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plugin.js
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/**
* @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @ignore
* File overview: Clipboard support.
*/
//
// COPY & PASTE EXECUTION FLOWS:
// -- CTRL+C
// * if ( isCustomCopyCutSupported )
// * dataTransfer.setData( 'text/html', getSelectedHtml )
// * else
// * browser's default behavior
// -- CTRL+X
// * listen onKey (onkeydown)
// * fire 'saveSnapshot' on editor
// * if ( isCustomCopyCutSupported )
// * dataTransfer.setData( 'text/html', getSelectedHtml )
// * extractSelectedHtml // remove selected contents
// * else
// * browser's default behavior
// * deferred second 'saveSnapshot' event
// -- CTRL+V
// * listen onKey (onkeydown)
// * simulate 'beforepaste' for non-IEs on editable
// * listen 'onpaste' on editable ('onbeforepaste' for IE)
// * fire 'beforePaste' on editor
// * if ( !canceled && ( htmlInDataTransfer || !external paste) && dataTransfer is not empty ) getClipboardDataByPastebin
// * fire 'paste' on editor
// * !canceled && fire 'afterPaste' on editor
// -- Copy command
// * tryToCutCopy
// * execCommand
// * !success && notification
// -- Cut command
// * fixCut
// * tryToCutCopy
// * execCommand
// * !success && notification
// -- Paste command
// * fire 'paste' on editable ('beforepaste' for IE)
// * !canceled && execCommand 'paste'
// -- Paste from native context menu & menubar
// (Fx & Webkits are handled in 'paste' default listener.
// Opera cannot be handled at all because it doesn't fire any events
// Special treatment is needed for IE, for which is this part of doc)
// * listen 'onpaste'
// * cancel native event
// * fire 'beforePaste' on editor
// * if ( !canceled && ( htmlInDataTransfer || !external paste) && dataTransfer is not empty ) getClipboardDataByPastebin
// * execIECommand( 'paste' ) -> this fires another 'paste' event, so cancel it
// * fire 'paste' on editor
// * !canceled && fire 'afterPaste' on editor
//
//
// PASTE EVENT - PREPROCESSING:
// -- Possible dataValue types: auto, text, html.
// -- Possible dataValue contents:
// * text (possible \n\r)
// * htmlified text (text + br,div,p - no presentational markup & attrs - depends on browser)
// * html
// -- Possible flags:
// * htmlified - if true then content is a HTML even if no markup inside. This flag is set
// for content from editable pastebins, because they 'htmlify' pasted content.
//
// -- Type: auto:
// * content: htmlified text -> filter, unify text markup (brs, ps, divs), set type: text
// * content: html -> filter, set type: html
// -- Type: text:
// * content: htmlified text -> filter, unify text markup
// * content: html -> filter, strip presentational markup, unify text markup
// -- Type: html:
// * content: htmlified text -> filter, unify text markup
// * content: html -> filter
//
// -- Phases:
// * if dataValue is empty copy data from dataTransfer to dataValue (priority 1)
// * filtering (priorities 3-5) - e.g. pastefromword filters
// * content type sniffing (priority 6)
// * markup transformations for text (priority 6)
//
// DRAG & DROP EXECUTION FLOWS:
// -- Drag
// * save to the global object:
// * drag timestamp (with 'cke-' prefix),
// * selected html,
// * drag range,
// * editor instance.
// * put drag timestamp into event.dataTransfer.text
// -- Drop
// * if events text == saved timestamp && editor == saved editor
// internal drag & drop occurred
// * getRangeAtDropPosition
// * create bookmarks for drag and drop ranges starting from the end of the document
// * dragRange.deleteContents()
// * fire 'paste' with saved html and drop range
// * if events text == saved timestamp && editor != saved editor
// cross editor drag & drop occurred
// * getRangeAtDropPosition
// * fire 'paste' with saved html
// * dragRange.deleteContents()
// * FF: refreshCursor on afterPaste
// * if events text != saved timestamp
// drop form external source occurred
// * getRangeAtDropPosition
// * if event contains html data then fire 'paste' with html
// * else if event contains text data then fire 'paste' with encoded text
// * FF: refreshCursor on afterPaste
'use strict';
( function() {
var clipboardIdDataType;
// Register the plugin.
