mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/CodeEditor
synced 2024-11-28 09:00:24 +00:00
430 lines
13 KiB
JavaScript
430 lines
13 KiB
JavaScript
/* Ace syntax-highlighting code editor extension for wikiEditor */
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( function( $ ) {
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$.wikiEditor.modules.codeEditor = {
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/**
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* Core Requirements
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*/
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'req': [ 'codeEditor' ],
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/**
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* Configuration
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*/
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cfg: {
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//
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},
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/**
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* API accessible functions
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*/
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api: {
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//
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},
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/**
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* Event handlers
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*/
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evt: {
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//
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},
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/**
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* Internally used functions
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*/
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fn: {
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}
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};
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$.wikiEditor.extensions.codeEditor = function( context ) {
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/*
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* Event Handlers
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*
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* These act as filters returning false if the event should be ignored or returning true if it should be passed
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* on to all modules. This is also where we can attach some extra information to the events.
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*/
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context.evt = $.extend( context.evt, {
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/**
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* Filters change events, which occur when the user interacts with the contents of the iframe. The goal of this
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* function is to both classify the scope of changes as 'division' or 'character' and to prevent further
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* processing of events which did not actually change the content of the iframe.
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*/
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'keydown': function( event ) {
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},
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'change': function( event ) {
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},
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'delayedChange': function( event ) {
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},
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'cut': function( event ) {
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},
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'paste': function( event ) {
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},
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'ready': function( event ) {
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},
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'codeEditorSubmit': function( event ) {
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context.$textarea.val( context.$textarea.textSelection( 'getContents' ) );
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}
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} );
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var cookieEnabled = $.cookie('wikiEditor-' + context.instance + '-codeEditor-enabled');
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context.codeEditorActive = (cookieEnabled !== '0');
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/**
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* Internally used functions
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*/
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context.fn = $.extend( context.fn, {
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'codeEditorToolbarIcon': function() {
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// When loaded as a gadget, one may need to override the wiki's own assets path.
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var iconPath = mw.config.get('wgCodeEditorAssetsPath', mw.config.get('wgExtensionAssetsPath')) + '/CodeEditor/images/';
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return iconPath + (context.codeEditorActive ? 'code-selected.png' : 'code.png');
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},
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'setupCodeEditorToolbar': function() {
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// Drop out some formatting that isn't relevant on these pages...
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context.api.removeFromToolbar(context, {
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'section': 'main',
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'group': 'format',
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'tool': 'bold'
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});
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context.api.removeFromToolbar(context, {
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'section': 'main',
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'group': 'format',
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'tool': 'italic'
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});
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var callback = function( context ) {
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context.codeEditorActive = !context.codeEditorActive;
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$.cookie(
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'wikiEditor-' + context.instance + '-codeEditor-enabled',
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context.codeEditorActive ? 1 : 0,
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{ expires: 30, path: '/' }
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);
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context.fn.toggleCodeEditorToolbar();
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if (context.codeEditorActive) {
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// set it back up!
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context.fn.setupCodeEditor();
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} else {
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context.fn.disableCodeEditor();
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}
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};
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context.api.addToToolbar( context, {
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'section': 'main',
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'group': 'format',
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'tools': {
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'codeEditor': {
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'labelMsg': 'codeeditor-toolbar-toggle',
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'type': 'button',
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'icon': context.fn.codeEditorToolbarIcon(),
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'action': {
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'type': 'callback',
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'execute': callback
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}
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}
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}
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} );
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},
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'toggleCodeEditorToolbar': function() {
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var target = 'img.tool[rel=codeEditor]';
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var $img = context.modules.toolbar.$toolbar.find( target );
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$img.attr('src', context.fn.codeEditorToolbarIcon());
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},
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/**
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* Sets up the iframe in place of the textarea to allow more advanced operations
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*/
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'setupCodeEditor': function() {
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var box = context.$textarea;
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var lang = mw.config.get("wgCodeEditorCurrentLanguage");
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if (lang) {
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// Ace doesn't like replacing a textarea directly.
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// We'll stub this out to sit on top of it...
