X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/87219ebd28426c6d21cb545233ee52f5f7af7dfd..18a6620945d02687fbcfc4c27355d952fd748b41:/resources/jquery/jquery.textSelection.js

diff --git a/resources/jquery/jquery.textSelection.js b/resources/jquery/jquery.textSelection.js
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+/**
+ * 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 );