CKEDITOR.plugins.add( 'clipboard', {
requires: 'dialog,notification,toolbar',
// jscs:disable maximumLineLength
lang: 'af,ar,az,bg,bn,bs,ca,cs,cy,da,de,de-ch,el,en,en-au,en-ca,en-gb,eo,es,es-mx,et,eu,fa,fi,fo,fr,fr-ca,gl,gu,he,hi,hr,hu,id,is,it,ja,ka,km,ko,ku,lt,lv,mk,mn,ms,nb,nl,no,oc,pl,pt,pt-br,ro,ru,si,sk,sl,sq,sr,sr-latn,sv,th,tr,tt,ug,uk,vi,zh,zh-cn', // %REMOVE_LINE_CORE%
// jscs:enable maximumLineLength
icons: 'copy,copy-rtl,cut,cut-rtl,paste,paste-rtl', // %REMOVE_LINE_CORE%
hidpi: true, // %REMOVE_LINE_CORE%
init: function( editor ) {
var filterType,
filtersFactory = filtersFactoryFactory( editor );
if ( editor.config.forcePasteAsPlainText ) {
filterType = 'plain-text';
} else if ( editor.config.pasteFilter ) {
filterType = editor.config.pasteFilter;
}
// On Webkit the pasteFilter defaults 'semantic-content' because pasted data is so terrible
// that it must be always filtered.
else if ( CKEDITOR.env.webkit && !( 'pasteFilter' in editor.config ) ) {
filterType = 'semantic-content';
}
editor.pasteFilter = filtersFactory.get( filterType );
initPasteClipboard( editor );
initDragDrop( editor );
CKEDITOR.dialog.add( 'paste', CKEDITOR.getUrl( this.path + 'dialogs/paste.js' ) );
// Convert image file (if present) to base64 string for Firefox. Do it as the first
// step as the conversion is asynchronous and should hold all further paste processing.
if ( CKEDITOR.env.gecko ) {
var supportedImageTypes = [ 'image/png', 'image/jpeg', 'image/gif' ],
latestId;
editor.on( 'paste', function( evt ) {
var dataObj = evt.data,
data = dataObj.dataValue,
dataTransfer = dataObj.dataTransfer;
// If data empty check for image content inside data transfer. https://dev.ckeditor.com/ticket/16705
if ( !data && dataObj.method == 'paste' && dataTransfer && dataTransfer.getFilesCount() == 1 && latestId != dataTransfer.id ) {
var file = dataTransfer.getFile( 0 );
if ( CKEDITOR.tools.indexOf( supportedImageTypes, file.type ) != -1 ) {
var fileReader = new FileReader();
// Convert image file to img tag with base64 image.
fileReader.addEventListener( 'load', function() {
evt.data.dataValue = '<img src="' + fileReader.result + '" />';
editor.fire( 'paste', evt.data );
}, false );
// Proceed with normal flow if reading file was aborted.
fileReader.addEventListener( 'abort', function() {
editor.fire( 'paste', evt.data );
}, false );
// Proceed with normal flow if reading file failed.
fileReader.addEventListener( 'error', function() {
editor.fire( 'paste', evt.data );
}, false );
fileReader.readAsDataURL( file );
latestId = dataObj.dataTransfer.id;
evt.stop();
}
}
}, null, null, 1 );
}
editor.on( 'paste', function( evt ) {
// Init `dataTransfer` if `paste` event was fired without it, so it will be always available.
if ( !evt.data.dataTransfer ) {
evt.data.dataTransfer = new CKEDITOR.plugins.clipboard.dataTransfer();
}
// If dataValue is already set (manually or by paste bin), so do not override it.
if ( evt.data.dataValue ) {
return;
}
var dataTransfer = evt.data.dataTransfer,
// IE support only text data and throws exception if we try to get html data.
// This html data object may also be empty if we drag content of the textarea.
value = dataTransfer.getData( 'text/html' );
if ( value ) {
evt.data.dataValue = value;
evt.data.type = 'html';
} else {
// Try to get text data otherwise.
value = dataTransfer.getData( 'text/plain' );
if ( value ) {
evt.data.dataValue = editor.editable().transformPlainTextToHtml( value );
evt.data.type = 'text';
}
}
}, null, null, 1 );
editor.on( 'paste', function( evt ) {
var data = evt.data.dataValue,
blockElements = CKEDITOR.dtd.$block;
// Filter webkit garbage.
if ( data.indexOf( 'Apple-' ) > -1 ) {
// Replace special webkit's with simple space, because webkit
// produces them even for normal spaces.
data = data.replace( /<span class="Apple-converted-space"> <\/span>/gi, ' ' );
// Strip <span> around white-spaces when not in forced 'html' content type.
