--- /dev/null
+/**
+ * These plugins provide extra functionality for interaction with textareas.
+ */
+( function( $ ) {
+$.fn.textSelection = function( command, options ) {
+var fn = {
+/**
+ * Get the contents of the textarea
+ */
+getContents: function() {
+ return this.val();
+},
+/**
+ * Get the currently selected text in this textarea. Will focus the textarea
+ * in some browsers (IE/Opera)
+ */
+getSelection: function() {
+ var e = this.get( 0 );
+ var retval = '';
+ if ( $(e).is( ':hidden' ) ) {
+ // Do nothing
+ } else if ( document.selection && document.selection.createRange ) {
+ e.focus();
+ var range = document.selection.createRange();
+ retval = range.text;
+ } else if ( e.selectionStart || e.selectionStart == '0' ) {
+ retval = e.value.substring( e.selectionStart, e.selectionEnd );
+ }
+ return retval;
+},
+/**
+ * Ported from skins/common/edit.js by Trevor Parscal
+ * (c) 2009 Wikimedia Foundation (GPLv2) - http://www.wikimedia.org
+ *
+ * Inserts text at the begining and end of a text selection, optionally
+ * inserting text at the caret when selection is empty.
+ */
+encapsulateSelection: function( options ) {
+ return this.each( function() {
+ /**
+ * Check if the selected text is the same as the insert text
+ */
+ function checkSelectedText() {
+ if ( !selText ) {
+ selText = options.peri;
+ isSample = true;
+ } else if ( options.replace ) {
+ selText = options.peri;
+ } else if ( selText.charAt( selText.length - 1 ) == ' ' ) {
+ // Exclude ending space char
+ selText = selText.substring(0, selText.length - 1);
+ options.post += ' ';
+ }
+ }
+ var isSample = false;
+ if ( this.style.display == 'none' ) {
+ // Do nothing
+ } else if ( this.selectionStart || this.selectionStart == '0' ) {
+ // Mozilla/Opera
+ $(this).focus();
+ var selText = $(this).textSelection( 'getSelection' );
+ var startPos = this.selectionStart;
+ var endPos = this.selectionEnd;
+ var scrollTop = this.scrollTop;
+ checkSelectedText();
+ if ( options.ownline ) {
+ if ( startPos != 0 && this.value.charAt( startPos - 1 ) != "\n" ) {
+ options.pre = "\n" + options.pre;
+ }
+ if ( this.value.charAt( endPos ) != "\n" ) {
+ options.post += "\n";
+ }
+ }
+ this.value = this.value.substring( 0, startPos ) + options.pre + selText + options.post +
+ this.value.substring( endPos, this.value.length );
+ // Setting this.value scrolls the textarea to the top, restore the scroll position
+ this.scrollTop = scrollTop;
+ if ( window.opera ) {
+ options.pre = options.pre.replace( /\r?\n/g, "\r\n" );
+ selText = selText.replace( /\r?\n/g, "\r\n" );
+ options.post = options.post.replace( /\r?\n/g, "\r\n" );
+ }
+ if ( isSample && options.selectPeri ) {
+ this.selectionStart = startPos + options.pre.length;
+ this.selectionEnd = startPos + options.pre.length + selText.length;
+ } else {
+ this.selectionStart = startPos + options.pre.length + selText.length +
+ options.post.length;
+ this.selectionEnd = this.selectionStart;
+ }
+ } else if ( document.selection && document.selection.createRange ) {
+ // IE
+ $(this).focus();
+ if ( context ) {
+ context.fn.restoreCursorAndScrollTop();
+ }
+ var selText = $(this).textSelection( 'getSelection' );
+ var scrollTop = this.scrollTop;
+ var range = document.selection.createRange();
+ if ( options.ownline && range.moveStart ) {
+ var range2 = document.selection.createRange();
+ range2.collapse();
+ range2.moveStart( 'character', -1 );
+ // FIXME: Which check is correct?
