mirror of
https://github.com/YunoHost-Apps/mediawiki_ynh.git
synced 2024-09-03 19:46:05 +02:00
573 lines
19 KiB
JavaScript
573 lines
19 KiB
JavaScript
/**
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* These plugins provide extra functionality for interaction with textareas.
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*/
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( function ( $ ) {
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/*jshint noempty:false */
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if ( document.selection && document.selection.createRange ) {
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// On IE, patch the focus() method to restore the windows' scroll position
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// (bug 32241)
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$.fn.extend({
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focus: ( function ( jqFocus ) {
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return function () {
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var $w, state, result;
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if ( arguments.length === 0 ) {
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$w = $( window );
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state = {top: $w.scrollTop(), left: $w.scrollLeft()};
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result = jqFocus.apply( this, arguments );
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window.scrollTo( state.top, state.left );
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return result;
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}
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return jqFocus.apply( this, arguments );
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};
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}( $.fn.focus ) )
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});
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}
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$.fn.textSelection = function ( command, options ) {
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var fn,
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context,
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hasIframe,
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needSave,
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retval;
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/**
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* Helper function to get an IE TextRange object for an element
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*/
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function rangeForElementIE( e ) {
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if ( e.nodeName.toLowerCase() === 'input' ) {
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return e.createTextRange();
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} else {
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var sel = document.body.createTextRange();
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sel.moveToElementText( e );
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return sel;
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}
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}
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/**
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* Helper function for IE for activating the textarea. Called only in the
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* IE-specific code paths below; makes use of IE-specific non-standard
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* function setActive() if possible to avoid screen flicker.
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*/
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function activateElementOnIE( element ) {
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if ( element.setActive ) {
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element.setActive(); // bug 32241: doesn't scroll
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} else {
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$( element ).focus(); // may scroll (but we patched it above)
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}
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}
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fn = {
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/**
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* Get the contents of the textarea
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*/
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getContents: function () {
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return this.val();
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},
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/**
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* Get the currently selected text in this textarea. Will focus the textarea
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* in some browsers (IE/Opera)
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*/
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getSelection: function () {
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var retval, range,
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el = this.get( 0 );
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if ( $(el).is( ':hidden' ) ) {
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// Do nothing
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retval = '';
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} else if ( document.selection && document.selection.createRange ) {
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activateElementOnIE( el );
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range = document.selection.createRange();
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retval = range.text;
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} else if ( el.selectionStart || el.selectionStart === 0 ) {
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retval = el.value.substring( el.selectionStart, el.selectionEnd );
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}
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return retval;
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},
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/**
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* Ported from skins/common/edit.js by Trevor Parscal
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* (c) 2009 Wikimedia Foundation (GPLv2) - http://www.wikimedia.org
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*
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* Inserts text at the beginning and end of a text selection, optionally
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* inserting text at the caret when selection is empty.
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*
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* @fixme document the options parameters
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*/
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encapsulateSelection: function ( options ) {
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return this.each( function () {
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var selText, scrollTop, insertText,
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isSample, range, range2, range3, startPos, endPos,
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pre = options.pre,
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post = options.post;
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/**
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* Check if the selected text is the same as the insert text
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*/
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function checkSelectedText() {
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if ( !selText ) {
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selText = options.peri;
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isSample = true;
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} else if ( options.replace ) {
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selText = options.peri;
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} else {
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while ( selText.charAt( selText.length - 1 ) === ' ' ) {
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// Exclude ending space char
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selText = selText.substring( 0, selText.length - 1 );
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post += ' ';
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}
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while ( selText.charAt( 0 ) === ' ' ) {
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// Exclude prepending space char
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selText = selText.substring( 1, selText.length );
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pre = ' ' + pre;
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}
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}
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}
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/**
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* Do the splitlines stuff.
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*
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* Wrap each line of the selected text with pre and post
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*/
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function doSplitLines( selText, pre, post ) {
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var i,
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insertText = '',
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selTextArr = selText.split( '\n' );
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for ( i = 0; i < selTextArr.length; i++ ) {
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insertText += pre + selTextArr[i] + post;
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if ( i !== selTextArr.length - 1 ) {
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insertText += '\n';
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}
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}
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return insertText;
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}
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isSample = false;
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if ( this.style.display === 'none' ) {
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// Do nothing
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} else if ( document.selection && document.selection.createRange ) {
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// IE
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// Note that IE9 will trigger the next section unless we check this first.
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// See bug 35201.