// This spans are created only when pasting plain text into Webkit,
// but for safety reasons remove them always.
if ( evt.data.type != 'html' ) {
data = data.replace( /<span class="Apple-tab-span"[^>]*>([^<]*)<\/span>/gi, function( all, spaces ) {
// Replace tabs with 4 spaces like Fx does.
return spaces.replace( /\t/g, ' ' );
} );
}
// This br is produced only when copying & pasting HTML content.
if ( data.indexOf( '<br class="Apple-interchange-newline">' ) > -1 ) {
evt.data.startsWithEOL = 1;
evt.data.preSniffing = 'html'; // Mark as not text.
data = data.replace( /<br class="Apple-interchange-newline">/, '' );
}
// Remove all other classes.
data = data.replace( /(<[^>]+) class="Apple-[^"]*"/gi, '$1' );
}
// Strip editable that was copied from inside. (https://dev.ckeditor.com/ticket/9534)
if ( data.match( /^<[^<]+cke_(editable|contents)/i ) ) {
var tmp,
editable_wrapper,
wrapper = new CKEDITOR.dom.element( 'div' );
wrapper.setHtml( data );
// Verify for sure and check for nested editor UI parts. (https://dev.ckeditor.com/ticket/9675)
while ( wrapper.getChildCount() == 1 &&
( tmp = wrapper.getFirst() ) &&
tmp.type == CKEDITOR.NODE_ELEMENT && // Make sure first-child is element.
( tmp.hasClass( 'cke_editable' ) || tmp.hasClass( 'cke_contents' ) ) ) {
wrapper = editable_wrapper = tmp;
}
// If editable wrapper was found strip it and bogus <br> (added on FF).
if ( editable_wrapper )
data = editable_wrapper.getHtml().replace( /<br>$/i, '' );
}
if ( CKEDITOR.env.ie ) {
// <p> -> <p> (br.cke-pasted-remove will be removed later)
data = data.replace( /^ (?: |\r\n)?<(\w+)/g, function( match, elementName ) {
if ( elementName.toLowerCase() in blockElements ) {
evt.data.preSniffing = 'html'; // Mark as not a text.
return '<' + elementName;
}
return match;
} );
} else if ( CKEDITOR.env.webkit ) {
// </p><div><br></div> -> </p><br>
// We don't mark br, because this situation can happen for htmlified text too.
data = data.replace( /<\/(\w+)><div><br><\/div>$/, function( match, elementName ) {
if ( elementName in blockElements ) {
evt.data.endsWithEOL = 1;
return '</' + elementName + '>';
}
return match;
} );
} else if ( CKEDITOR.env.gecko ) {
// Firefox adds bogus <br> when user pasted text followed by space(s).
data = data.replace( /(\s)<br>$/, '$1' );
}
evt.data.dataValue = data;
}, null, null, 3 );
editor.on( 'paste', function( evt ) {
var dataObj = evt.data,
type = editor._.nextPasteType || dataObj.type,
data = dataObj.dataValue,
trueType,
// Default is 'html'.
defaultType = editor.config.clipboard_defaultContentType || 'html',
transferType = dataObj.dataTransfer.getTransferType( editor ),
isExternalPaste = transferType == CKEDITOR.DATA_TRANSFER_EXTERNAL,
isActiveForcePAPT = editor.config.forcePasteAsPlainText === true;
// If forced type is 'html' we don't need to know true data type.
if ( type == 'html' || dataObj.preSniffing == 'html' ) {
trueType = 'html';
} else {
trueType = recogniseContentType( data );
}
delete editor._.nextPasteType;
// Unify text markup.
if ( trueType == 'htmlifiedtext' ) {
data = htmlifiedTextHtmlification( editor.config, data );
}
// Strip presentational markup & unify text markup.
// Forced plain text (dialog or forcePAPT).
// Note: we do not check dontFilter option in this case, because forcePAPT was implemented
// before pasteFilter and pasteFilter is automatically used on Webkit&Blink since 4.5, so
// forcePAPT should have priority as it had before 4.5.
if ( type == 'text' && trueType == 'html' ) {
data = filterContent( editor, data, filtersFactory.get( 'plain-text' ) );
}
// External paste and pasteFilter exists and filtering isn't disabled.
// Or force filtering even for internal and cross-editor paste, when forcePAPT is active (#620).
else if ( isExternalPaste && editor.pasteFilter && !dataObj.dontFilter || isActiveForcePAPT ) {
data = filterContent( editor, data, editor.pasteFilter );
}
if ( dataObj.startsWithEOL ) {
data = '<br data-cke-eol="1">' + data;
}
if ( dataObj.endsWithEOL ) {
data += '<br data-cke-eol="1">';
}
if ( type == 'auto' ) {
type = ( trueType == 'html' || defaultType == 'html' ) ? 'html' : 'text';
}
dataObj.type = type;
dataObj.dataValue = data;
delete dataObj.preSniffing;
delete dataObj.startsWithEOL;
delete dataObj.endsWithEOL;
}, null, null, 6 );
// Inserts processed data into the editor at the end of the
// events chain.
editor.on( 'paste', function( evt ) {
var data = evt.data;
if ( data.dataValue ) {
editor.insertHtml( data.dataValue, data.type, data.range );
// Defer 'afterPaste' so all other listeners for 'paste' will be fired first.
