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' ),
$wrap = $( '#postdivrich' ),
$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,
fullscreen = window.wp.editor && window.wp.editor.fullscreen,
mceEditor,
mceBind = function(){},
mceUnbind = function(){},
fixedTop = false,
fixedBottom = false;
$textEditorClone.insertAfter( $textEditor );
$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'
} );
function textEditorKeyup( event ) {
var VK = jQuery.ui.keyCode,
key = event.keyCode,
range = document.createRange(),
selStart = $textEditor[0].selectionStart,
selEnd = $textEditor[0].selectionEnd,
textNode = $textEditorClone[0].firstChild,
windowHeight = $window.height(),
buffer = 10,
offset, cursorTop, cursorBottom, editorTop, editorBottom;
if ( selStart && selEnd && selStart !== selEnd ) {
return;
}
// These are not TinyMCE ranges.
try {
range.setStart( textNode, selStart );
range.setEnd( textNode, selEnd + 1 );
} catch ( ex ) {}
offset = range.getBoundingClientRect();
if ( ! offset.height ) {
return;
}
cursorTop = offset.top - buffer;
cursorBottom = cursorTop + offset.height + buffer;
editorTop = $adminBar.outerHeight() + $tools.outerHeight() + $textTop.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 textEditorResize() {
if ( mceEditor && ! mceEditor.isHidden() ) {
return;
}
var textEditorHeight = $textEditor.height(),
hiddenHeight;
$textEditorClone.width( $textEditor.width() );
$textEditorClone.text( $textEditor.val() + '&nbsp;' );
hiddenHeight = $textEditorClone.height();
if ( hiddenHeight < 300 ) {
hiddenHeight = 300;
}
if ( hiddenHeight === textEditorHeight ) {
return;
}
$textEditor.height( hiddenHeight );
adjust();
}
// 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.
mceEditor = editor;
// 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' );
function mceGetCursorOffset() {
var node = editor.selection.getNode(),
view, offset;
if ( editor.plugins.wpview && ( view = editor.plugins.wpview.getView( node ) ) ) {
offset = view.getBoundingClientRect();
} else {
offset = node.getBoundingClientRect();
}
return offset.height ? offset : false;
}
// 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.
function mceKeyup( event ) {
var VK = tinymce.util.VK,
key = event.keyCode,
offset = mceGetCursorOffset(),
windowHeight = $window.height(),
buffer = 10,
cursorTop, cursorBottom, editorTop, editorBottom;
if ( ! offset ) {
return;
}
cursorTop = offset.top + editor.getContentAreaContainer().firstChild.getBoundingClientRect().top;
cursorBottom = cursorTop + offset.height;
cursorTop = cursorTop - buffer;
cursorBottom = cursorBottom + buffer;
editorTop = $adminBar.outerHeight() + $tools.outerHeight() + $visualTop.outerHeight();
editorBottom = windowHeight - $bottom.outerHeight();
// Don't scroll if the node is taller than the visible part of the editor
if ( editorBottom - editorTop < offset.height ) {
return;
}
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 );
}
}
// Adjust when switching editor modes.
function mceShow() {
setTimeout( function() {
editor.execCommand( 'wpAutoResize' );
adjust();
}, 300 );
}
function mceHide() {
textEditorResize();
adjust();
}
mceBind = function() {
editor.on( 'keyup', mceKeyup );
editor.on( 'show', mceShow );
editor.on( 'hide', mceHide );
// Adjust when the editor resizes.
editor.on( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );
};
mceUnbind = function() {
editor.off( 'keyup', mceKeyup );
editor.off( 'show', mceShow );
editor.off( 'hide', mceHide );
editor.off( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );
};
if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
// Adjust "immediately"
mceBind();
initialResize( adjust );
}
} );
// Adjust the toolbars based on the active editor mode.