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activateElementOnIE( this );
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if ( context ) {
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context.fn.restoreCursorAndScrollTop();
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}
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if ( options.selectionStart !== undefined ) {
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$(this).textSelection( 'setSelection', { 'start': options.selectionStart, 'end': options.selectionEnd } );
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}
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selText = $(this).textSelection( 'getSelection' );
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scrollTop = this.scrollTop;
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range = document.selection.createRange();
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checkSelectedText();
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insertText = pre + selText + post;
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if ( options.splitlines ) {
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insertText = doSplitLines( selText, pre, post );
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}
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if ( options.ownline && range.moveStart ) {
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range2 = document.selection.createRange();
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range2.collapse();
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range2.moveStart( 'character', -1 );
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// FIXME: Which check is correct?
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if ( range2.text !== '\r' && range2.text !== '\n' && range2.text !== '' ) {
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insertText = '\n' + insertText;
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pre += '\n';
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}
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range3 = document.selection.createRange();
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range3.collapse( false );
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range3.moveEnd( 'character', 1 );
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if ( range3.text !== '\r' && range3.text !== '\n' && range3.text !== '' ) {
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insertText += '\n';
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post += '\n';
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}
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}
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range.text = insertText;
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if ( isSample && options.selectPeri && range.moveStart ) {
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range.moveStart( 'character', - post.length - selText.length );
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range.moveEnd( 'character', - post.length );
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}
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range.select();
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// Restore the scroll position
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this.scrollTop = scrollTop;
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} else if ( this.selectionStart || this.selectionStart === 0 ) {
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// Mozilla/Opera
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$(this).focus();
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if ( options.selectionStart !== undefined ) {
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$(this).textSelection( 'setSelection', { 'start': options.selectionStart, 'end': options.selectionEnd } );
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}
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selText = $(this).textSelection( 'getSelection' );
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startPos = this.selectionStart;
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endPos = this.selectionEnd;
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scrollTop = this.scrollTop;
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checkSelectedText();
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if ( options.selectionStart !== undefined
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&& endPos - startPos !== options.selectionEnd - options.selectionStart )
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{
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// This means there is a difference in the selection range returned by browser and what we passed.
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// This happens for Chrome in the case of composite characters. Ref bug #30130
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// Set the startPos to the correct position.
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startPos = options.selectionStart;
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}
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insertText = pre + selText + post;
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if ( options.splitlines ) {
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insertText = doSplitLines( selText, pre, post );
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}
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if ( options.ownline ) {
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if ( startPos !== 0 && this.value.charAt( startPos - 1 ) !== '\n' && this.value.charAt( startPos - 1 ) !== '\r' ) {
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insertText = '\n' + insertText;
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pre += '\n';
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}
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if ( this.value.charAt( endPos ) !== '\n' && this.value.charAt( endPos ) !== '\r' ) {
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insertText += '\n';
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post += '\n';
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}
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}
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this.value = this.value.substring( 0, startPos ) + insertText +
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this.value.substring( endPos, this.value.length );
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// Setting this.value scrolls the textarea to the top, restore the scroll position
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this.scrollTop = scrollTop;
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if ( window.opera ) {
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pre = pre.replace( /\r?\n/g, '\r\n' );
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selText = selText.replace( /\r?\n/g, '\r\n' );
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post = post.replace( /\r?\n/g, '\r\n' );
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}
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if ( isSample && options.selectPeri && !options.splitlines ) {
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this.selectionStart = startPos + pre.length;
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this.selectionEnd = startPos + pre.length + selText.length;
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} else {
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this.selectionStart = startPos + insertText.length;
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this.selectionEnd = this.selectionStart;
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}
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}
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$(this).trigger( 'encapsulateSelection', [ options.pre, options.peri, options.post, options.ownline,
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options.replace, options.spitlines ] );
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});
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},
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/**
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* Ported from Wikia's LinkSuggest extension
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* https://svn.wikia-code.com/wikia/trunk/extensions/wikia/LinkSuggest
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* Some code copied from
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* http://www.dedestruct.com/2008/03/22/howto-cross-browser-cursor-position-in-textareas/
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*
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* Get the position (in resolution of bytes not necessarily characters)
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* in a textarea
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*
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* Will focus the textarea in some browsers (IE/Opera)
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*
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* @fixme document the options parameters
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*/
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getCaretPosition: function ( options ) {
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function getCaret( e ) {
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var caretPos = 0,
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endPos = 0,
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preText, rawPreText, periText,
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rawPeriText, postText, rawPostText,
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// IE Support
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preFinished,
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periFinished,
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postFinished,
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// Range containing text in the selection
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periRange,
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// Range containing text before the selection
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preRange,
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// Range containing text after the selection
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postRange;
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if ( document.selection && document.selection.createRange ) {
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// IE doesn't properly report non-selected caret position through
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// the selection ranges when textarea isn't focused. This can
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// lead to saving a bogus empty selection, which then screws up
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// whatever we do later (bug 31847).