// Fire afterPaste only if paste inserted some HTML.
setTimeout( function() {
editor.fire( 'afterPaste' );
}, 0 );
}
}, null, null, 1000 );
editor.on( 'pasteDialog', function( evt ) {
// TODO it's possible that this setTimeout is not needed any more,
// because of changes introduced in the same commit as this comment.
// Editor.getClipboardData adds listener to the dialog's events which are
// fired after a while (not like 'showDialog').
setTimeout( function() {
// Open default paste dialog.
editor.openDialog( 'paste', evt.data );
}, 0 );
} );
}
} );
function firePasteEvents( editor, data, withBeforePaste ) {
if ( !data.type ) {
data.type = 'auto';
}
if ( withBeforePaste ) {
// Fire 'beforePaste' event so clipboard flavor get customized
// by other plugins.
if ( editor.fire( 'beforePaste', data ) === false )
return false; // Event canceled
}
// Do not fire paste if there is no data (dataValue and dataTranfser are empty).
// This check should be done after firing 'beforePaste' because for native paste
// 'beforePaste' is by default fired even for empty clipboard.
if ( !data.dataValue && data.dataTransfer.isEmpty() ) {
return false;
}
if ( !data.dataValue ) {
data.dataValue = '';
}
// Because of FF bug we need to use this hack, otherwise cursor is hidden
// or it is not possible to move it (https://dev.ckeditor.com/ticket/12420).
// Also, check that editor.toolbox exists, because the toolbar plugin might not be loaded (https://dev.ckeditor.com/ticket/13305).
if ( CKEDITOR.env.gecko && data.method == 'drop' && editor.toolbox ) {
editor.once( 'afterPaste', function() {
editor.toolbox.focus();
} );
}
return editor.fire( 'paste', data );
}
function initPasteClipboard( editor ) {
var clipboard = CKEDITOR.plugins.clipboard,
preventBeforePasteEvent = 0,
preventPasteEvent = 0,
inReadOnly = 0;
addListeners();
addButtonsCommands();
/**
* Gets clipboard data by directly accessing the clipboard (IE only) or opening the paste dialog window.
*
* editor.getClipboardData( function( data ) {
* if ( data )
* alert( data.type + ' ' + data.dataValue );
* } );
*
* @member CKEDITOR.editor
* @param {Function/Object} callbackOrOptions For function, see the `callback` parameter documentation. The object was used before 4.7.0 with the `title` property, to set the paste dialog's title.
* @param {Function} callback A function that will be executed with the `data` property of the
* {@link CKEDITOR.editor#event-paste paste event} or `null` if none of the capturing methods succeeded.
* Since 4.7.0 the `callback` should be provided as a first argument, just like in the example above. This parameter will be removed in
* an upcoming major release.
*/
editor.getClipboardData = function( callbackOrOptions, callback ) {
var beforePasteNotCanceled = false,
dataType = 'auto';
// Options are optional - args shift.
if ( !callback ) {
callback = callbackOrOptions;
callbackOrOptions = null;
}
// Listen at the end of listeners chain to see if event wasn't canceled
// and to retrieve modified data.type.
editor.on( 'beforePaste', onBeforePaste, null, null, 1000 );
// Listen with maximum priority to handle content before everyone else.
// This callback will handle paste event that will be fired if direct
// access to the clipboard succeed in IE.
editor.on( 'paste', onPaste, null, null, 0 );
// If command didn't succeed (only IE allows to access clipboard and only if
// user agrees) invoke callback with null, meaning that paste is not blocked.
if ( getClipboardDataDirectly() === false ) {
// Direct access to the clipboard wasn't successful so remove listener.
editor.removeListener( 'paste', onPaste );
// If beforePaste was canceled do not open dialog.
