////////////////////////////////////////////////////
// spellChecker.js
//
// spellChecker object
//
// This file is sourced on web pages that have a textarea object to evaluate
// for spelling. It includes the implementation for the spellCheckObject.
//
////////////////////////////////////////////////////


// constructor
function spellChecker( textObject ) {

// public properties - configurable
//this.popUpUrl = '/speller/spellchecker.html';// by FredCK
this.popUpUrl = 'fck_spellerpages/spellerpages/spellchecker.html';// by FredCK
this.popUpName = 'spellchecker';
//this.popUpProps = "menu=no,width=440,height=350,top=70,left=120,resizable=yes,status=yes";// by FredCK
this.popUpProps = null ;// by FredCK
//this.spellCheckScript = '/speller/server-scripts/spellchecker.php';// by FredCK
this.spellCheckScript = 'server-scripts/spellchecker.php';// by FredCK
//this.spellCheckScript = '/cgi-bin/spellchecker.pl';

// values used to keep track of what happened to a word
this.replWordFlag = "R";// single replace
this.ignrWordFlag = "I";// single ignore
this.replAllFlag = "RA";// replace all occurances
this.ignrAllFlag = "IA";// ignore all occurances
this.fromReplAll = "~RA";// an occurance of a "replace all" word
this.fromIgnrAll = "~IA";// an occurance of a "ignore all" word
// properties set at run time
this.wordFlags = new Array();
this.currentTextIndex = 0;
this.currentWordIndex = 0;
this.spellCheckerWin = null;
this.controlWin = null;
this.wordWin = null;
this.textArea = textObject;// deprecated
this.textInputs = arguments; 

// private methods
this._spellcheck = _spellcheck;
this._getSuggestions = _getSuggestions;
this._setAsIgnored = _setAsIgnored;
this._getTotalReplaced = _getTotalReplaced;
this._setWordText = _setWordText;
this._getFormInputs = _getFormInputs;

// public methods
this.openChecker = openChecker;
this.startCheck = startCheck;
this.checkTextBoxes = checkTextBoxes;
this.checkTextAreas = checkTextAreas;
this.spellCheckAll = spellCheckAll;
this.ignoreWord = ignoreWord;
this.ignoreAll = ignoreAll;
this.replaceWord = replaceWord;
this.replaceAll = replaceAll;
this.terminateSpell = terminateSpell;
this.undo = undo;

// set the current window's "speller" property to the instance of this class.
// this object can now be referenced by child windows/frames.
window.speller = this;
}

// call this method to check all text boxes (and only text boxes) in the HTML document
function checkTextBoxes() {
this.textInputs = this._getFormInputs( "^text$" );
this.openChecker();
}

// call this method to check all textareas (and only textareas ) in the HTML document
function checkTextAreas() {
this.textInputs = this._getFormInputs( "^textarea$" );
this.openChecker();
}

// call this method to check all text boxes and textareas in the HTML document
function spellCheckAll() {
this.textInputs = this._getFormInputs( "^text(area)?$" );
this.openChecker();
}

// call this method to check text boxe(s) and/or textarea(s) that were passed in to the
// object's constructor or to the textInputs property
function openChecker() {
this.spellCheckerWin = window.open( this.popUpUrl, this.popUpName, this.popUpProps );
if( !this.spellCheckerWin.opener ) {
this.spellCheckerWin.opener = window;
}
}

function startCheck( wordWindowObj, controlWindowObj ) {

// set properties from args
this.wordWin = wordWindowObj;
this.controlWin = controlWindowObj;

// reset properties
this.wordWin.resetForm();
this.controlWin.resetForm();
this.currentTextIndex = 0;
this.currentWordIndex = 0;
// initialize the flags to an array - one element for each text input
this.wordFlags = new Array( this.wordWin.textInputs.length );
// each element will be an array that keeps track of each word in the text
for( var i=0; i<this.wordFlags.length; i++ ) {
this.wordFlags[i] = [];
}

// start
this._spellcheck();

return true;
}

function ignoreWord() {
var wi = this.currentWordIndex;
var ti = this.currentTextIndex;
if( !this.wordWin ) {
alert( 'Error: Word frame not available.' );
return false;
}
if( !this.wordWin.getTextVal( ti, wi )) {
alert( 'Error: "Not in dictionary" text is missing.' );
return false;
}
// set as ignored
if( this._setAsIgnored( ti, wi, this.ignrWordFlag )) {
this.currentWordIndex++;
this._spellcheck();
}
}

function ignoreAll() {
var wi = this.currentWordIndex;
var ti = this.currentTextIndex;
if( !this.wordWin ) {
alert( 'Error: Word frame not available.' );
return false;
}
// get the word that is currently being evaluated.
var s_word_to_repl = this.wordWin.getTextVal( ti, wi );
if( !s_word_to_repl ) {
alert( 'Error: "Not in dictionary" text is missing' );
return false;
}

// set this word as an "ignore all" word. 
this._setAsIgnored( ti, wi, this.ignrAllFlag );