function adjust( type ) {
// 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,
resize = type !== 'scroll',
visual = ( mceEditor && ! mceEditor.isHidden() ),
buffer = 200,
$top, $editor,
toolsHeight, topPos, topHeight, editorPos, editorHeight, editorWidth, statusBarHeight;
if ( visual ) {
$top = $visualTop;
$editor = $visualEditor;
} 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 || 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 || 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 || 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 || resize ) &&
( windowPos + windowHeight ) > ( editorPos + editorHeight + bottomHeight + statusBarHeight - 1 ) ) {
fixedBottom = false;
$bottom.css( {
position: 'relative',
bottom: 'auto',
width: '100%',
borderTop: 'none'
} );
}
if ( resize ) {
$contentWrap.css( {
paddingTop: $tools.outerHeight()
} );
if ( visual ) {
$visualEditor.css( {
paddingTop: $visualTop.outerHeight()
} );
} else {
$textEditor.css( {
marginTop: $textTop.outerHeight()
} );
$textEditorClone.width( $textEditor.width() );
}
}
}
function fullscreenHide() {
textEditorResize();
adjust();
}
function initialResize( callback ) {
for ( var i = 1; i < 6; i++ ) {
setTimeout( callback, 500 * i );
}
}
function on() {
// Scroll to the top when triggering this from JS.
// Ensures toolbars are pinned properly.
if ( window.pageYOffset && window.pageYOffset > 130 ) {
window.scrollTo( window.pageXOffset, 0 );
}
$wrap.addClass( 'wp-editor-expand' );
// Adjust when the window is scrolled or resized.
$window.on( 'scroll.editor-expand resize.editor-expand', function( event ) {
adjust( event.type );
} );
// Adjust when collapsing the menu, changing the columns, changing the body class.
$document.on( 'wp-collapse-menu.editor-expand postboxes-columnchange.editor-expand editor-classchange.editor-expand', adjust );
$textEditor.on( 'focus.editor-expand input.editor-expand propertychange.editor-expand', textEditorResize );
$textEditor.on( 'keyup.editor-expand', textEditorKeyup );
mceBind();
// Adjust when entering/exiting fullscreen mode.
fullscreen && fullscreen.pubsub.subscribe( 'hidden', fullscreenHide );
if ( mceEditor ) {
mceEditor.settings.wp_autoresize_on = true;
mceEditor.execCommand( 'wpAutoResizeOn' );
if ( ! mceEditor.isHidden() ) {
mceEditor.execCommand( 'wpAutoResize' );
}
}
if ( ! mceEditor || mceEditor.isHidden() ) {
textEditorResize();
}
adjust();
}
function off() {
var height = window.getUserSetting('ed_size');
// Scroll to the top when triggering this from JS.
// Ensures toolbars are reset properly.
if ( window.pageYOffset && window.pageYOffset > 130 ) {
window.scrollTo( window.pageXOffset, 0 );
}
$wrap.removeClass( 'wp-editor-expand' );
// Adjust when the window is scrolled or resized.
$window.off( 'scroll.editor-expand resize.editor-expand' );
// Adjust when collapsing the menu, changing the columns, changing the body class.
$document.off( 'wp-collapse-menu.editor-expand postboxes-columnchange.editor-expand editor-classchange.editor-expand', adjust );
$textEditor.off( 'focus.editor-expand input.editor-expand propertychange.editor-expand', textEditorResize );
$textEditor.off( 'keyup.editor-expand', textEditorKeyup );
mceUnbind();
// Adjust when entering/exiting fullscreen mode.
fullscreen && fullscreen.pubsub.unsubscribe( 'hidden', fullscreenHide );
// Reset all css
$.each( [ $visualTop, $textTop, $tools, $bottom, $contentWrap, $visualEditor, $textEditor ], function( i, element ) {
element && element.attr( 'style', '' );
});
if ( mceEditor ) {
mceEditor.settings.wp_autoresize_on = false;
mceEditor.execCommand( 'wpAutoResizeOff' );
if ( ! mceEditor.isHidden() ) {
$textEditor.hide();
if ( height ) {
mceEditor.theme.resizeTo( null, height );
}
}
}
if ( height ) {
$textEditor.height( height );
}
}
// Start on load
if ( $wrap.hasClass( 'wp-editor-expand' ) ) {
on();
// Ideally we need to resize just after CSS has fully loaded and QuickTags is ready.
if ( $contentWrap.hasClass( 'html-active' ) ) {
initialResize( function() {
adjust();
textEditorResize();
} );
}
}
// Show the on/off checkbox
$( '#adv-settings .editor-expand' ).show();
$( '#editor-expand-toggle' ).on( 'change.editor-expand', function() {
if ( $(this).prop( 'checked' ) ) {
on();
window.setUserSetting( 'editor_expand', 'on' );
} else {
off();
window.setUserSetting( 'editor_expand', 'off' );
}
});
// Expose on() and off()
window.editorExpand = {
on: on,
off: off
};
});