// Add listeners only if dialog really opened. 'pasteDialog' can be canceled.
if ( editor._.forcePasteDialog && beforePasteNotCanceled && editor.fire( 'pasteDialog' ) ) {
editor.on( 'pasteDialogCommit', onDialogCommit );
// 'dialogHide' will be fired after 'pasteDialogCommit'.
editor.on( 'dialogHide', function( evt ) {
evt.removeListener();
evt.data.removeListener( 'pasteDialogCommit', onDialogCommit );
// Notify even if user canceled dialog (clicked 'cancel', ESC, etc).
if ( !evt.data._.committed ) {
callback( null );
}
} );
} else {
callback( null );
}
}
function onPaste( evt ) {
evt.removeListener();
evt.cancel();
callback( evt.data );
}
function onBeforePaste( evt ) {
evt.removeListener();
beforePasteNotCanceled = true;
dataType = evt.data.type;
}
function onDialogCommit( evt ) {
evt.removeListener();
// Cancel pasteDialogCommit so paste dialog won't automatically fire
// 'paste' evt by itself.
evt.cancel();
callback( {
type: dataType,
dataValue: evt.data.dataValue,
dataTransfer: evt.data.dataTransfer,
method: 'paste'
} );
}
};
function addButtonsCommands() {
addButtonCommand( 'Cut', 'cut', createCutCopyCmd( 'cut' ), 10, 1 );
addButtonCommand( 'Copy', 'copy', createCutCopyCmd( 'copy' ), 20, 4 );
addButtonCommand( 'Paste', 'paste', createPasteCmd(), 30, 8 );
// Force adding touchend handler to paste button (#595).
if ( !editor._.pasteButtons ) {
editor._.pasteButtons = [];
}
editor._.pasteButtons.push( 'Paste' );
function addButtonCommand( buttonName, commandName, command, toolbarOrder, ctxMenuOrder ) {
var lang = editor.lang.clipboard[ commandName ];
editor.addCommand( commandName, command );
editor.ui.addButton && editor.ui.addButton( buttonName, {
label: lang,
command: commandName,
toolbar: 'clipboard,' + toolbarOrder
} );
// If the "menu" plugin is loaded, register the menu item.
if ( editor.addMenuItems ) {
editor.addMenuItem( commandName, {
label: lang,
command: commandName,
group: 'clipboard',
order: ctxMenuOrder
} );
}
}
}
function addListeners() {
editor.on( 'key', onKey );
editor.on( 'contentDom', addPasteListenersToEditable );
// For improved performance, we're checking the readOnly state on selectionChange instead of hooking a key event for that.
editor.on( 'selectionChange', function( evt ) {
inReadOnly = evt.data.selection.getRanges()[ 0 ].checkReadOnly();
setToolbarStates();
} );
// If the "contextmenu" plugin is loaded, register the listeners.
if ( editor.contextMenu ) {
editor.contextMenu.addListener( function( element, selection ) {
inReadOnly = selection.getRanges()[ 0 ].checkReadOnly();
return {
cut: stateFromNamedCommand( 'cut' ),
copy: stateFromNamedCommand( 'copy' ),
paste: stateFromNamedCommand( 'paste' )
};
} );
// Adds 'touchend' integration with context menu paste item (#1347).
var pasteListener = null;
editor.on( 'menuShow', function() {
// Remove previous listener.
if ( pasteListener ) {
pasteListener.removeListener();
pasteListener = null;
}
// Attach new 'touchend' listeners to context menu paste items.
var item = editor.contextMenu.findItemByCommandName( 'paste' );
if ( item && item.element ) {
pasteListener = item.element.on( 'touchend', function() {
editor._.forcePasteDialog = true;
} );
}
} );
}
// Detect if any of paste buttons was touched. In such case we assume that user is using
// touch device and force displaying paste dialog (#595).
if ( editor.ui.addButton ) {
// Waiting for editor instance to be ready seems to be the most reliable way to
// be sure that paste buttons are already created.
editor.once( 'instanceReady', function() {
if ( !editor._.pasteButtons ) {
return;
}
CKEDITOR.tools.array.forEach( editor._.pasteButtons, function( name ) {
var pasteButton = editor.ui.get( name );
// Check if button was not removed by `removeButtons` config.
if ( pasteButton ) {
var buttonElement = CKEDITOR.document.getById( pasteButton._.id );
if ( buttonElement ) {
buttonElement.on( 'touchend', function() {
editor._.forcePasteDialog = true;
} );
}
}
} );
} );
}
}
// Add events listeners to editable.
function addPasteListenersToEditable() {
var editable = editor.editable();
if ( CKEDITOR.plugins.clipboard.isCustomCopyCutSupported ) {
var initOnCopyCut = function( evt ) {
// There shouldn't be anything to copy/cut when selection is collapsed (#869).
if ( editor.getSelection().isCollapsed() ) {
return;
}
// If user tries to cut in read-only editor, we must prevent default action (https://dev.ckeditor.com/ticket/13872).