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activateElementOnIE( e );
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preFinished = false;
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periFinished = false;
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postFinished = false;
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periRange = document.selection.createRange().duplicate();
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preRange = rangeForElementIE( e );
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// Move the end where we need it
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preRange.setEndPoint( 'EndToStart', periRange );
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postRange = rangeForElementIE( e );
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// Move the start where we need it
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postRange.setEndPoint( 'StartToEnd', periRange );
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// Load the text values we need to compare
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preText = rawPreText = preRange.text;
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periText = rawPeriText = periRange.text;
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postText = rawPostText = postRange.text;
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/*
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* Check each range for trimmed newlines by shrinking the range by 1
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* character and seeing if the text property has changed. If it has
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* not changed then we know that IE has trimmed a \r\n from the end.
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*/
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do {
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if ( !preFinished ) {
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if ( preRange.compareEndPoints( 'StartToEnd', preRange ) === 0 ) {
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preFinished = true;
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} else {
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preRange.moveEnd( 'character', -1 );
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if ( preRange.text === preText ) {
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rawPreText += '\r\n';
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} else {
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preFinished = true;
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}
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}
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}
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if ( !periFinished ) {
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if ( periRange.compareEndPoints( 'StartToEnd', periRange ) === 0 ) {
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periFinished = true;
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} else {
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periRange.moveEnd( 'character', -1 );
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if ( periRange.text === periText ) {
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rawPeriText += '\r\n';
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} else {
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periFinished = true;
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}
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}
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}
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if ( !postFinished ) {
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if ( postRange.compareEndPoints( 'StartToEnd', postRange ) === 0 ) {
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postFinished = true;
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} else {
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postRange.moveEnd( 'character', -1 );
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if ( postRange.text === postText ) {
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rawPostText += '\r\n';
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} else {
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postFinished = true;
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}
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}
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}
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} while ( ( !preFinished || !periFinished || !postFinished ) );
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caretPos = rawPreText.replace( /\r\n/g, '\n' ).length;
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endPos = caretPos + rawPeriText.replace( /\r\n/g, '\n' ).length;
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} else if ( e.selectionStart || e.selectionStart === 0 ) {
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// Firefox support
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caretPos = e.selectionStart;
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endPos = e.selectionEnd;
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}
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return options.startAndEnd ? [ caretPos, endPos ] : caretPos;
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}
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return getCaret( this.get( 0 ) );
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},
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/**
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* @fixme document the options parameters
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*/
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setSelection: function ( options ) {
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return this.each( function () {
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var selection, length, newLines;
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if ( $(this).is( ':hidden' ) ) {
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// Do nothing
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} else if ( this.selectionStart || this.selectionStart === 0 ) {
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// Opera 9.0 doesn't allow setting selectionStart past
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// selectionEnd; any attempts to do that will be ignored
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// Make sure to set them in the right order
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if ( options.start > this.selectionEnd ) {
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this.selectionEnd = options.end;
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this.selectionStart = options.start;
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} else {
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this.selectionStart = options.start;
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this.selectionEnd = options.end;
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}
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} else if ( document.body.createTextRange ) {
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selection = rangeForElementIE( this );
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length = this.value.length;
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// IE doesn't count \n when computing the offset, so we won't either
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newLines = this.value.match( /\n/g );
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if ( newLines ) {
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length = length - newLines.length;
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}
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selection.moveStart( 'character', options.start );
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selection.moveEnd( 'character', -length + options.end );
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// This line can cause an error under certain circumstances (textarea empty, no selection)
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// Silence that error
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try {
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selection.select();
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} catch ( e ) { }
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}
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});
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},
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/**
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* Ported from Wikia's LinkSuggest extension
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* https://svn.wikia-code.com/wikia/trunk/extensions/wikia/LinkSuggest
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*
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* Scroll a textarea to the current cursor position. You can set the cursor
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* position with setSelection()
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* @param options boolean Whether to force a scroll even if the caret position
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* is already visible. Defaults to false
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*
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* @fixme document the options parameters (function body suggests options.force is a boolean, not options itself)
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*/
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scrollToCaretPosition: function ( options ) {
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function getLineLength( e ) {
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return Math.floor( e.scrollWidth / ( $.client.profile().platform === 'linux' ? 7 : 8 ) );
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}
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function getCaretScrollPosition( e ) {
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// FIXME: This functions sucks and is off by a few lines most
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// of the time. It should be replaced by something decent.