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// line-height is needed to compensate for oddity in WikiEditor extension, which zeroes the line-height on a parent container
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var container = context.$codeEditorContainer = $('<div style="position: relative"><div class="editor" style="line-height: 1.5em; top: 0px; left: 0px; right: 0px; bottom: 0px; border: 1px solid gray"></div></div>').insertAfter(box);
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var editdiv = container.find('.editor');
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box.css('display', 'none');
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container.width(box.width())
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.height(box.height());
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editdiv.text(box.val());
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context.codeEditor = ace.edit(editdiv[0]);
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// Disable some annoying commands
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context.codeEditor.commands.removeCommand('replace'); // ctrl+R
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context.codeEditor.commands.removeCommand('transposeletters'); // ctrl+T
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context.codeEditor.commands.removeCommand('gotoline'); // ctrl+L
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// fakeout for bug 29328
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context.$iframe = [
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{
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contentWindow: {
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focus: function() {
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context.codeEditor.focus();
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}
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}
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}
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];
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box.closest('form').submit( context.evt.codeEditorSubmit );
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var session = context.codeEditor.getSession();
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// Use proper tabs
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session.setUseSoftTabs( false );
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// Bug 47235: Update text field for LivePreview
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if ( mw.hook ) {
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// New style hook
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mw.hook( 'LivePreviewPrepare' ).add( context.evt.codeEditorSubmit );
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mw.hook( 'codeEditor.configure' ).fire( session );
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}
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// Old, deprecated style for backwards compat
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// Do this even if mw.hook exists, because the caller wasn't
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// updated right away to actually use the new style.
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$( mw ).bind( 'LivePreviewPrepare', context.evt.codeEditorSubmit );
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// Disable code-linting in the background using JavaScript WebWorkers.
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// Currently broken due to require() / ResourceLoader mismatch.
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session.setUseWorker(false);
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session.setMode(new (require("ace/mode/" + lang).Mode));
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// Force the box to resize horizontally to match in future :D
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var resize = function() {
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container.width(box.width());
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};
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$(window).resize(resize);
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// Use jquery.ui.resizable so user can make the box taller too
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container.resizable({
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handles: 's',
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minHeight: box.height(),
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resize: function() {
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context.codeEditor.resize();
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}
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});
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var summary = $('#wpSummary');
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// Let modules know we're ready to start working with the content
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context.fn.trigger( 'ready' );
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}
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},
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/**
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* Turn off the code editor view and return to the plain textarea.
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* May be needed by some folks with funky browsers, or just to compare.
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*/
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'disableCodeEditor': function() {
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// Kills it!
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context.$textarea.closest('form').unbind('submit', context.evt.codeEditorSubmit );
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if ( mw.hook ) {
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mw.hook( 'LivePreviewPrepare' ).remove( context.evt.codeEditorSubmit );
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}
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$( mw ).unbind( 'LivePreviewPrepare', context.evt.codeEditorSubmit ); // deprecated
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// Save contents
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context.$textarea.val(context.fn.getContents());
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// @todo fetch cursor, scroll position
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// Drop the fancy editor widget...
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context.$codeEditorContainer.remove();
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context.$codeEditorContainer = undefined;
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context.$iframe = undefined;
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context.codeEditor = undefined;
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// Restore textarea
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context.$textarea.show();
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// @todo restore cursor, scroll position
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},
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/**
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* Start monitoring the fragment of the current window for hash change
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* events. If the hash is already set, handle it as a new event.
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*/
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'codeEditorMonitorFragment': function() {
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function onHashChange() {
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var regexp = /#mw-ce-l(\d+)/;
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var result = regexp.exec( window.location.hash );
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if ( result === null ) {
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return;
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}
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// Line numbers in CodeEditor are zero-based
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var line = parseInt( result[1] );
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context.codeEditor.navigateTo( line - 1, 0 );
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// Scroll up a bit to give some context
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context.codeEditor.scrollToRow( line - 4 );
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}
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onHashChange();
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$( window ).bind( 'hashchange', onHashChange );
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}
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});
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/**
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* Override the base functions in a way that lets
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* us fall back to the originals when we turn off.
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*/
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var saveAndExtend = function( base, extended ) {
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var saved = {};
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// $.map doesn't handle objects in jQuery < 1.6; need this for compat with MW 1.17
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var map = function( obj, callback ) {
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for (var key in extended ) {
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if ( obj.hasOwnProperty( key ) ) {
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callback( obj[key], key );
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}
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}
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};
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map( extended, function( func, name ) {
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if ( name in base ) {
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var orig = base[name];
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base[name] = function() {
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if (context.codeEditorActive) {
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return func.apply(this, arguments);
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} else if (orig) {
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return orig.apply(this, arguments);
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} else {
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throw new Error('CodeEditor: no original function to call for ' + name);
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}
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};
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} else {
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base[name] = func;
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}
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});
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};
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saveAndExtend( context.fn, {
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'saveCursorAndScrollTop': function() {
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// Stub out textarea behavior
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return;
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},
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'restoreCursorAndScrollTop': function() {
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// Stub out textarea behavior
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return;
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},
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'saveSelection': function() {
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mw.log('codeEditor stub function saveSelection called');
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},
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'restoreSelection': function() {
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mw.log('codeEditor stub function restoreSelection called');
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},
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/* Needed for search/replace */
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'getContents': function() {
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return context.codeEditor.getSession().getValue();
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},
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/**
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* Compatibility with the $.textSelection jQuery plug-in. When the iframe is in use, these functions provide
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* equivilant functionality to the otherwise textarea-based functionality.