if ( !editor.readOnly || evt.name != 'cut' ) {
clipboard.initPasteDataTransfer( evt, editor );
}
evt.data.preventDefault();
};
editable.on( 'copy', initOnCopyCut );
editable.on( 'cut', initOnCopyCut );
// Delete content with the low priority so one can overwrite cut data.
editable.on( 'cut', function() {
// If user tries to cut in read-only editor, we must prevent default action. (https://dev.ckeditor.com/ticket/13872)
if ( !editor.readOnly ) {
editor.extractSelectedHtml();
}
}, null, null, 999 );
}
// We'll be catching all pasted content in one line, regardless of whether
// it's introduced by a document command execution (e.g. toolbar buttons) or
// user paste behaviors (e.g. CTRL+V).
editable.on( clipboard.mainPasteEvent, function( evt ) {
if ( clipboard.mainPasteEvent == 'beforepaste' && preventBeforePasteEvent ) {
return;
}
// If you've just asked yourself why preventPasteEventNow() is not here, but
// in listener for CTRL+V and exec method of 'paste' command
// you've asked the same question we did.
//
// THE ANSWER:
//
// First thing to notice - this answer makes sense only for IE,
// because other browsers don't listen for 'paste' event.
//
// What would happen if we move preventPasteEventNow() here?
// For:
// * CTRL+V - IE fires 'beforepaste', so we prevent 'paste' and pasteDataFromClipboard(). OK.
// * editor.execCommand( 'paste' ) - we fire 'beforepaste', so we prevent
// 'paste' and pasteDataFromClipboard() and doc.execCommand( 'Paste' ). OK.
// * native context menu - IE fires 'beforepaste', so we prevent 'paste', but unfortunately
// on IE we fail with pasteDataFromClipboard() here, because of... we don't know why, but
// we just fail, so... we paste nothing. FAIL.
// * native menu bar - the same as for native context menu.
//
// But don't you know any way to distinguish first two cases from last two?
// Only one - special flag set in CTRL+V handler and exec method of 'paste'
// command. And that's what we did using preventPasteEventNow().
pasteDataFromClipboard( evt );
} );
// It's not possible to clearly handle all four paste methods (ctrl+v, native menu bar
// native context menu, editor's command) in one 'paste/beforepaste' event in IE.
//
// For ctrl+v & editor's command it's easy to handle pasting in 'beforepaste' listener,
// so we do this. For another two methods it's better to use 'paste' event.
//
// 'paste' is always being fired after 'beforepaste' (except of weird one on opening native
// context menu), so for two methods handled in 'beforepaste' we're canceling 'paste'
// using preventPasteEvent state.
//
// 'paste' event in IE is being fired before getClipboardDataByPastebin executes its callback.
//
// QUESTION: Why didn't you handle all 4 paste methods in handler for 'paste'?
// Wouldn't this just be simpler?
// ANSWER: Then we would have to evt.data.preventDefault() only for native
// context menu and menu bar pastes. The same with execIECommand().
// That would force us to mark CTRL+V and editor's paste command with
// special flag, other than preventPasteEvent. But we still would have to
// have preventPasteEvent for the second event fired by execIECommand.
// Code would be longer and not cleaner.
if ( clipboard.mainPasteEvent == 'beforepaste' ) {
editable.on( 'paste', function( evt ) {
if ( preventPasteEvent ) {
return;
}
// Cancel next 'paste' event fired by execIECommand( 'paste' )
// at the end of this callback.
preventPasteEventNow();
// Prevent native paste.
evt.data.preventDefault();
pasteDataFromClipboard( evt );
// Force IE to paste content into pastebin so pasteDataFromClipboard will work.
execIECommand( 'paste' );
} );
// If mainPasteEvent is 'beforePaste' (IE before Edge),
// dismiss the (wrong) 'beforepaste' event fired on context/toolbar menu open. (https://dev.ckeditor.com/ticket/7953)
editable.on( 'contextmenu', preventBeforePasteEventNow, null, null, 0 );
editable.on( 'beforepaste', function( evt ) {
// Do not prevent event on CTRL+V and SHIFT+INS because it blocks paste (https://dev.ckeditor.com/ticket/11970).
if ( evt.data && !evt.data.$.ctrlKey && !evt.data.$.shiftKey )
preventBeforePasteEventNow();
}, null, null, 0 );
}
editable.on( 'beforecut', function() {
!preventBeforePasteEvent && fixCut( editor );
} );
var mouseupTimeout;
// Use editor.document instead of editable in non-IEs for observing mouseup
// since editable won't fire the event if selection process started within
// iframe and ended out of the editor (https://dev.ckeditor.com/ticket/9851).
