeOffset;
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},
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// returns false if there should be no spellchecking UI enabled at all, true
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// means that you can at least give the user the ability to turn it on.
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get canSpellCheck()
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{
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// inline spell checker objects will be created only if there are actual
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// dictionaries available
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return (this.mInlineSpellChecker != null);
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},
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// Whether spellchecking is enabled in the current box
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get enabled()
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{
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return (this.mInlineSpellChecker &&
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this.mInlineSpellChecker.enableRealTimeSpell);
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},
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set enabled(isEnabled)
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{
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if (this.mInlineSpellChecker)
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this.mEditor.setSpellcheckUserOverride(isEnabled);
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},
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// returns true if the given event is over a misspelled word
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get overMisspelling()
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{
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return this.mOverMisspelling;
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},
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// this prepends up to "maxNumber" suggestions at the given menu position
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// for the word under the cursor. Returns the number of suggestions inserted.
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addSuggestionsToMenu: function(menu, insertBefore, maxNumber)
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{
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if (! this.mInlineSpellChecker || ! this.mOverMisspelling)
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return 0; // nothing to do
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var spellchecker = this.mInlineSpellChecker.spellChecker;
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try {
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if (! spellchecker.CheckCurrentWord(this.mMisspelling))
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return 0; // word seems not misspelled after all (?)
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} catch(e) {
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return 0;
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}
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this.mMenu = menu;
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this.mSpellSuggestions = [];
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this.mSuggestionItems = [];
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for (var i = 0; i < maxNumber; i ++) {
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var suggestion = spellchecker.GetSuggestedWord();
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if (! suggestion.length)
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break;
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this.mSpellSuggestions.push(suggestion);
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var item = menu.ownerDocument.createElement("menuitem");
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this.mSuggestionItems.push(item);
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item.setAttribute("label", suggestion);
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item.setAttribute("value", suggestion);
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// this function thing is necessary to generate a callback with the
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// correct binding of "val" (the index in this loop).
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var callback = function(me, val) { return function(evt) { me.replaceMisspelling(val); } };
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item.addEventListener("command", callback(this, i), true);
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item.setAttribute("class", "spell-suggestion");
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menu.insertBefore(item, insertBefore);
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}
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return this.mSpellSuggestions.length;
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},
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// undoes the work of addSuggestionsToMenu for the same menu
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// (call from popup hiding)
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clearSuggestionsFromMenu: function()
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{
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for (var i = 0; i < this.mSuggestionItems.length; i ++) {
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this.mMenu.removeChild(this.mSuggestionItems[i]);
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}
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this.mSuggestionItems = [];
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},
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// returns the number of dictionary languages. If insertBefore is NULL, this
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// does an append to the given menu
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addDictionaryListToMenu: function(menu, insertBefore)
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{
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this.mDictionaryMenu = menu;
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this.mDictionaryNames = [];
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this.mDictionaryItems = [];
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if (! this.mInlineSpellChecker || ! this.enabled)
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return 0;
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var spellchecker = this.mInlineSpellChecker.spellChecker;
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var o1 = {}, o2 = {};
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spellchecker.GetDictionaryList(o1, o2);
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var list = o1.value;
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var listcount = o2.value;
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var curlang = "";
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try {
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curlang = spellchecker.GetCurrentDictionary();
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} catch(e) {}
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for (var i = 0; i < list.length; i ++) {
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this.mDictionaryNames.push(list[i]);
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var item = menu.ownerDocument.createElement("menuitem");
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item.setAttribute("id", "spell-check-dictionary-" + list[i]);
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item.setAttribute("label", this.getDictionaryDisplayName(list[i]));
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item.setAttribute("type", "radio");
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this.mDictionaryItems.push(item);
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if (curlang == list[i]) {
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item.setAttribute("checked", "true");
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} else {
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var callback = function(me, val) { return function(evt) { me.selectDictionary(val); } };
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item.addEventListener("command", callback(this, i), true);
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}
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if (insertBefore)
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menu.insertBefore(item, insertBefore);
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else
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menu.appendChild(item);
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}
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return list.length;
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},
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// Formats a valid BCP 47 language tag based on available localized names.
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getDictionaryDisplayName: function(dictionaryName) {
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try {
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// Get the display name for this dictionary.