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*/
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'getElementAtCursor': function() {
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mw.log('codeEditor stub function getElementAtCursor called');
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},
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/**
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* Gets the currently selected text in the content
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* DO NOT CALL THIS DIRECTLY, use $.textSelection( 'functionname', options ) instead
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*/
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'getSelection': function() {
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return context.codeEditor.getCopyText();
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},
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/**
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* Inserts text at the begining and end of a text selection, optionally inserting text at the caret when
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* selection is empty.
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* DO NOT CALL THIS DIRECTLY, use $.textSelection( 'functionname', options ) instead
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*/
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'encapsulateSelection': function( options ) {
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// Does not yet handle 'ownline', 'splitlines' option
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var sel = context.codeEditor.getSelection();
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var range = sel.getRange();
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var selText = context.fn.getSelection();
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var isSample = false;
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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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}
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var text = options.pre;
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text += selText;
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text += options.post;
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context.codeEditor.insert( text );
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if ( isSample && options.selectPeri && !options.splitlines ) {
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// May esplode if anything has newlines, be warned. :)
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range.setStart( range.start.row, range.start.column + options.pre.length );
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range.setEnd( range.start.row, range.start.column + selText.length );
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sel.setSelectionRange(range);
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}
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return context.$textarea;
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},
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/**
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* Gets the position (in resolution of bytes not nessecarily characters) in a textarea
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* DO NOT CALL THIS DIRECTLY, use $.textSelection( 'functionname', options ) instead
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*/
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'getCaretPosition': function( options ) {
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mw.log('codeEditor stub function getCaretPosition called');
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},
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/**
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* Sets the selection of the content
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* DO NOT CALL THIS DIRECTLY, use $.textSelection( 'functionname', options ) instead
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*
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* @param start Character offset of selection start
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* @param end Character offset of selection end
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* @param startContainer Element in iframe to start selection in. If not set, start is a character offset
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* @param endContainer Element in iframe to end selection in. If not set, end is a character offset
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*/
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'setSelection': function( options ) {
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// Ace stores positions for ranges as row/column pairs.
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// To convert from character offsets, we'll need to iterate through the document
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var doc = context.codeEditor.getSession().getDocument();
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var lines = doc.getAllLines();
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var offsetToPos = function( offset ) {
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var row = 0, col = 0;
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var pos = 0;
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while ( row < lines.length && pos + lines[row].length < offset) {
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pos += lines[row].length;
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pos++; // for the newline
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row++;
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}
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col = offset - pos;
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return {row: row, column: col};
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};
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var start = offsetToPos( options.start ),
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end = offsetToPos( options.end );
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var sel = context.codeEditor.getSelection();
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var range = sel.getRange();
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range.setStart( start.row, start.column );
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range.setEnd( end.row, end.column );
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sel.setSelectionRange( range );
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return context.$textarea;
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},
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/**
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* Scroll a textarea to the current cursor position. You can set the cursor position with setSelection()
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* DO NOT CALL THIS DIRECTLY, use $.textSelection( 'functionname', options ) instead
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*/
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'scrollToCaretPosition': function( options ) {
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mw.log('codeEditor stub function scrollToCaretPosition called');
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return context.$textarea;
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},
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/**
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* Scroll an element to the top of the iframe
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* DO NOT CALL THIS DIRECTLY, use $.textSelection( 'functionname', options ) instead
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*
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* @param $element jQuery object containing an element in the iframe
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* @param force If true, scroll the element even if it's already visible
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*/
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'scrollToTop': function( $element, force ) {
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mw.log('codeEditor stub function scrollToTop called');
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}
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} );
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/* Setup the editor */
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context.fn.setupCodeEditorToolbar();
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if (context.codeEditorActive) {
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context.fn.setupCodeEditor();
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}
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};
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} )( jQuery );
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