gecko-dev/toolkit/modules/InlineSpellChecker.jsm

594 строки
19 KiB
JavaScript
Исходник Обычный вид История

2012-05-21 15:12:37 +04:00
/* 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/. */
this.EXPORTED_SYMBOLS = [ "InlineSpellChecker",
"SpellCheckHelper" ];
var gLanguageBundle;
var gRegionBundle;
const MAX_UNDO_STACK_DEPTH = 1;
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
this.InlineSpellChecker = 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;
}
},
initFromRemote: function(aSpellInfo)
{
if (this.mRemote)
throw new Error("Unexpected state");
this.uninit();
if (!aSpellInfo)
return;
this.mInlineSpellChecker = this.mRemote = new RemoteSpellChecker(aSpellInfo);
this.mOverMisspelling = aSpellInfo.overMisspelling;
this.mMisspelling = aSpellInfo.misspelling;
},
// call this to clear state
uninit: function()
{
if (this.mRemote) {
this.mRemote.uninit();
this.mRemote = null;
}
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
if (this.mRemote)
return this.mRemote.canSpellCheck;
return this.mInlineSpellChecker != null;
},
get initialSpellCheckPending() {
if (this.mRemote) {
return this.mRemote.spellCheckPending;
}
return !!(this.mInlineSpellChecker &&
!this.mInlineSpellChecker.spellChecker &&
this.mInlineSpellChecker.spellCheckPending);
},
// Whether spellchecking is enabled in the current box
get enabled()
{
if (this.mRemote)
return this.mRemote.enableRealTimeSpell;
return (this.mInlineSpellChecker &&
this.mInlineSpellChecker.enableRealTimeSpell);
},
set enabled(isEnabled)
{
if (this.mRemote)
this.mRemote.setSpellcheckUserOverride(isEnabled);
else 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.mRemote && (!this.mInlineSpellChecker || !this.mOverMisspelling))
return 0; // nothing to do
var spellchecker = this.mRemote || this.mInlineSpellChecker.spellChecker;
try {
if (!this.mRemote && !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 = [];
},
sortDictionaryList: function(list) {
var sortedList = [];
for (var i = 0; i < list.length; i++) {
sortedList.push({"id": list[i],
"label": this.getDictionaryDisplayName(list[i])});
}
sortedList.sort(function(a, b) {
if (a.label < b.label)
return -1;
if (a.label > b.label)
return 1;
return 0;
});
return sortedList;
},
// 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.enabled)
return 0;
var list;
var curlang = "";
if (this.mRemote) {
list = this.mRemote.dictionaryList;
curlang = this.mRemote.currentDictionary;
}
else if (this.mInlineSpellChecker) {
var spellchecker = this.mInlineSpellChecker.spellChecker;
var o1 = {}, o2 = {};
spellchecker.GetDictionaryList(o1, o2);
list = o1.value;
var listcount = o2.value;
try {
curlang = spellchecker.GetCurrentDictionary();
} catch (e) {}
}
var sortedList = this.sortDictionaryList(list);
for (var i = 0; i < sortedList.length; i++) {
this.mDictionaryNames.push(sortedList[i].id);
var item = menu.ownerDocument.createElement("menuitem");
item.setAttribute("id", "spell-check-dictionary-" + sortedList[i].id);
item.setAttribute("label", sortedList[i].label);
item.setAttribute("type", "radio");
this.mDictionaryItems.push(item);
if (curlang == sortedList[i].id) {
item.setAttribute("checked", "true");
} else {
var callback = function(me, val, dictName) {
return function(evt) {
me.selectDictionary(val);
// Notify change of dictionary, especially for Thunderbird,
// which is otherwise not notified any more.
var view = menu.ownerDocument.defaultView;
var spellcheckChangeEvent = new view.CustomEvent(
"spellcheck-changed", {detail: { dictionary: dictName}});
menu.ownerDocument.dispatchEvent(spellcheckChangeEvent);
}
};
item.addEventListener("command", callback(this, i, sortedList[i].id), 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.mRemote) {
this.mRemote.selectDictionary(index);
return;
}
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 suggested replacement
replaceMisspelling: function(index)
{
if (this.mRemote) {
this.mRemote.replaceMisspelling(index);
return;
}
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()
{
if (this.mRemote)
this.mRemote.toggleEnabled();
else
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);
if (this.mRemote)
this.mRemote.addToDictionary();
else {
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();
if (this.mRemote)
this.mRemote.undoAddToDictionary(word);
else
this.mInlineSpellChecker.removeWordFromDictionary(word);
}
},
canUndo : function()
{
// Return true if we have words on the stack
return (this.mAddedWordStack.length > 0);
},
ignoreWord: function()
{
if (this.mRemote)
this.mRemote.ignoreWord();
else
this.mInlineSpellChecker.ignoreWord(this.mMisspelling);
}
};
var SpellCheckHelper = {
// Set when over a non-read-only <textarea> or editable <input>.
EDITABLE: 0x1,
// Set when over an <input> element of any type.
INPUT: 0x2,
// Set when over any <textarea>.
TEXTAREA: 0x4,
// Set when over any text-entry <input>.
TEXTINPUT: 0x8,
// Set when over an <input> that can be used as a keyword field.
