WordPress/wp-admin/js/editor-expand.js

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JavaScript
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/* global tinymce */
window.wp = window.wp || {};
jQuery( document ).ready( function($) {
var $window = $( window ),
$document = $( document ),
$adminBar = $( '#wpadminbar' ),
$contentWrap = $( '#wp-content-wrap' ),
$tools = $( '#wp-content-editor-tools' ),
$visualTop,
$visualEditor,
$textTop = $( '#ed_toolbar' ),
$textEditor = $( '#content' ),
$textEditorClone = $( '<div id="content-textarea-clone"></div>' ),
$bottom = $( '#post-status-info' ),
$statusBar,
buffer = 200,
fullscreen = window.wp.editor && window.wp.editor.fullscreen,
editorInstance,
fixedTop = false,
fixedBottom = false;
$textEditorClone.insertAfter( $textEditor );
// use to enable/disable
$contentWrap.addClass( 'wp-editor-expand' );
$( '#content-resize-handle' ).hide();
$textEditorClone.css( {
'font-family': $textEditor.css( 'font-family' ),
'font-size': $textEditor.css( 'font-size' ),
'line-height': $textEditor.css( 'line-height' ),
'padding': $textEditor.css( 'padding' ),
'padding-top': 37,
'white-space': 'pre-wrap',
'word-wrap': 'break-word'
} );
$textEditor.on( 'focus input propertychange', function() {
textEditorResize();
} );
$textEditor.on( 'keyup', function() {
var range = document.createRange(),
start = $textEditor[0].selectionStart,
end = $textEditor[0].selectionEnd,
textNode = $textEditorClone[0].firstChild,
windowHeight = $window.height(),
offset, cursorTop, cursorBottom, editorTop, editorBottom;
if ( start && end && start !== end ) {
return;
}
range.setStart( textNode, start );
range.setEnd( textNode, end + 1 );
offset = range.getBoundingClientRect();
if ( ! offset.height ) {
return;
}
cursorTop = offset.top;
cursorBottom = cursorTop + offset.height;
editorTop = $adminBar.outerHeight() + $textTop.outerHeight();
editorBottom = windowHeight - $bottom.outerHeight();
if ( cursorTop < editorTop || cursorBottom > editorBottom ) {
window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - windowHeight / 2 );
}
} );
function textEditorResize() {
if ( editorInstance && ! editorInstance.isHidden() ) {
return;
}
var hiddenHeight = $textEditorClone.width( $textEditor.width() ).text( $textEditor.val() + '&nbsp;' ).height(),
textEditorHeight = $textEditor.height();
if ( hiddenHeight < 300 ) {
hiddenHeight = 300;
}
if ( hiddenHeight === textEditorHeight ) {
return;
}
$textEditor.height( hiddenHeight );
adjust( 'resize' );
}
// We need to wait for TinyMCE to initialize.
$document.on( 'tinymce-editor-init.editor-expand', function( event, editor ) {
// Make sure it's the main editor.
if ( editor.id !== 'content' ) {
return;
}
// Copy the editor instance.
editorInstance = editor;
// Resizing will be handled by the autoresize plugin.
editor.theme.resizeTo = function() {};
// Set the minimum height to the initial viewport height.
editor.settings.autoresize_min_height = 300;
// Get the necessary UI elements.
$visualTop = $contentWrap.find( '.mce-toolbar-grp' );
$visualEditor = $contentWrap.find( '.mce-edit-area' );
$statusBar = $contentWrap.find( '.mce-statusbar' ).filter( ':visible' );
// Adjust when switching editor modes.
editor.on( 'show', function() {
setTimeout( function() {
editor.execCommand( 'wpAutoResize' );
adjust( 'resize' );
}, 200 );
} );
// Make sure the cursor is always visible.
// This is not only necessary to keep the cursor between the toolbars,
// but also to scroll the window when the cursor moves out of the viewport to a wpview.
// Setting a buffer > 0 will prevent the browser default.
// Some browsers will scroll to the middle,
// others to the top/bottom of the *window* when moving the cursor out of the viewport.
editor.on( 'keyup', function( event ) {
var VK = tinymce.util.VK,
key = event.keyCode,
offset = getCursorOffset(),
windowHeight = $window.height(),
buffer = 10,
cursorTop, cursorBottom, editorTop, editorBottom;
if ( ! offset ) {
return;
}
cursorTop = offset.top + editor.getContentAreaContainer().getElementsByTagName( 'iframe' )[0].getBoundingClientRect().top;
cursorBottom = cursorTop + offset.height;
cursorTop = cursorTop - buffer;
cursorBottom = cursorBottom + buffer;
editorTop = $adminBar.outerHeight() + $tools.outerHeight() + $visualTop.outerHeight();
editorBottom = windowHeight - $bottom.outerHeight();
if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE ) ) {
window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );
} else if ( cursorBottom > editorBottom ) {
window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );
}
} );
function getCursorOffset() {
var selection = editor.selection,
node = selection.getNode(),
range = selection.getRng(),
view, clone, offset;
if ( tinymce.Env.ie && tinymce.Env.ie < 9 ) {
return;
}
if ( editor.plugins.wpview && ( view = editor.plugins.wpview.getView( node ) ) ) {
offset = view.getBoundingClientRect();
} else if ( selection.isCollapsed() ) {
clone = range.cloneRange();
if ( clone.startContainer.length > 1 ) {
if ( clone.startContainer.length > clone.endOffset ) {
clone.setEnd( clone.startContainer, clone.endOffset + 1 );
} else {
clone.setStart( clone.startContainer, clone.endOffset - 1 );
}
selection.setRng( clone );
offset = selection.getRng().getBoundingClientRect();
selection.setRng( range );
} else {
offset = node.getBoundingClientRect();
}
} else {
offset = range.getBoundingClientRect();
}
if ( ! offset.height ) {
return;
}
return offset;
}
editor.on( 'hide', function() {
textEditorResize();
adjust( 'resize' );
} );
// Adjust when the editor resizes.
editor.on( 'nodechange setcontent keyup FullscreenStateChanged', function() {
adjust( 'resize' );
} );
editor.on( 'wp-toolbar-toggle', function() {
$visualEditor.css( {
paddingTop: $visualTop.outerHeight()
} );
} );
// And adjust "immediately".