// loop through all the words after this word
for( var i = ti; i < this.wordWin.textInputs.length; i++ ) {
for( var j = 0; j < this.wordWin.totalWords( i ); j++ ) {
if(( i == ti && j > wi ) || i > ti ) {
// future word: set as "from ignore all" if
// 1) do not already have a flag and 
// 2) have the same value as current word
if(( this.wordWin.getTextVal( i, j ) == s_word_to_repl )
&& ( !this.wordFlags[i][j] )) {
this._setAsIgnored( i, j, this.fromIgnrAll );
}
}
}
}

// finally, move on
this.currentWordIndex++;
this._spellcheck();
}

function replaceWord() {
var wi = this.currentWordIndex;
var ti = this.currentTextIndex;
if( !this.wordWin ) {
alert( 'Error: Word frame not available.' );
return false;
}
if( !this.wordWin.getTextVal( ti, wi )) {
alert( 'Error: "Not in dictionary" text is missing' );
return false;
}
if( !this.controlWin.replacementText ) {
return;
}
var txt = this.controlWin.replacementText;
if( txt.value ) {
var newspell = new String( txt.value );
if( this._setWordText( ti, wi, newspell, this.replWordFlag )) {
this.currentWordIndex++;
this._spellcheck();
}
}
}

function replaceAll() {
var ti = this.currentTextIndex;
var wi = this.currentWordIndex;
if( !this.wordWin ) {
alert( 'Error: Word frame not available.' );
return false;
}
var s_word_to_repl = this.wordWin.getTextVal( ti, wi );
if( !s_word_to_repl ) {
alert( 'Error: "Not in dictionary" text is missing' );
return false;
}
var txt = this.controlWin.replacementText;
if( !txt.value ) return;
var newspell = new String( txt.value );

// set this word as a "replace all" word. 
this._setWordText( ti, wi, newspell, this.replAllFlag );

// loop through all the words after this word
for( var i = ti; i < this.wordWin.textInputs.length; i++ ) {
for( var j = 0; j < this.wordWin.totalWords( i ); j++ ) {
if(( i == ti && j > wi ) || i > ti ) {
// future word: set word text to s_word_to_repl if
// 1) do not already have a flag and 
// 2) have the same value as s_word_to_repl
if(( this.wordWin.getTextVal( i, j ) == s_word_to_repl )
&& ( !this.wordFlags[i][j] )) {
this._setWordText( i, j, newspell, this.fromReplAll );
}
}
}
}

// finally, move on
this.currentWordIndex++;
this._spellcheck();
}

function terminateSpell() {
// called when we have reached the end of the spell checking.
var msg = "";// by FredCK
var numrepl = this._getTotalReplaced();
if( numrepl == 0 ) {
// see if there were no misspellings to begin with
if( !this.wordWin ) {
msg = "";
} else {
if( this.wordWin.totalMisspellings() ) {
//msg += "No words changed.";// by FredCK
msg += FCKLang.DlgSpellNoChanges ;// by FredCK
} else {
//msg += "No misspellings found.";// by FredCK
msg += FCKLang.DlgSpellNoMispell ;// by FredCK
}
}
} else if( numrepl == 1 ) {
//msg += "One word changed.";// by FredCK
msg += FCKLang.DlgSpellOneChange ;// by FredCK
} else {
//msg += numrepl + " words changed.";// by FredCK
msg += FCKLang.DlgSpellManyChanges.replace( /%1/g, numrepl ) ;
}
if( msg ) {
//msg += "\n";// by FredCK
alert( msg );
}

if( numrepl > 0 ) {
// update the text field(s) on the opener window
for( var i = 0; i < this.textInputs.length; i++ ) {
// this.textArea.value = this.wordWin.text;
if( this.wordWin ) {
if( this.wordWin.textInputs[i] ) {
this.textInputs[i].value = this.wordWin.textInputs[i];
}
}
}
}

// return back to the calling window
//this.spellCheckerWin.close();// by FredCK
if ( typeof( this.OnFinished ) == 'function' )// by FredCK
this.OnFinished(numrepl) ;// by FredCK

return true;
}

function undo() {
// skip if this is the first word!
var ti = this.currentTextIndex;
var wi = this.currentWordIndex

if( this.wordWin.totalPreviousWords( ti, wi ) > 0 ) {
this.wordWin.removeFocus( ti, wi );

// go back to the last word index that was acted upon 
do {
// if the current word index is zero then reset the seed
if( this.currentWordIndex == 0 && this.currentTextIndex > 0 ) {
this.currentTextIndex--;
this.currentWordIndex = this.wordWin.totalWords( this.currentTextIndex )-1;
if( this.currentWordIndex < 0 ) this.currentWordIndex = 0;
} else {
if( this.currentWordIndex > 0 ) {
this.currentWordIndex--;
}
}
} while ( 
this.wordWin.totalWords( this.currentTextIndex ) == 0
|| this.wordFlags[this.currentTextIndex][this.currentWordIndex] == this.fromIgnrAll
|| this.wordFlags[this.currentTextIndex][this.currentWordIndex] == this.fromReplAll
); 

var text_idx = this.currentTextIndex;
var idx = this.currentWordIndex;
var preReplSpell = this.wordWin.originalSpellings[text_idx][idx];