KEYWORD: 0x10,
// Set when over an element that otherwise would not be considered
// "editable" but is because content editable is enabled for the document.
CONTENTEDITABLE: 0x20,
// Set when over an <input type="number"> or other non-text field.
NUMERIC: 0x40,
// Set when over an <input type="password"> field.
PASSWORD: 0x80,
isTargetAKeywordField(aNode, window) {
if (!(aNode instanceof window.HTMLInputElement))
return false;
var form = aNode.form;
if (!form || aNode.type == "password")
return false;
var method = form.method.toUpperCase();
// These are the following types of forms we can create keywords for:
//
// method encoding type can create keyword
// GET * YES
// * YES
// POST YES
// POST application/x-www-form-urlencoded YES
// POST text/plain NO (a little tricky to do)
// POST multipart/form-data NO
// POST everything else YES
return (method == "GET" || method == "") ||
(form.enctype != "text/plain") && (form.enctype != "multipart/form-data");
},
// Returns the computed style attribute for the given element.
getComputedStyle(aElem, aProp) {
return aElem.ownerDocument
.defaultView
.getComputedStyle(aElem, "").getPropertyValue(aProp);
},
isEditable(element, window) {
var flags = 0;
if (element instanceof window.HTMLInputElement) {
flags |= this.INPUT;
if (element.mozIsTextField(false) || element.type == "number") {
flags |= this.TEXTINPUT;
if (element.type == "number") {
flags |= this.NUMERIC;
}
// Allow spellchecking UI on all text and search inputs.
if (!element.readOnly &&
(element.type == "text" || element.type == "search")) {
flags |= this.EDITABLE;
}
if (this.isTargetAKeywordField(element, window))
flags |= this.KEYWORD;
if (element.type == "password") {
flags |= this.PASSWORD;
}
}
} else if (element instanceof window.HTMLTextAreaElement) {
flags |= this.TEXTINPUT | this.TEXTAREA;
if (!element.readOnly) {
flags |= this.EDITABLE;
}
}
if (!(flags & this.EDITABLE)) {
var win = element.ownerDocument.defaultView;
if (win) {
var isEditable = false;
try {
var editingSession = win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIEditingSession);
if (editingSession.windowIsEditable(win) &&
this.getComputedStyle(element, "-moz-user-modify") == "read-write") {
isEditable = true;
}
}
catch (ex) {
// If someone built with composer disabled, we can't get an editing session.
}
if (isEditable)
flags |= this.CONTENTEDITABLE;
}
}
return flags;
},
};
function RemoteSpellChecker(aSpellInfo) {
this._spellInfo = aSpellInfo;
this._suggestionGenerator = null;
}
RemoteSpellChecker.prototype = {
get canSpellCheck() { return this._spellInfo.canSpellCheck; },
get spellCheckPending() { return this._spellInfo.initialSpellCheckPending; },
get overMisspelling() { return this._spellInfo.overMisspelling; },
get enableRealTimeSpell() { return this._spellInfo.enableRealTimeSpell; },
GetSuggestedWord() {
if (!this._suggestionGenerator) {
this._suggestionGenerator = (function*(spellInfo) {
for (let i of spellInfo.spellSuggestions)
yield i;
})(this._spellInfo);
}
let next = this._suggestionGenerator.next();
if (next.done) {
this._suggestionGenerator = null;
return "";
}
return next.value;
},
get currentDictionary() { return this._spellInfo.currentDictionary },
get dictionaryList() { return this._spellInfo.dictionaryList.slice(); },
selectDictionary(index) {
this._spellInfo.target.sendAsyncMessage("InlineSpellChecker:selectDictionary",
{ index });
},
replaceMisspelling(index) {
this._spellInfo.target.sendAsyncMessage("InlineSpellChecker:replaceMisspelling",
{ index });
},
toggleEnabled() { this._spellInfo.target.sendAsyncMessage("InlineSpellChecker:toggleEnabled", {}); },
addToDictionary() {
// This is really ugly. There is an nsISpellChecker somewhere in the
// parent that corresponds to our current element's spell checker in the
// child, but it's hard to access it. However, we know that
// addToDictionary adds the word to the singleton personal dictionary, so
// we just do that here.
// NB: We also rely on the fact that we only ever pass an empty string in
// as the "lang".
let dictionary = Cc["@mozilla.org/spellchecker/personaldictionary;1"]
.getService(Ci.mozIPersonalDictionary);
dictionary.addWord(this._spellInfo.misspelling, "");
this._spellInfo.target.sendAsyncMessage("InlineSpellChecker:recheck", {});
},
undoAddToDictionary(word) {
let dictionary = Cc["@mozilla.org/spellchecker/personaldictionary;1"]
.getService(Ci.mozIPersonalDictionary);
dictionary.removeWord(word, "");
this._spellInfo.target.sendAsyncMessage("InlineSpellChecker:recheck", {});
},
ignoreWord() {
let dictionary = Cc["@mozilla.org/spellchecker/personaldictionary;1"]
.getService(Ci.mozIPersonalDictionary);
dictionary.ignoreWord(this._spellInfo.misspelling);
this._spellInfo.target.sendAsyncMessage("InlineSpellChecker:recheck", {});
},
uninit() { this._spellInfo.target.sendAsyncMessage("InlineSpellChecker:uninit", {}); }
};