editable.attachListener( CKEDITOR.env.ie ? editable : editor.document.getDocumentElement(), 'mouseup', function() {
mouseupTimeout = setTimeout( function() {
setToolbarStates();
}, 0 );
} );
// Make sure that deferred mouseup callback isn't executed after editor instance
// had been destroyed. This may happen when editor.destroy() is called in parallel
// with mouseup event (i.e. a button with onclick callback) (https://dev.ckeditor.com/ticket/10219).
editor.on( 'destroy', function() {
clearTimeout( mouseupTimeout );
} );
editable.on( 'keyup', setToolbarStates );
}
// Create object representing Cut or Copy commands.
function createCutCopyCmd( type ) {
return {
type: type,
canUndo: type == 'cut', // We can't undo copy to clipboard.
startDisabled: true,
fakeKeystroke: type == 'cut' ? CKEDITOR.CTRL + 88 /*X*/ : CKEDITOR.CTRL + 67 /*C*/,
exec: function() {
// Attempts to execute the Cut and Copy operations.
function tryToCutCopy( type ) {
if ( CKEDITOR.env.ie )
return execIECommand( type );
// non-IEs part
try {
// Other browsers throw an error if the command is disabled.
return editor.document.$.execCommand( type, false, null );
} catch ( e ) {
return false;
}
}
this.type == 'cut' && fixCut();
var success = tryToCutCopy( this.type );
if ( !success ) {
// Show cutError or copyError.
editor.showNotification( editor.lang.clipboard[ this.type + 'Error' ] ); // jshint ignore:line
}
return success;
}
};
}
function createPasteCmd() {
return {
// Snapshots are done manually by editable.insertXXX methods.
canUndo: false,
async: true,
fakeKeystroke: CKEDITOR.CTRL + 86 /*V*/,
/**
* The default implementation of the paste command.
*
* @private
* @param {CKEDITOR.editor} editor An instance of the editor where the command is being executed.
* @param {Object/String} data If `data` is a string, then it is considered content that is being pasted.
* Otherwise it is treated as an object with options.
* @param {Boolean/String} [data.notification=true] Content for a notification shown after an unsuccessful
* paste attempt. If `false`, the notification will not be displayed. This parameter was added in 4.7.0.
* @param {String} [data.type='html'] The type of pasted content. There are two allowed values:
* * 'html'
* * 'text'
* @param {String/Object} data.dataValue Content being pasted. If this parameter is an object, it
* is supposed to be a `data` property of the {@link CKEDITOR.editor#paste} event.
* @param {CKEDITOR.plugins.clipboard.dataTransfer} data.dataTransfer Data transfer instance connected
* with the current paste action.
* @member CKEDITOR.editor.commands.paste
*/
exec: function( editor, data ) {
data = typeof data !== 'undefined' && data !== null ? data : {};
var cmd = this,
notification = typeof data.notification !== 'undefined' ? data.notification : true,
forcedType = data.type,
keystroke = CKEDITOR.tools.keystrokeToString( editor.lang.common.keyboard,
editor.getCommandKeystroke( this ) ),
msg = typeof notification === 'string' ? notification : editor.lang.clipboard.pasteNotification
.replace( /%1/, '<kbd aria-label="' + keystroke.aria + '">' + keystroke.display + '</kbd>' ),
pastedContent = typeof data === 'string' ? data : data.dataValue;
function callback( data, withBeforePaste ) {
withBeforePaste = typeof withBeforePaste !== 'undefined' ? withBeforePaste : true;
if ( data ) {
data.method = 'paste';
if ( !data.dataTransfer ) {
data.dataTransfer = clipboard.initPasteDataTransfer();
}
firePasteEvents( editor, data, withBeforePaste );
} else if ( notification && !editor._.forcePasteDialog ) {
editor.showNotification( msg, 'info', editor.config.clipboard_notificationDuration );
}
// Reset dialog mode (#595).
editor._.forcePasteDialog = false;
editor.fire( 'afterCommandExec', {
name: 'paste',
command: cmd,
returnValue: !!data
} );
}
// Force type for the next paste. Do not force if `config.forcePasteAsPlainText` set to true or 'allow-word' (#1013).
if ( forcedType && editor.config.forcePasteAsPlainText !== true && editor.config.forcePasteAsPlainText !== 'allow-word' ) {
editor._.nextPasteType = forcedType;
} else {
delete editor._.nextPasteType;
}
if ( typeof pastedContent === 'string' ) {
callback( {
dataValue: pastedContent
} );
} else {
editor.getClipboardData( callback );
}
}
};
}
function preventPasteEventNow() {
preventPasteEvent = 1;
// For safety reason we should wait longer than 0/1ms.
