// <source lang="javascript">

/*
EditTools support: add a selector, change into true buttons, enable for all text input fields
The special characters to insert are defined at [[MediaWiki:Edittools]].
*/

// Globals: getElementsByClassName, hookEvent, addEvent (from wikibits.js)

if ( load_edittools == true ) { // Legacy. Do we really need this?
if ( typeof( EditTools_set_focus ) == 'undefined' ) {
var EditTools_set_focus = true;
}

if ( typeof( EditTools_set_focus_initially ) == 'undefined' ) {
var EditTools_set_focus_initially = EditTools_set_focus;
}

if ( typeof( EditTools_initial_subset ) == 'undefined' ) {
var EditTools_initial_subset = 0;
}

var EditTools = {
createSelector: function() {
var spec = document.getElementById( 'specialchars' );
if ( !spec ) {
return;
}
var sb = getElementsByClassName( spec, 'p', 'specialbasic' );
if ( sb.length <= 1 ) {
return; // Only care if there is more than one
}

var sel = document.createElement( 'select' );
sel.style.display = 'inline';
// sel.setAttribute( 'onchange', 'EditTools.chooseCharSubset( selectedIndex, true );' );
// Apparently, this doesn't work on IE6. Use an explicit event handling function instead:
sel.onchange = EditTools.handleOnchange;

var initial = EditTools_initial_subset;
if ( isNaN( initial ) || initial < 0 || initial >= sb.length ) {
initial = 0;
}

for ( var i = 0; i < sb.length; i++ ) {
var o = document.createElement( 'option' );
// Ugh. We have encoded Unicode characters in the names...
var id = sb[i].id.replace( /.([0-9A-F][0-9A-F])/g, '%$1' ).replace( /_/g, ' ' );
if ( i == initial ) {
o.selected = 'selected';
}
o.appendChild( document.createTextNode( decodeURIComponent( id ) ) );
sel.appendChild( o );
}

spec.insertBefore( sel, spec.firstChild );

EditTools.chooseCharSubset(
initial,
( wgAction != 'submit' ) &&
EditTools_set_focus_initially &&
( wgCanonicalNamespace != 'Special' || wgCanonicalSpecialPageName != 'Upload' )
);
},

handleOnchange: function( evt ) {
var e    = evt || window.event;      // W3C, IE
var node = e.target || e.srcElement; // W3C, IE

EditTools.chooseCharSubset( node.selectedIndex, true );
return true;
},

chooseCharSubset: function( selected, set_focus ) {
var sb = getElementsByClassName( document.getElementById( 'specialchars' ), 'p', 'specialbasic' );
EditTools.makeButtons( sb[selected] );
for ( var i = 0; i < sb.length; i++ ) {
sb[i].style.display = i == selected ? 'inline' : 'none';
}
if ( set_focus && EditTools_set_focus ) {
var txtarea = EditTools.getTextArea();
if ( txtarea ) {
txtarea.focus();
}
}
},

fixateWidth: function() {
var edit_bar = document.getElementById( 'specialchars' );
if ( !edit_bar ) {
return;
}
// Try to fixate the width of that bar, otherwise IE6 may make it wider, which will lead to
// a table re-layout on the upload form resulting in the right column extending beyond the
// right edge of the window.
edit_bar.setAttribute( 'width', '' + ( edit_bar.clientWidth || edit_bar.offsetWidth ) );
edit_bar.style.maxWidth = '' + ( edit_bar.clientWidth || edit_bar.offsetWidth ) + 'px';
// If we're inside a table, fixate the containing table cell, too.
var parent = edit_bar.parentNode;
while ( parent && parent != document.body && parent.nodeName.toLowerCase() != 'td' ) {
parent = parent.parentNode;
}
if ( parent && parent != document.body ) {
parent.setAttribute( 'width', '' + ( parent.clientWidth || parent.offsetWidth ) );
parent.style.maxWidth = '' + ( parent.clientWidth || parent.offsetWidth ) + 'px';
}
},

makeButtons: function( section ) {
var edit_bar = section || document.getElementById( 'specialchars' );
if ( !edit_bar ) {
return;
}
var links = edit_bar.getElementsByTagName( 'a' );
// 'links' is a *live* collection!
var b = null;
while ( links.length ) {
b = document.createElement( 'input' );
b.type = 'button';
b.style.fontSize = '0.9em';
b.style.paddingLeft = '1px';
b.style.paddingRight = '1px';
b.style.marginLeft = '1px';
b.onclick = links[0].onclick;
b.value = links[0].firstChild.data;
var parent = links[0].parentNode;
parent.replaceChild( b, links[0] ); // This removes links[0] from links!
b.blur(); // IE6 insists on marking some buttons as having the focus...
var margin_added = false;
// Remove text nodes (nodeType == Node.TEXT_NODE, but IE6 doesn't know that...)
// Insert some spacing where desired.
while ( b.nextSibling && b.nextSibling.nodeType == 3 ) {
if ( !margin_added && b.nextSibling.data.search( /\S/ ) >= 0 ) {
b.style.marginRight = '4px';
margin_added = true;
}
parent.removeChild( b.nextSibling );
}
}
},

