MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
 
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// <source lang="javascript">
 
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/*
 
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EditTools support: add a selector, change into true buttons, enable for all text input fields
 
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The special characters to insert are defined at [[MediaWiki:Edittools]].
 
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*/
 
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// Globals: getElementsByClassName, hookEvent, addEvent (from wikibits.js)
 
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if ( load_edittools == true ) { // Legacy. Do we really need this?
 
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if ( typeof( EditTools_set_focus ) == 'undefined' ) {
 
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var EditTools_set_focus = true;
 
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}
 
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if ( typeof( EditTools_set_focus_initially ) == 'undefined' ) {
 
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var EditTools_set_focus_initially = EditTools_set_focus;
 
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}
 
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if ( typeof( EditTools_initial_subset ) == 'undefined' ) {
 
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var EditTools_initial_subset = 0;
 
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}
 
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var EditTools = {
 
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createSelector: function() {
 
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var spec = document.getElementById( 'specialchars' );
 
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if ( !spec ) {
 
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return;
 
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}
 
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var sb = getElementsByClassName( spec, 'p', 'specialbasic' );
 
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if ( sb.length <= 1 ) {
 
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return; // Only care if there is more than one
 
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}
 
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var sel = document.createElement( 'select' );
 
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sel.style.display = 'inline';
 
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// sel.setAttribute( 'onchange', 'EditTools.chooseCharSubset( selectedIndex, true );' );
 
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// Apparently, this doesn't work on IE6. Use an explicit event handling function instead:
 
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sel.onchange = EditTools.handleOnchange;
 
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var initial = EditTools_initial_subset;
 
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if ( isNaN( initial ) || initial < 0 || initial >= sb.length ) {
 
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initial = 0;
 
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}
 
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for ( var i = 0; i < sb.length; i++ ) {
 
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var o = document.createElement( 'option' );
 
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// Ugh. We have encoded Unicode characters in the names...
 
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var id = sb[i].id.replace( /.([0-9A-F][0-9A-F])/g, '%$1' ).replace( /_/g, ' ' );
 
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if ( i == initial ) {
 
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o.selected = 'selected';
 
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}
 
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o.appendChild( document.createTextNode( decodeURIComponent( id ) ) );
 
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sel.appendChild( o );
 
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}
 
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spec.insertBefore( sel, spec.firstChild );
 
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EditTools.chooseCharSubset(
 
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initial,
 
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( wgAction != 'submit' ) &&
 
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EditTools_set_focus_initially &&
 
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( wgCanonicalNamespace != 'Special' || wgCanonicalSpecialPageName != 'Upload' )
 
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);
 
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},
 
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handleOnchange: function( evt ) {
 
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var e    = evt || window.event;      // W3C, IE
 
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var node = e.target || e.srcElement; // W3C, IE
 
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EditTools.chooseCharSubset( node.selectedIndex, true );
 
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return true;
 
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},
 
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chooseCharSubset: function( selected, set_focus ) {
 
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var sb = getElementsByClassName( document.getElementById( 'specialchars' ), 'p', 'specialbasic' );
 
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EditTools.makeButtons( sb[selected] );
 
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for ( var i = 0; i < sb.length; i++ ) {
 
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sb[i].style.display = i == selected ? 'inline' : 'none';
 
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}
 
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if ( set_focus && EditTools_set_focus ) {
 
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var txtarea = EditTools.getTextArea();
 
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if ( txtarea ) {
 
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txtarea.focus();
 
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}
 
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}
 
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},
 
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fixateWidth: function() {
 
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var edit_bar = document.getElementById( 'specialchars' );
 
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if ( !edit_bar ) {
 
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return;
 
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}
 
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// Try to fixate the width of that bar, otherwise IE6 may make it wider, which will lead to
 
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// a table re-layout on the upload form resulting in the right column extending beyond the
 
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// right edge of the window.
 
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edit_bar.setAttribute( 'width', '' + ( edit_bar.clientWidth || edit_bar.offsetWidth ) );
 
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edit_bar.style.maxWidth = '' + ( edit_bar.clientWidth || edit_bar.offsetWidth ) + 'px';
 
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// If we're inside a table, fixate the containing table cell, too.
 