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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;
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var [languageTag, languageSubtag, scriptSubtag, regionSubtag, variantSubtags] = dictionaryName.match(languageTagMatch);
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} catch(e) {
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// If we weren't given a valid language tag, just use the raw dictionary name.
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return dictionaryName;
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}
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if (!gLanguageBundle) {
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// Create the bundles for language and region names.
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var bundleService = Components.classes["@mozilla.org/intl/stringbundle;1"]
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.getService(Components.interfaces.nsIStringBundleService);
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gLanguageBundle = bundleService.createBundle(
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"chrome://global/locale/languageNames.properties");
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gRegionBundle = bundleService.createBundle(
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"chrome://global/locale/regionNames.properties");
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}
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var displayName = "";
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// Language subtag will normally be 2 or 3 letters, but could be up to 8.
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try {
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displayName += gLanguageBundle.GetStringFromName(languageSubtag.toLowerCase());
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} catch(e) {
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displayName += languageSubtag.toLowerCase(); // Fall back to raw language subtag.
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}
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// Region subtag will be 2 letters or 3 digits.
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if (regionSubtag) {
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displayName += " (";
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try {
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displayName += gRegionBundle.GetStringFromName(regionSubtag.toLowerCase());
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} catch(e) {
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displayName += regionSubtag.toUpperCase(); // Fall back to raw region subtag.
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}
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displayName += ")";
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}
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// Script subtag will be 4 letters.
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if (scriptSubtag) {
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displayName += " / ";
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// XXX: See bug 666662 and bug 666731 for full implementation.
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displayName += scriptSubtag; // Fall back to raw script subtag.
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}
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// Each variant subtag will be 4 to 8 chars.
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if (variantSubtags)
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// XXX: See bug 666662 and bug 666731 for full implementation.
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displayName += " (" + variantSubtags.substr(1).split(/[-_]/).join(" / ") + ")"; // Collapse multiple variants.
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return displayName;
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},
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// undoes the work of addDictionaryListToMenu for the menu
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// (call on popup hiding)
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clearDictionaryListFromMenu: function()
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{
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for (var i = 0; i < this.mDictionaryItems.length; i ++) {
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this.mDictionaryMenu.removeChild(this.mDictionaryItems[i]);
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}
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this.mDictionaryItems = [];
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},
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// callback for selecting a dictionary
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selectDictionary: function(index)
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{
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if (! this.mInlineSpellChecker || index < 0 || index >= this.mDictionaryNames.length)
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return;
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var spellchecker = this.mInlineSpellChecker.spellChecker;
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spellchecker.SetCurrentDictionary(this.mDictionaryNames[index]);
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this.mInlineSpellChecker.spellCheckRange(null); // causes recheck
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},
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// callback for selecting a suggesteed replacement
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replaceMisspelling: function(index)
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{
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if (! this.mInlineSpellChecker || ! this.mOverMisspelling)
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return;
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if (index < 0 || index >= this.mSpellSuggestions.length)
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return;
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this.mInlineSpellChecker.replaceWord(this.mWordNode, this.mWordOffset,
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this.mSpellSuggestions[index]);
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},
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// callback for enabling or disabling spellchecking
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toggleEnabled: function()
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{
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this.mEditor.setSpellcheckUserOverride(!this.mInlineSpellChecker.enableRealTimeSpell);
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},
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// callback for adding the current misspelling to the user-defined dictionary
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addToDictionary: function()
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{
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// Prevent the undo stack from growing over the max depth
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if (this.mAddedWordStack.length == MAX_UNDO_STACK_DEPTH)
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this.mAddedWordStack.shift();
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this.mAddedWordStack.push(this.mMisspelling);
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this.mInlineSpellChecker.addWordToDictionary(this.mMisspelling);
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},
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// callback for removing the last added word to the dictionary LIFO fashion
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undoAddToDictionary: function()
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{
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if (this.mAddedWordStack.length > 0)
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{
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var word = this.mAddedWordStack.pop();
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this.mInlineSpellChecker.removeWordFromDictionary(word);
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}
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},
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canUndo : function()
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{
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// Return true if we have words on the stack
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return (this.mAddedWordStack.length > 0);
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},
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ignoreWord: function()
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{
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this.mInlineSpellChecker.ignoreWord(this.mMisspelling);
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}
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};
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