// if we got back to the first word then set the Undo button back to disabled
if( this.wordWin.totalPreviousWords( text_idx, idx ) == 0 ) {
this.controlWin.disableUndo();
}

// examine what happened to this current word.
switch( this.wordFlags[text_idx][idx] ) {
// replace all: go through this and all the future occurances of the word 
// and revert them all to the original spelling and clear their flags
case this.replAllFlag :
for( var i = text_idx; i < this.wordWin.textInputs.length; i++ ) {
for( var j = 0; j < this.wordWin.totalWords( i ); j++ ) {
if(( i == text_idx && j >= idx ) || i > text_idx ) {
var origSpell = this.wordWin.originalSpellings[i][j];
if( origSpell == preReplSpell ) {
this._setWordText ( i, j, origSpell, undefined );
}
}
}
}
break;

// ignore all: go through all the future occurances of the word 
// and clear their flags
case this.ignrAllFlag :
for( var i = text_idx; i < this.wordWin.textInputs.length; i++ ) {
for( var j = 0; j < this.wordWin.totalWords( i ); j++ ) {
if(( i == text_idx && j >= idx ) || i > text_idx ) {
var origSpell = this.wordWin.originalSpellings[i][j];
if( origSpell == preReplSpell ) {
this.wordFlags[i][j] = undefined; 
}
}
}
}
break;

// replace: revert the word to its original spelling
case this.replWordFlag :
this._setWordText ( text_idx, idx, preReplSpell, undefined );
break;
}

// For all four cases, clear the wordFlag of this word. re-start the process
this.wordFlags[text_idx][idx] = undefined; 
this._spellcheck();
}
}

function _spellcheck() {
var ww = this.wordWin;

// check if this is the last word in the current text element
if( this.currentWordIndex == ww.totalWords( this.currentTextIndex) ) {
this.currentTextIndex++;
this.currentWordIndex = 0;
// keep going if we're not yet past the last text element
if( this.currentTextIndex < this.wordWin.textInputs.length ) {
this._spellcheck();
return;
} else {
this.terminateSpell();
return;
}
}

// if this is after the first one make sure the Undo button is enabled
if( this.currentWordIndex > 0 ) {
this.controlWin.enableUndo();
}

// skip the current word if it has already been worked on
if( this.wordFlags[this.currentTextIndex][this.currentWordIndex] ) {
// increment the global current word index and move on.
this.currentWordIndex++;
this._spellcheck();
} else {
var evalText = ww.getTextVal( this.currentTextIndex, this.currentWordIndex );
if( evalText ) {
this.controlWin.evaluatedText.value = evalText;
ww.setFocus( this.currentTextIndex, this.currentWordIndex );
this._getSuggestions( this.currentTextIndex, this.currentWordIndex );
}
}
}

function _getSuggestions( text_num, word_num ) {
this.controlWin.clearSuggestions();
// add suggestion in list for each suggested word.
// get the array of suggested words out of the
// three-dimensional array containing all suggestions.
var a_suggests = this.wordWin.suggestions[text_num][word_num];
if( a_suggests ) {
// got an array of suggestions.
for( var ii = 0; ii < a_suggests.length; ii++ ) {
this.controlWin.addSuggestion( a_suggests[ii] );
}
}
this.controlWin.selectDefaultSuggestion();
}

function _setAsIgnored( text_num, word_num, flag ) {
// set the UI
this.wordWin.removeFocus( text_num, word_num );
// do the bookkeeping
this.wordFlags[text_num][word_num] = flag;
return true;
}

function _getTotalReplaced() {
var i_replaced = 0;
for( var i = 0; i < this.wordFlags.length; i++ ) {
for( var j = 0; j < this.wordFlags[i].length; j++ ) {
if(( this.wordFlags[i][j] == this.replWordFlag )
|| ( this.wordFlags[i][j] == this.replAllFlag )
|| ( this.wordFlags[i][j] == this.fromReplAll )) {
i_replaced++;
}
}
}
return i_replaced;
}

function _setWordText( text_num, word_num, newText, flag ) {
// set the UI and form inputs
this.wordWin.setText( text_num, word_num, newText );
// keep track of what happened to this word:
this.wordFlags[text_num][word_num] = flag;
return true;
}

function _getFormInputs( inputPattern ) {
var inputs = new Array();
for( var i = 0; i < document.forms.length; i++ ) {
for( var j = 0; j < document.forms[i].elements.length; j++ ) {
if( document.forms[i].elements[j].type.match( inputPattern )) {
inputs[inputs.length] = document.forms[i].elements[j]; 
}
}
}
return inputs;
}