// Allow some time to load CSS etc.
setTimeout( function() {
$visualEditor.css( {
paddingTop: $visualTop.outerHeight()
} );
adjust( 'resize' );
}, 500 );
} );
// Adjust when the window is scrolled or resized.
$window.on( 'scroll resize', function( event ) {
adjust( event.type );
} );
// Adjust when exiting fullscreen mode.
fullscreen && fullscreen.pubsub.subscribe( 'hidden', function() {
adjust( 'resize' );
} );
// Adjust when collapsing the menu.
$document.on( 'wp-collapse-menu.editor-expand', function() {
adjust( 'resize' );
} )
// Adjust when changing the columns.
.on( 'postboxes-columnchange.editor-expand', function() {
adjust( 'resize' );
} )
// Adjust when changing the body class.
.on( 'editor-classchange.editor-expand', function() {
adjust( 'resize' );
} );
// Adjust the toolbars based on the active editor mode.
function adjust( eventType ) {
// Make sure we're not in fullscreen mode.
if ( fullscreen && fullscreen.settings.visible ) {
return;
}
var bottomHeight = $bottom.outerHeight(),
windowPos = $window.scrollTop(),
windowHeight = $window.height(),
windowWidth = $window.width(),
adminBarHeight = windowWidth > 600 ? $adminBar.height() : 0,
$top, $editor, visual,
toolsHeight, topPos, topHeight, editorPos, editorHeight, editorWidth, statusBarHeight;
// Visual editor.
if ( editorInstance && ! editorInstance.isHidden() ) {
$top = $visualTop;
$editor = $visualEditor;
visual = true;
// Doesn't hide the panel of 'styleselect'. :(
tinymce.each( editorInstance.controlManager.buttons, function( button ) {
if ( button._active && ( button.type === 'colorbutton' || button.type === 'panelbutton' || button.type === 'menubutton' ) ) {
button.hidePanel();
}
} );
// Text editor.
} else {
$top = $textTop;
$editor = $textEditor;
}
toolsHeight = $tools.outerHeight();
topPos = $top.parent().offset().top;
topHeight = $top.outerHeight();
editorPos = $editor.offset().top;
editorHeight = $editor.outerHeight();
editorWidth = $editor.outerWidth();
statusBarHeight = visual ? $statusBar.outerHeight() : 0;
// Maybe pin the top.
if ( ( ! fixedTop || eventType === 'resize' ) &&
// Handle scrolling down.
( windowPos >= ( topPos - toolsHeight - adminBarHeight ) &&
// Handle scrolling up.
windowPos <= ( topPos - toolsHeight - adminBarHeight + editorHeight - buffer ) ) ) {
fixedTop = true;
$top.css( {
position: 'fixed',
top: adminBarHeight + toolsHeight,
width: $editor.parent().width() - ( $top.outerWidth() - $top.width() ),
borderTop: '1px solid #e5e5e5'
} );
$tools.css( {
position: 'fixed',
top: adminBarHeight,
width: editorWidth + 2
} );
// Maybe unpin the top.
} else if ( fixedTop || eventType === 'resize' ) {
// Handle scrolling up.
if ( windowPos <= ( topPos - toolsHeight - adminBarHeight ) ) {
fixedTop = false;
$top.css( {
position: 'absolute',
top: 0,
borderTop: 'none',
width: $editor.parent().width() - ( $top.outerWidth() - $top.width() )
} );
$tools.css( {
position: 'absolute',
top: 0,
width: $contentWrap.width()
} );
// Handle scrolling down.
} else if ( windowPos >= ( topPos - toolsHeight - adminBarHeight + editorHeight - buffer ) ) {
fixedTop = false;
$top.css( {
position: 'absolute',
top: editorHeight - buffer
} );
$tools.css( {
position: 'absolute',
top: editorHeight - buffer + 1, // border
width: $contentWrap.width()
} );
}
}
// Maybe adjust the bottom bar.
if ( ( ! fixedBottom || eventType === 'resize' ) &&
// + 1 for the border around the .wp-editor-container.
( windowPos + windowHeight ) <= ( editorPos + editorHeight + bottomHeight + statusBarHeight + 1 ) ) {
fixedBottom = true;
$bottom.css( {
position: 'fixed',
bottom: 0,
width: editorWidth + 2,
borderTop: '1px solid #dedede'
} );
} else if ( fixedBottom &&
( windowPos + windowHeight ) > ( editorPos + editorHeight + bottomHeight + statusBarHeight - 1 ) ) {
fixedBottom = false;
$bottom.css( {
position: 'relative',
bottom: 'auto',
width: '100%',
borderTop: 'none'
} );
}
}
textEditorResize();
$tools.css( {
position: 'absolute',
top: 0,
width: $contentWrap.width()
} );
$contentWrap.css( {
paddingTop: $tools.outerHeight()
} );
// This needs to execute after quicktags is ready or a button is added...
setTimeout( function() {
$textEditor.css( {
paddingTop: $textTop.outerHeight() + parseInt( $textEditor.css( 'padding-top' ), 10 )
} );
}, 500 );
});