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var parent = edit_bar.parentNode;
 
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while ( parent && parent != document.body && parent.nodeName.toLowerCase() != 'td' ) {
 
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parent = parent.parentNode;
 
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}
 
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if ( parent && parent != document.body ) {
 
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parent.setAttribute( 'width', '' + ( parent.clientWidth || parent.offsetWidth ) );
 
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parent.style.maxWidth = '' + ( parent.clientWidth || parent.offsetWidth ) + 'px';
 
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}
 
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},
 
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makeButtons: function( section ) {
 
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var edit_bar = section || document.getElementById( 'specialchars' );
 
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if ( !edit_bar ) {
 
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return;
 
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}
 
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var links = edit_bar.getElementsByTagName( 'a' );
 
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// 'links' is a *live* collection!
 
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var b = null;
 
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while ( links.length ) {
 
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b = document.createElement( 'input' );
 
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b.type = 'button';
 
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b.style.fontSize = '0.9em';
 
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b.style.paddingLeft = '1px';
 
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b.style.paddingRight = '1px';
 
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b.style.marginLeft = '1px';
 
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b.onclick = links[0].onclick;
 
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b.value = links[0].firstChild.data;
 
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var parent = links[0].parentNode;
 
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parent.replaceChild( b, links[0] ); // This removes links[0] from links!
 
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b.blur(); // IE6 insists on marking some buttons as having the focus...
 
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var margin_added = false;
 
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// Remove text nodes (nodeType == Node.TEXT_NODE, but IE6 doesn't know that...)
 
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// Insert some spacing where desired.
 
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while ( b.nextSibling && b.nextSibling.nodeType == 3 ) {
 
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if ( !margin_added && b.nextSibling.data.search( /\S/ ) >= 0 ) {
 
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b.style.marginRight = '4px';
 
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margin_added = true;
 
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}
 
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parent.removeChild( b.nextSibling );
 
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}
 
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}
 
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},
 
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enableForAllFields: function() {
 
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if ( typeof( insertTags ) != 'function' ) {
 
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return;
 
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}
 
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// insertTags from the site-wide /skins-1.5/common/edit.js just inserts in the first
 
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// textarea in the document. Evidently, that's not good if we have multiple textareas.
 
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// My first idea was to simply add a hidden textarea as the first one, and redefine
 
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// insertTags such that it copied first the last active textareas contents over to that hidden
 
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// field, set the cursor or selection there, let the standard insertTags do its thing, and
 
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// then copy the hidden field's text, cursor position and selection back to the currently
 
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// active field. Unfortunately, that is just as complex as simply copying the whole code
 
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// from wikibits to here and let it work on the right text field in the first place.
 
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var texts = document.getElementsByTagName( 'textarea' );
 
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for ( var i = 0; i < texts.length; i++ ) {
 
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addEvent( texts[i], 'focus', EditTools.registerTextField );
 
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}
 
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// While we're at it, also enable it for input fields
 
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texts = document.getElementsByTagName( 'input' );
 
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for ( var i = 0; i < texts.length; i++ ) {
 
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if ( texts[i].type == 'text' ) {
 
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addEvent( texts[i], 'focus', EditTools.registerTextField );
 
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}
 
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}
 
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insertTags = EditTools.insertTags; // Redefine the global insertTags
 
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},
 
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last_active_textfield: null,
 
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registerTextField: function( evt ) {
 
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var e = evt || window.event;
 
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var node = e.target || e.srcElement;
 
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if ( !node ) {
 
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return;
 
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}
 
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EditTools.last_active_textfield = node.id;
 
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return true;
 
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},
 
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getTextArea: function() {
 
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var txtarea = null;
 
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if ( EditTools.last_active_textfield && EditTools.last_active_textfield != '' )
 
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txtarea = document.getElementById( EditTools.last_active_textfield );
 
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if ( !txtarea ) {
 
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// Fallback option: old behaviour
 
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if ( document.editform ) {
 
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txtarea = document.editform.wpTextbox1;
 
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} else {
 
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// Some alternate form? Take the first one we can find
 