enableForAllFields: function() {
if ( typeof( insertTags ) != 'function' ) {
return;
}
// insertTags from the site-wide /skins-1.5/common/edit.js just inserts in the first
// textarea in the document. Evidently, that's not good if we have multiple textareas.
// My first idea was to simply add a hidden textarea as the first one, and redefine
// insertTags such that it copied first the last active textareas contents over to that hidden
// field, set the cursor or selection there, let the standard insertTags do its thing, and
// then copy the hidden field's text, cursor position and selection back to the currently
// active field. Unfortunately, that is just as complex as simply copying the whole code
// from wikibits to here and let it work on the right text field in the first place.
var texts = document.getElementsByTagName( 'textarea' );
for ( var i = 0; i < texts.length; i++ ) {
$( texts[i] ).focus( EditTools.registerTextField );
}
// While we're at it, also enable it for input fields
texts = document.getElementsByTagName( 'input' );
for ( var i = 0; i < texts.length; i++ ) {
if ( texts[i].type == 'text' ) {
$( texts[i] ).focus( EditTools.registerTextField );
}
}
insertTags = EditTools.insertTags; // Redefine the global insertTags
},

last_active_textfield: null,

registerTextField: function( evt ) {
var e = evt || window.event;
var node = e.target || e.srcElement;
if ( !node ) {
return;
}
EditTools.last_active_textfield = node.id;
return true;
},

getTextArea: function() {
var txtarea = null;
if ( EditTools.last_active_textfield && EditTools.last_active_textfield != '' )
txtarea = document.getElementById( EditTools.last_active_textfield );
if ( !txtarea ) {
// Fallback option: old behaviour
if ( document.editform ) {
txtarea = document.editform.wpTextbox1;
} else {
// Some alternate form? Take the first one we can find
txtarea = document.getElementsByTagName( 'textarea' );
if ( txtarea.length > 0 ) {
txtarea = txtarea[0];
} else {
txtarea = null;
}
}
}
return txtarea;
},

insertTags: function( tagOpen, tagClose, sampleText ) {
/* Usability initiative compatibility */
if ( typeof $j != 'undefined' && typeof $j.fn.textSelection != 'undefined' ) {
$j( '#wpTextbox1' ).textSelection(
'encapsulateSelection', { 'pre': tagOpen, 'peri': sampleText, 'post': tagClose }
);
return;
}
var txtarea = EditTools.getTextArea ();
if ( !txtarea ) {
return;
}
var selText, isSample = false;

function checkSelectedText() {
if ( !selText ) {
selText = sampleText;
isSample = true;
} else if ( selText.charAt( selText.length - 1 ) == ' ' ) { // Exclude ending space char
selText = selText.substring( 0, selText.length - 1 );
tagClose += ' ';
}
}

if ( document.selection && document.selection.createRange ) { // IE/Opera
// Save window scroll position
var winScroll = 0;
if ( document.documentElement && document.documentElement.scrollTop ) {
winScroll = document.documentElement.scrollTop;
} else if ( document.body ) {
winScroll = document.body.scrollTop;
}
// Get current selection
txtarea.focus();
var range = document.selection.createRange();
selText = range.text;
// Insert tags
checkSelectedText ();
range.text = tagOpen + selText + tagClose;
// Mark sample text as selected
if ( isSample && range.moveStart ) {
if ( window.opera ) {
tagClose = tagClose.replace( /\n/g, '' );
}
range.moveStart( 'character', - tagClose.length - selText.length );
range.moveEnd( 'character', - tagClose.length );
}
range.select();
// Restore window scroll position
if ( document.documentElement && document.documentElement.scrollTop ) {
document.documentElement.scrollTop = winScroll;
} else if ( document.body ) {
document.body.scrollTop = winScroll;
}
} else if ( txtarea.selectionStart || txtarea.selectionStart == '0' ) { // Mozilla
// Save textarea scroll position
var textScroll = txtarea.scrollTop;
// Get current selection
txtarea.focus();
var startPos = txtarea.selectionStart;
var endPos   = txtarea.selectionEnd;
selText = txtarea.value.substring( startPos, endPos );
// Insert tags
checkSelectedText();
txtarea.value = txtarea.value.substring( 0, startPos ) +
tagOpen + selText + tagClose +
txtarea.value.substring( endPos );
// Set new selection
if ( isSample ) {
txtarea.selectionStart = startPos + tagOpen.length;
txtarea.selectionEnd = startPos + tagOpen.length + selText.length;
} else {
txtarea.selectionStart = startPos + tagOpen.length + selText.length + tagClose.length;
txtarea.selectionEnd = txtarea.selectionStart;
}
// Restore textarea scroll position
txtarea.scrollTop = textScroll;
}
}, // end insertTags

setup: function() {
EditTools.fixateWidth();
EditTools.createSelector();
EditTools.enableForAllFields();
}

} // end EditTools

// Do not use addOnloadHook; it runs *before* the onload event fires. At that time, onclick or
// onfocus handlers may not yet be set up properly.
hookEvent( 'load', EditTools.setup );

} // end if

// </source>