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var i, j,
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nextSpace,
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text = e.value.replace( /\r/g, '' ),
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caret = $( e ).textSelection( 'getCaretPosition' ),
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lineLength = getLineLength( e ),
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row = 0,
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charInLine = 0,
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lastSpaceInLine = 0;
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for ( i = 0; i < caret; i++ ) {
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charInLine++;
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if ( text.charAt( i ) === ' ' ) {
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lastSpaceInLine = charInLine;
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} else if ( text.charAt( i ) === '\n' ) {
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lastSpaceInLine = 0;
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charInLine = 0;
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row++;
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}
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if ( charInLine > lineLength ) {
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if ( lastSpaceInLine > 0 ) {
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charInLine = charInLine - lastSpaceInLine;
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lastSpaceInLine = 0;
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row++;
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}
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}
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}
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nextSpace = 0;
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for ( j = caret; j < caret + lineLength; j++ ) {
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if (
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text.charAt( j ) === ' ' ||
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text.charAt( j ) === '\n' ||
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caret === text.length
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) {
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nextSpace = j;
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break;
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}
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}
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if ( nextSpace > lineLength && caret <= lineLength ) {
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charInLine = caret - lastSpaceInLine;
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row++;
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}
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return ( $.client.profile().platform === 'mac' ? 13 : ( $.client.profile().platform === 'linux' ? 15 : 16 ) ) * row;
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}
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return this.each(function () {
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var scroll, range, savedRange, pos, oldScrollTop;
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if ( $(this).is( ':hidden' ) ) {
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// Do nothing
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} else if ( this.selectionStart || this.selectionStart === 0 ) {
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// Mozilla
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scroll = getCaretScrollPosition( this );
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if ( options.force || scroll < $(this).scrollTop() ||
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scroll > $(this).scrollTop() + $(this).height() ) {
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$(this).scrollTop( scroll );
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}
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} else if ( document.selection && document.selection.createRange ) {
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// IE / Opera
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/*
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* IE automatically scrolls the selected text to the
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* bottom of the textarea at range.select() time, except
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* if it was already in view and the cursor position
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* wasn't changed, in which case it does nothing. To
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* cover that case, we'll force it to act by moving one
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* character back and forth.
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*/
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range = document.body.createTextRange();
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savedRange = document.selection.createRange();
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pos = $(this).textSelection( 'getCaretPosition' );
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oldScrollTop = this.scrollTop;
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range.moveToElementText( this );
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range.collapse();
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range.move( 'character', pos + 1);
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range.select();
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if ( this.scrollTop !== oldScrollTop ) {
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this.scrollTop += range.offsetTop;
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} else if ( options.force ) {
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range.move( 'character', -1 );
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range.select();
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}
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savedRange.select();
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}
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$(this).trigger( 'scrollToPosition' );
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} );
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}
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};
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// Apply defaults
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switch ( command ) {
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//case 'getContents': // no params
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//case 'setContents': // no params with defaults
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//case 'getSelection': // no params
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case 'encapsulateSelection':
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options = $.extend( {
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pre: '', // Text to insert before the cursor/selection
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peri: '', // Text to insert between pre and post and select afterwards
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post: '', // Text to insert after the cursor/selection
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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, or if splitlines==true)
|
|
splitlines: false, // If multiple lines are selected, encapsulate each line individually
|
|
selectionStart: undefined, // Position to start selection at
|
|
selectionEnd: undefined // Position to end selection at. Defaults to start
|
|
}, options );
|
|
break;
|
|
case 'getCaretPosition':
|
|
options = $.extend( {
|
|
// Return [start, end] instead of just start
|
|
startAndEnd: false
|
|
}, options );
|
|
// FIXME: We may not need character position-based functions if we insert markers in the right places
|
|
break;
|
|
case 'setSelection':
|
|
options = $.extend( {
|
|
// Position to start selection at
|
|
start: undefined,
|
|
// Position to end selection at. Defaults to start
|
|
end: undefined,
|
|
// Element to start selection in (iframe only)
|
|
startContainer: undefined,
|
|
// Element to end selection in (iframe only). Defaults to startContainer
|
|
endContainer: undefined
|
|
}, 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;
|
|
}
|
|
|
|
context = $(this).data( 'wikiEditor-context' );
|
|
hasIframe = context !== undefined && context && context.$iframe !== undefined;
|
|
|
|
// IE selection restore voodoo
|
|
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 ) );
|