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txtarea = document.getElementsByTagName( 'textarea' );
 
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if ( txtarea.length > 0 ) {
 
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txtarea = txtarea[0];
 
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} else {
 
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txtarea = null;
 
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}
 
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}
 
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}
 
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return txtarea;
 
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},
 
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insertTags: function( tagOpen, tagClose, sampleText ) {
 
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/* Usability initiative compatibility */
 
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if ( typeof $j != 'undefined' && typeof $j.fn.textSelection != 'undefined' ) {
 
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$j( '#wpTextbox1' ).textSelection(
 
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'encapsulateSelection', { 'pre': tagOpen, 'peri': sampleText, 'post': tagClose }
 
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);
 
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return;
 
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}
 
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var txtarea = EditTools.getTextArea ();
 
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if ( !txtarea ) {
 
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return;
 
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}
 
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var selText, isSample = false;
 
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function checkSelectedText() {
 
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if ( !selText ) {
 
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selText = sampleText;
 
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isSample = true;
 
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} else if ( selText.charAt( selText.length - 1 ) == ' ' ) { // Exclude ending space char
 
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selText = selText.substring( 0, selText.length - 1 );
 
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tagClose += ' ';
 
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}
 
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}
 
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if ( document.selection && document.selection.createRange ) { // IE/Opera
 
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// Save window scroll position
 
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var winScroll = 0;
 
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if ( document.documentElement && document.documentElement.scrollTop ) {
 
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winScroll = document.documentElement.scrollTop;
 
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} else if ( document.body ) {
 
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winScroll = document.body.scrollTop;
 
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}
 
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// Get current selection
 
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txtarea.focus();
 
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var range = document.selection.createRange();
 
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selText = range.text;
 
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// Insert tags
 
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checkSelectedText ();
 
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range.text = tagOpen + selText + tagClose;
 
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// Mark sample text as selected
 
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if ( isSample && range.moveStart ) {
 
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if ( window.opera ) {
 
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tagClose = tagClose.replace( /\n/g, '' );
 
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}
 
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range.moveStart( 'character', - tagClose.length - selText.length );
 
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range.moveEnd( 'character', - tagClose.length );
 
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}
 
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range.select();
 
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// Restore window scroll position
 
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if ( document.documentElement && document.documentElement.scrollTop ) {
 
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document.documentElement.scrollTop = winScroll;
 
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} else if ( document.body ) {
 
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document.body.scrollTop = winScroll;
 
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}
 
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} else if ( txtarea.selectionStart || txtarea.selectionStart == '0' ) { // Mozilla
 
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// Save textarea scroll position
 
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var textScroll = txtarea.scrollTop;
 
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// Get current selection
 
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txtarea.focus();
 
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var startPos = txtarea.selectionStart;
 
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var endPos  = txtarea.selectionEnd;
 
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selText = txtarea.value.substring( startPos, endPos );
 
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// Insert tags
 
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checkSelectedText();
 
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txtarea.value = txtarea.value.substring( 0, startPos ) +
 
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tagOpen + selText + tagClose +
 
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txtarea.value.substring( endPos );
 
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// Set new selection
 
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if ( isSample ) {
 
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txtarea.selectionStart = startPos + tagOpen.length;
 
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txtarea.selectionEnd = startPos + tagOpen.length + selText.length;
 
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} else {
 
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txtarea.selectionStart = startPos + tagOpen.length + selText.length + tagClose.length;
 
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txtarea.selectionEnd = txtarea.selectionStart;
 
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}
 
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// Restore textarea scroll position
 
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txtarea.scrollTop = textScroll;
 
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}
 
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}, // end insertTags
 
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setup: function() {
 
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EditTools.fixateWidth();
 
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EditTools.createSelector();
 
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EditTools.enableForAllFields();
 
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}
 
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} // end EditTools
 
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// Do not use addOnloadHook; it runs *before* the onload event fires. At that time, onclick or
 
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// onfocus handlers may not yet be set up properly.
 
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hookEvent( 'load', EditTools.setup );
 
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} // end if
 
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// </source>
 

Revision as of 14:41, 16 September 2010


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