+ if ( range2.text != "\r" && range2.text != "\n" && range2.text != "" ) {
+ options.pre = "\n" + options.pre;
+ }
+ var range3 = document.selection.createRange();
+ range3.collapse( false );
+ range3.moveEnd( 'character', 1 );
+ if ( range3.text != "\r" && range3.text != "\n" && range3.text != "" ) {
+ options.post += "\n";
+ }
+ }
+ checkSelectedText();
+ range.text = options.pre + selText + options.post;
+ if ( isSample && options.selectPeri && range.moveStart ) {
+ range.moveStart( 'character', - options.post.length - selText.length );
+ range.moveEnd( 'character', - options.post.length );
+ }
+ range.select();
+ // Restore the scroll position
+ this.scrollTop = scrollTop;
+ }
+ $(this).trigger( 'encapsulateSelection', [ options.pre, options.peri, options.post, options.ownline,
+ options.replace ] );
+ });
+},
+/**
+ * Ported from Wikia's LinkSuggest extension
+ * https://svn.wikia-code.com/wikia/trunk/extensions/wikia/LinkSuggest
+ * Some code copied from
+ * http://www.dedestruct.com/2008/03/22/howto-cross-browser-cursor-position-in-textareas/
+ *
+ * Get the position (in resolution of bytes not nessecarily characters)
+ * in a textarea
+ */
+ getCaretPosition: function( options ) {
+ function getCaret( e ) {
+ var caretPos = 0, endPos = 0;
+ if ( $.browser.msie ) {
+ // IE Support
+ var preFinished = false;
+ var periFinished = false;
+ var postFinished = false;
+ var preText, rawPreText, periText;
+ var rawPeriText, postText, rawPostText;
+ // Create range containing text in the selection
+ var periRange = document.selection.createRange().duplicate();
+ // Create range containing text before the selection
+ var preRange = document.body.createTextRange();
+ // Select all the text
+ preRange.moveToElementText(e);
+ // Move the end where we need it
+ preRange.setEndPoint("EndToStart", periRange);
+ // Create range containing text after the selection
+ var postRange = document.body.createTextRange();
+ // Select all the text
+ postRange.moveToElementText(e);
+ // Move the start where we need it
+ postRange.setEndPoint("StartToEnd", periRange);
+ // Load the text values we need to compare
+ preText = rawPreText = preRange.text;
+ periText = rawPeriText = periRange.text;
+ postText = rawPostText = postRange.text;
+ /*
+ * Check each range for trimmed newlines by shrinking the range by 1
+ * character and seeing if the text property has changed. If it has
+ * not changed then we know that IE has trimmed a \r\n from the end.
+ */
+ do {
+ if ( !preFinished ) {
+ if ( preRange.compareEndPoints( "StartToEnd", preRange ) == 0 ) {
+ preFinished = true;
+ } else {
+ preRange.moveEnd( "character", -1 );
+ if ( preRange.text == preText ) {
+ rawPreText += "\r\n";
+ } else {
+ preFinished = true;
+ }
+ }
+ }
+ if ( !periFinished ) {
+ if ( periRange.compareEndPoints( "StartToEnd", periRange ) == 0 ) {
+ periFinished = true;
+ } else {
+ periRange.moveEnd( "character", -1 );
+ if ( periRange.text == periText ) {
+ rawPeriText += "\r\n";
+ } else {
+ periFinished = true;
+ }
+ }
+ }
+ if ( !postFinished ) {
+ if ( postRange.compareEndPoints("StartToEnd", postRange) == 0 ) {
+ postFinished = true;
+ } else {
+ postRange.moveEnd( "character", -1 );
+ if ( postRange.text == postText ) {
+ rawPostText += "\r\n";
+ } else {
+ postFinished = true;
+ }
+ }
+ }
+ } while ( ( !preFinished || !periFinished || !postFinished ) );
+ caretPos = rawPreText.replace( /\r\n/g, "\n" ).length;
+ endPos = caretPos + rawPeriText.replace( /\r\n/g, "\n" ).length;
+ } else if ( e.selectionStart || e.selectionStart == '0' ) {
+ // Firefox support
+ caretPos = e.selectionStart;
+ endPos = e.selectionEnd;
+ }
+ return options.startAndEnd ? [ caretPos, endPos ] : caretPos;
+ }
+ return getCaret( this.get( 0 ) );
+},
+setSelection: function( options ) {
+ return this.each( function() {
+ if ( $(this).is( ':hidden' ) ) {
+ // Do nothing
+ } else if ( this.selectionStart || this.selectionStart == '0' ) {
+ // Opera 9.0 doesn't allow setting selectionStart past
+ // selectionEnd; any attempts to do that will be ignored
+ // Make sure to set them in the right order
+ if ( options.start > this.selectionEnd ) {
+ this.selectionEnd = options.end;
+ this.selectionStart = options.start;
+ } else {
+ this.selectionStart = options.start;
+ this.selectionEnd = options.end;
+ }
+ } else if ( document.body.createTextRange ) {
+ var selection = document.body.createTextRange();
+ selection.moveToElementText( this );
+ var length = this.value.length;
+ // IE doesn't count \n when computing the offset, so we won't either
+ var newLines = this.value.match( /\n/g );
+ if ( newLines) length = length - newLines.length;
+ selection.moveStart( 'character', options.start );
+ selection.moveEnd( 'character', -length + options.end );
+
+ // This line can cause an error under certain circumstances (textarea empty, no selection)
+ // Silence that error
+ try {
+ selection.select();
+ } catch( e ) { }
+ }
+ });
+},
+/**
+ * Ported from Wikia's LinkSuggest extension
+ * https://svn.wikia-code.com/wikia/trunk/extensions/wikia/LinkSuggest
+ *
+ * Scroll a textarea to the current cursor position. You can set the cursor
+ * position with setSelection()
+ * @param options boolean Whether to force a scroll even if the caret position
+ * is already visible. Defaults to false
+ */
+scrollToCaretPosition: function( options ) {
+ function getLineLength( e ) {
+ return Math.floor( e.scrollWidth / ( $.client.profile().platform == 'linux' ? 7 : 8 ) );
+ }
+ function getCaretScrollPosition( e ) {
+ // FIXME: This functions sucks and is off by a few lines most
+ // of the time. It should be replaced by something decent.