// We don't know how long execution of quite complex getClipboardData will take
// and in for example 'paste' listener execCommand() (which fires 'paste') is called
// after getClipboardData finishes.
// Luckily, it's impossible to immediately fire another 'paste' event we want to handle,
// because we only handle there native context menu and menu bar.
setTimeout( function() {
preventPasteEvent = 0;
}, 100 );
}
function preventBeforePasteEventNow() {
preventBeforePasteEvent = 1;
setTimeout( function() {
preventBeforePasteEvent = 0;
}, 10 );
}
// Tries to execute any of the paste, cut or copy commands in IE. Returns a
// boolean indicating that the operation succeeded.
// @param {String} command *LOWER CASED* name of command ('paste', 'cut', 'copy').
function execIECommand( command ) {
var doc = editor.document,
body = doc.getBody(),
enabled = false,
onExec = function() {
enabled = true;
};
// The following seems to be the only reliable way to detect that
// clipboard commands are enabled in IE. It will fire the
// onpaste/oncut/oncopy events only if the security settings allowed
// the command to execute.
body.on( command, onExec );
// IE7: document.execCommand has problem to paste into positioned element.
if ( CKEDITOR.env.version > 7 ) {
doc.$.execCommand( command );
} else {
doc.$.selection.createRange().execCommand( command );
}
body.removeListener( command, onExec );
return enabled;
}
// Cutting off control type element in IE standards breaks the selection entirely. (https://dev.ckeditor.com/ticket/4881)
function fixCut() {
if ( !CKEDITOR.env.ie || CKEDITOR.env.quirks )
return;
var sel = editor.getSelection(),
control, range, dummy;
if ( ( sel.getType() == CKEDITOR.SELECTION_ELEMENT ) && ( control = sel.getSelectedElement() ) ) {
range = sel.getRanges()[ 0 ];
dummy = editor.document.createText( '' );
dummy.insertBefore( control );
range.setStartBefore( dummy );
range.setEndAfter( control );
sel.selectRanges( [ range ] );
// Clear up the fix if the paste wasn't succeeded.
setTimeout( function() {
// Element still online?
if ( control.getParent() ) {
dummy.remove();
sel.selectElement( control );
}
}, 0 );
}
}
// Allow to peek clipboard content by redirecting the
// pasting content into a temporary bin and grab the content of it.
function getClipboardDataByPastebin( evt, callback ) {
var doc = editor.document,
editable = editor.editable(),
cancel = function( evt ) {
evt.cancel();
},
blurListener;
// Avoid recursions on 'paste' event or consequent paste too fast. (https://dev.ckeditor.com/ticket/5730)
if ( doc.getById( 'cke_pastebin' ) )
return;
var sel = editor.getSelection();
var bms = sel.createBookmarks();
// https://dev.ckeditor.com/ticket/11384. On IE9+ we use native selectionchange (i.e. editor#selectionCheck) to cache the most
// recent selection which we then lock on editable blur. See selection.js for more info.
// selectionchange fired before getClipboardDataByPastebin() cached selection
// before creating bookmark (cached selection will be invalid, because bookmarks modified the DOM),
// so we need to fire selectionchange one more time, to store current seleciton.
// Selection will be locked when we focus pastebin.
if ( CKEDITOR.env.ie )
sel.root.fire( 'selectionchange' );
// Create container to paste into.
// For rich content we prefer to use "body" since it holds
// the least possibility to be splitted by pasted content, while this may
// breaks the text selection on a frame-less editable, "div" would be
// the best one in that case.
// In another case on old IEs moving the selection into a "body" paste bin causes error panic.
// Body can't be also used for Opera which fills it with <br>
// what is indistinguishable from pasted <br> (copying <br> in Opera isn't possible,
// but it can be copied from other browser).
var pastebin = new CKEDITOR.dom.element(
( CKEDITOR.env.webkit || editable.is( 'body' ) ) && !CKEDITOR.env.ie ? 'body' : 'div', doc );
pastebin.setAttributes( {
id: 'cke_pastebin',
'data-cke-temp': '1'
} );
var containerOffset = 0,
offsetParent,
win = doc.getWindow();
if ( CKEDITOR.env.webkit ) {
// It's better to paste close to the real paste destination, so inherited styles
// (which Webkits will try to compensate by styling span) differs less from the destination's one.
editable.append( pastebin );
// Style pastebin like .cke_editable, to minimize differences between origin and destination. (https://dev.ckeditor.com/ticket/9754)
pastebin.addClass( 'cke_editable' );