+ var text = e.value.replace( /\r/g, "" );
+ var caret = $( e ).textSelection( 'getCaretPosition' );
+ var lineLength = getLineLength( e );
+ var row = 0;
+ var charInLine = 0;
+ var lastSpaceInLine = 0;
+ for ( i = 0; i < caret; i++ ) {
+ charInLine++;
+ if ( text.charAt( i ) == " " ) {
+ lastSpaceInLine = charInLine;
+ } else if ( text.charAt( i ) == "\n" ) {
+ lastSpaceInLine = 0;
+ charInLine = 0;
+ row++;
+ }
+ if ( charInLine > lineLength ) {
+ if ( lastSpaceInLine > 0 ) {
+ charInLine = charInLine - lastSpaceInLine;
+ lastSpaceInLine = 0;
+ row++;
+ }
+ }
+ }
+ var nextSpace = 0;
+ for ( j = caret; j < caret + lineLength; j++ ) {
+ if (
+ text.charAt( j ) == " " ||
+ text.charAt( j ) == "\n" ||
+ caret == text.length
+ ) {
+ nextSpace = j;
+ break;
+ }
+ }
+ if ( nextSpace > lineLength && caret <= lineLength ) {
+ charInLine = caret - lastSpaceInLine;
+ row++;
+ }
+ return ( $.client.profile().platform == 'mac' ? 13 : ( $.client.profile().platform == 'linux' ? 15 : 16 ) ) * row;
+ }
+ return this.each(function() {
+ if ( $(this).is( ':hidden' ) ) {
+ // Do nothing
+ } else if ( this.selectionStart || this.selectionStart == '0' ) {
+ // Mozilla
+ var scroll = getCaretScrollPosition( this );
+ if ( options.force || scroll < $(this).scrollTop() ||
+ scroll > $(this).scrollTop() + $(this).height() )
+ $(this).scrollTop( scroll );
+ } else if ( document.selection && document.selection.createRange ) {
+ // IE / Opera
+ /*
+ * IE automatically scrolls the selected text to the
+ * bottom of the textarea at range.select() time, except
+ * if it was already in view and the cursor position
+ * wasn't changed, in which case it does nothing. To
+ * cover that case, we'll force it to act by moving one
+ * character back and forth.
+ */
+ var range = document.body.createTextRange();
+ var savedRange = document.selection.createRange();
+ var pos = $(this).textSelection( 'getCaretPosition' );
+ var oldScrollTop = this.scrollTop;
+ range.moveToElementText( this );
+ range.collapse();
+ range.move( 'character', pos + 1);
+ range.select();
+ if ( this.scrollTop != oldScrollTop )
+ this.scrollTop += range.offsetTop;
+ else if ( options.force ) {
+ range.move( 'character', -1 );
+ range.select();
+ }
+ savedRange.select();
+ }
+ $(this).trigger( 'scrollToPosition' );
+ } );
+}
+};
+ // Apply defaults
+ switch ( command ) {
+ //case 'getContents': // no params
+ //case 'setContents': // no params with defaults
+ //case 'getSelection': // no params
+ case 'encapsulateSelection':
+ options = $.extend( {
+ 'pre': '', // Text to insert before the cursor/selection
+ 'peri': '', // Text to insert between pre and post and select afterwards
+ 'post': '', // Text to insert after the cursor/selection
+ 'ownline': false, // Put the inserted text on a line of its own
+ 'replace': false, // If there is a selection, replace it with peri instead of leaving it alone
+ 'selectPeri': true // Select the peri text if it was inserted (but not if there was a selection and replace==false)
+ }, options );
+ break;
+ case 'getCaretPosition':
+ options = $.extend( {
+ 'startAndEnd': false // Return [start, end] instead of just start
+ }, options );
+ // FIXME: We may not need character position-based functions if we insert markers in the right places
+ break;
+ case 'setSelection':
+ options = $.extend( {
+ 'start': undefined, // Position to start selection at
+ 'end': undefined, // Position to end selection at. Defaults to start
+ 'startContainer': undefined, // Element to start selection in (iframe only)
+ 'endContainer': undefined // Element to end selection in (iframe only). Defaults to startContainer
+ }, options );
+ if ( options.end === undefined )
+ options.end = options.start;
+ if ( options.endContainer == undefined )
+ options.endContainer = options.startContainer;
+ // FIXME: We may not need character position-based functions if we insert markers in the right places
+ break;
+ case 'scrollToCaretPosition':
+ options = $.extend( {
+ 'force': false // Force a scroll even if the caret position is already visible
+ }, options );
+ break;
+ }
+ var context = $(this).data( 'wikiEditor-context' );
+ var hasIframe = typeof context !== 'undefined' && context && typeof context.$iframe !== 'undefined';
+
+ // IE selection restore voodoo
+ var needSave = false;
+ if ( hasIframe && context.savedSelection !== null ) {
+ context.fn.restoreSelection();
+ needSave = true;
+ }
+ retval = ( hasIframe ? context.fn : fn )[command].call( this, options );
+ if ( hasIframe && needSave ) {
+ context.fn.saveSelection();
+ }
+ return retval;
+};
+
+} )( jQuery );
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff