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|
/* -*- js-indent-level: 8 -*- */
/*
* L.Clipboard is used to abstract our storage and management of
* local & remote clipboard data.
*/
/* global _ vex brandProductName */
// Get all interesting clipboard related events here, and handle
// download logic in one place ...
// We keep track of the current selection content if it is simple
// So we can do synchronous copy/paste in the callback if possible.
L.Clipboard = L.Class.extend({
initialize: function(map) {
this._map = map;
this._selectionContent = '';
this._selectionType = null;
this._accessKey = [ '', '' ];
this._clipboardSerial = 0; // incremented on each operation
this._failedTimer = null;
this._dummyDivName = 'copy-paste-container';
var div = document.createElement('div');
this._dummyDiv = div;
div.setAttribute('id', this._dummyDivName);
div.setAttribute('style', 'user-select: text !important');
div.style.opacity = '0';
div.setAttribute('contenteditable', 'true');
div.setAttribute('type', 'text');
div.setAttribute('style', 'position: fixed; left: 0px; top: -200px; width: 15000px; height: 200px; ' +
'overflow: hidden; z-index: -1000, -webkit-user-select: text !important; display: block; ' +
'font-size: 6pt">');
// so we get events to where we want them.
var parent = document.getElementById('map');
parent.appendChild(div);
// sensible default content.
this._resetDiv();
var that = this;
var beforeSelect = function(ev) { return that._beforeSelect(ev); }
if (window.isInternetExplorer)
{
document.addEventListener('cut', function(ev) { return that.cut(ev); });
document.addEventListener('copy', function(ev) { return that.copy(ev); });
document.addEventListener('paste', function(ev) { return that.paste(ev); });
document.addEventListener('beforecut', beforeSelect);
document.addEventListener('beforecopy', beforeSelect);
document.addEventListener('beforepaste', function(ev) { return that._beforePasteIE(ev); });
}
else
{
document.oncut = function(ev) { return that.cut(ev); };
document.oncopy = function(ev) { return that.copy(ev); };
document.onpaste = function(ev) { return that.paste(ev); };
document.onbeforecut = beforeSelect;
document.onbeforecopy = beforeSelect;
document.onbeforepaste = beforeSelect;
}
},
compatRemoveNode: function(node) {
if (window.isInternetExplorer)
node.removeNode(true);
else // standard
node.parentNode.removeChild(node);
},
// We can do a much better job when we fetch text/plain too.
stripHTML: function(html) {
var tmp = document.createElement('div');
tmp.innerHTML = html;
// attempt to cleanup unwanted elements
var styles = tmp.querySelectorAll('style');
for (var i = 0; i < styles.length; i++) {
this.compatRemoveNode(styles[i]);
}
return tmp.textContent.trim() || tmp.innerText.trim() || '';
},
setKey: function(key) {
if (this._accessKey[0] === key)
return;
this._accessKey[1] = this._accessKey[0];
this._accessKey[0] = key;
},
getMetaBase: function() {
return this._map.options.webserver + this._map.options.serviceRoot;
},
getMetaPath: function(idx) {
if (!idx)
idx = 0;
return '/lool/clipboard?WOPISrc=' + encodeURIComponent(this._map.options.doc) +
'&ServerId=' + this._map._socket.WSDServer.Id +
'&ViewId=' + this._map._docLayer._viewId +
'&Tag=' + this._accessKey[idx];
},
// Returns the marker used to identify stub messages.
_getHtmlStubMarker: function() {
return '<title>Stub HTML Message</title>';
},
// Returns true if the argument is a stub html.
_isStubHtml: function(text) {
return text.indexOf(this._getHtmlStubMarker()) > 0;
},
// wrap some content with our stub magic
_originWrapBody: function(body, isStub) {
var encodedOrigin = encodeURIComponent(this.getMetaPath());
var text = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">\n' +
'<html>\n' +
' <head>\n';
if (isStub)
text += ' ' + this._getHtmlStubMarker() + '\n';
text += ' <meta http-equiv="content-type" content="text/html; charset=utf-8"/>\n' +
' <meta name="origin" content="' + encodedOrigin + '"/>\n' +
' </head>\n'
+ body +
'</html>';
return text;
},
// what an empty clipboard has on it
_getStubHtml: function() {
var lang = 'en_US'; // FIXME: l10n
return this._substProductName(this._originWrapBody(
' <body lang="' + lang + '" dir="ltr">\n' +
' <p>' + _('To paste outside %productName, please first click the \'download\' button') + '</p>\n' +
' </body>\n', true
));
},
_getMetaOrigin: function (html) {
var match = '<meta name="origin" content="';
var start = html.indexOf(match);
if (start < 0) {
return '';
}
var end = html.indexOf('"', start + match.length);
if (end < 0) {
return '';
}
var meta = html.substring(start + match.length, end);
// quick sanity checks that it one of ours.
if (meta.indexOf('%2Fclipboard%3FWOPISrc%3D') >= 0 &&
meta.indexOf('%26ServerId%3D') > 0 &&
meta.indexOf('%26ViewId%3D') > 0 &&
meta.indexOf('%26Tag%3D') > 0)
return decodeURIComponent(meta);
else
console.log('Mis-understood foreign origin: "' + meta + '"');
return '';
},
_encodeHtmlToBlob: function(text) {
var content = [];
var data = new Blob([text]);
content.push('text/html\n');
content.push(data.size.toString(16) + '\n');
content.push(data);
content.push('\n');
return new Blob(content);
},
_readContentSyncToBlob: function(dataTransfer) {
var content = [];
var types = dataTransfer.types;
for (var t = 0; t < types.length; ++t) {
if (types[t] === 'Files')
continue; // images handled elsewhere.
var data = new Blob([dataTransfer.getData(types[t])]);
console.log('type ' + types[t] + ' length ' + data.size +
' -> 0x' + data.size.toString(16) + '\n');
content.push((types[t] === 'text' ? 'text/plain' : types[t]) + '\n');
content.push(data.size.toString(16) + '\n');
content.push(data);
content.push('\n');
}
if (content.length > 0)
return new Blob(content, {type : 'application/octet-stream', endings: 'transparent'});
else
return null;
},
// Abstract async post & download for our progress wrappers
// type: GET or POST
// url: where to get / send the data
// optionalFormData: used for POST for form data
// completeFn: called on completion - with response.
// progressFn: allows splitting the progress bar up.
_doAsyncDownload: function(type,url,optionalFormData,completeFn,progressFn,onErrorFn) {
try {
var that = this;
var request = new XMLHttpRequest();
// avoid to invoke the following code if the download widget depends on user interaction
if (!that._downloadProgress || !that._downloadProgress.isVisible()) {
that._startProgress();
that._downloadProgress.startProgressMode();
}
request.onload = function() {
that._downloadProgress._onComplete();
if (type === 'POST') {
that._downloadProgress._onClose();
}
// For some reason 400 error from the server doesn't
// invoke onerror callback, but we do get here with
// size==0, which signifies no response from the server.
// So we check the status code instead.
if (this.status == 200) {
completeFn(this.response);
} else if (onErrorFn) {
onErrorFn(this.response);
}
};
request.onerror = function() {
if (onErrorFn)
onErrorFn();
that._downloadProgress._onComplete();
that._downloadProgress._onClose();
};
request.upload.addEventListener('progress', function (e) {
if (e.lengthComputable) {
var percent = progressFn(e.loaded / e.total * 100);
var progress = { statusType: 'setvalue', value: percent };
that._downloadProgress._onUpdateProgress(progress);
}
}, false);
request.open(type, url, true /* isAsync */);
request.timeout = 20 * 1000; // 20 secs ...
request.responseType = 'blob';
if (optionalFormData !== null)
request.send(optionalFormData);
else
request.send();
} catch (error) {
if (onErrorFn)
onErrorFn();
}
},
// Suck the data from one server to another asynchronously ...
_dataTransferDownloadAndPasteAsync: function(src, dest, fallbackHtml) {
var that = this;
// FIXME: add a timestamp in the links (?) ignroe old / un-responsive servers (?)
that._doAsyncDownload(
'GET', src, null,
function(response) {
console.log('download done - response ' + response);
var formData = new FormData();
formData.append('data', response, 'clipboard');
that._doAsyncDownload(
'POST', dest, formData,
function() {
console.log('up-load done, now paste');
that._map._socket.sendMessage('uno .uno:Paste')
},
function(progress) { return 50 + progress/2; }
);
},
function(progress) { return progress/2; },
function() {
console.log('failed to download clipboard using fallback html');
// If it's the stub, avoid pasting.
if (that._isStubHtml(fallbackHtml))
{
// Let the user know they haven't really copied document content.
vex.dialog.alert({
message: _('Failed to download clipboard, please re-copy'),
callback: function () {
that._map.focus();
}
});
return;
}
var formData = new FormData();
formData.append('data', new Blob([fallbackHtml]), 'clipboard');
that._doAsyncDownload(
'POST', dest, formData,
function() {
console.log('up-load of fallback done, now paste');
that._map._socket.sendMessage('uno .uno:Paste')
},
function(progress) { return 50 + progress/2; },
function() {
that.dataTransferToDocumentFallback(null, fallbackHtml);
}
);
}
);
},
_onFileLoadFunc: function(file) {
var socket = this._map._socket;
return function(e) {
var blob = new Blob(['paste mimetype=' + file.type + '\n', e.target.result]);
socket.sendMessage(blob);
};
},
_asyncReadPasteImage: function(file) {
if (file.type.match(/image.*/)) {
var reader = new FileReader();
reader.onload = this._onFileLoadFunc(file);
reader.readAsArrayBuffer(file);
return true;
}
return false;
},
dataTransferToDocument: function (dataTransfer, preferInternal, htmlText, usePasteKeyEvent) {
// Look for our HTML meta magic.
// cf. ClientSession.cpp /textselectioncontent:/
var meta = this._getMetaOrigin(htmlText);
var id = this.getMetaPath(0);
var idOld = this.getMetaPath(1);
// for the paste, we always prefer the internal LOK's copy/paste
if (preferInternal === true &&
(meta.indexOf(id) >= 0 || meta.indexOf(idOld) >= 0))
{
// Home from home: short-circuit internally.
console.log('short-circuit, internal paste');
this._map._socket.sendMessage('uno .uno:Paste');
return;
}
// Do we have a remote Online we can suck rich data from ?
if (meta !== '')
{
console.log('Transfer between servers\n\t"' + meta + '" vs. \n\t"' + id + '"');
var destination = this.getMetaBase() + this.getMetaPath();
this._dataTransferDownloadAndPasteAsync(meta, destination, htmlText);
return;
}
// Fallback.
this.dataTransferToDocumentFallback(dataTransfer, htmlText, usePasteKeyEvent);
},
dataTransferToDocumentFallback: function(dataTransfer, htmlText, usePasteKeyEvent) {
var content;
if (dataTransfer) {
// Suck HTML content out of dataTransfer now while it feels like working.
content = this._readContentSyncToBlob(dataTransfer);
}
// Fallback on the html.
if (!content && htmlText != '') {
content = this._encodeHtmlToBlob(htmlText);
}
// FIXME: do we want this section ?
// Images get a look in only if we have no content and are async
if (content == null && htmlText === '' && dataTransfer != null)
{
var types = dataTransfer.types;
console.log('Attempting to paste image(s)');
// first try to transfer images
// TODO if we have both Files and a normal mimetype, should we handle
// both, or prefer one or the other?
for (var t = 0; t < types.length; ++t) {
console.log('\ttype' + types[t]);
if (types[t] === 'Files') {
var files = dataTransfer.files;
if (files !== null)
{
for (var f = 0; f < files.length; ++f)
this._asyncReadPasteImage(files[f])
}
else // IE / Edge
this._asyncReadPasteImage(dataTransfer.items[t].getAsFile());
}
}
return;
}
if (content != null) {
console.log('Normal HTML, so smart paste not possible');
var formData = new FormData();
formData.append('file', content);
var that = this;
var destination = this.getMetaBase() + this.getMetaPath();
this._doAsyncDownload('POST', destination, formData,
function() {
console.log('Posted ' + content.size + ' bytes successfully');
if (usePasteKeyEvent) {
// paste into dialog
var KEY_PASTE = 1299;
that._map._textInput._sendKeyEvent(0, KEY_PASTE);
} else {
// paste into document
that._map._socket.sendMessage('uno .uno:Paste');
}
},
function(progress) { return progress; }
);
} else {
console.log('Nothing we can paste on the clipboard');
}
},
_checkSelection: function() {
var checkSelect = document.getSelection();
if (checkSelect && checkSelect.isCollapsed)
console.log('Error: collapsed selection - cannot copy/paste');
},
_getHtmlForClipboard: function() {
var text;
if (this._selectionType === 'complex' ||
this._map._docLayer.hasGraphicSelection()) {
console.log('Copy/Cut with complex/graphical selection');
if (this._selectionType === 'text' && this._selectionContent !== '')
{ // back here again having downloaded it ...
text = this._selectionContent;
console.log('Use downloaded selection.');
}
else
{
console.log('Downloaded that selection.');
text = this._getStubHtml();
this._onDownloadOnLargeCopyPaste();
this._downloadProgress.setURI( // richer, bigger HTML ...
this.getMetaBase() + this.getMetaPath() + '&MimeType=text/html');
}
} else if (this._selectionType === null) {
console.log('Copy/Cut with no selection!');
text = this._getStubHtml();
} else {
console.log('Copy/Cut with simple text selection');
text = this._selectionContent;
}
return text;
},
// returns whether we shold stop processing the event
populateClipboard: function(ev) {
this._checkSelection();
if (window.isInternetExplorer)
{
var that = this;
setTimeout(function() { that._resetDiv(); }, 0);
this._clipboardSerial++; // we have no way of knowing of course.
// We let the browser copy from our div.
return false;
}
var text = this._getHtmlForClipboard();
// this._stopHideDownload(); - this confuses the borwser ruins copy/cut on iOS
var plainText = this.stripHTML(text);
if (ev.clipboardData) { // Standard
// if copied content is graphical then plainText is null and it does not work on mobile.
ev.clipboardData.setData('text/plain', plainText ? plainText: ' ');
ev.clipboardData.setData('text/html', text);
console.log('Put "' + text + '" on the clipboard');
this._clipboardSerial++;
}
return true; // prevent default
},
// only used by IE.
_beforePasteIE: function(ev) {
console.log('IE11 work ...');
this._beforeSelect(ev);
this._dummyDiv.focus();
// Now wait for the paste ...
},
// Does the selection of text before an event comes in
_beforeSelect: function(ev) {
console.log('Got event ' + ev.type + ' setting up selection');
this._beforeSelectImpl(ev.type);
},
_beforeSelectImpl: function(operation) {
if (window.isInternetExplorer && operation != 'paste')
// We need populate our content into the div for
// the brower to copy.
this._dummyDiv.innerHTML = this._getHtmlForClipboard();
else
// We need some spaces in there ...
this._resetDiv();
var sel = document.getSelection();
if (!sel)
return;
var selected = false;
var selectRange;
if (window.isInternetExplorer && operation != 'paste')
{
this._dummyDiv.focus();
if (document.body.createTextRange) // Internet Explorer
{
console.log('Legacy IE11 selection');
selectRange = document.body.createTextRange();
selectRange.moveToElementText(this._dummyDiv);
selectRange.select();
selected = true;
}
}
if (!selected)
{
sel.removeAllRanges();
selectRange = document.createRange();
selectRange.selectNodeContents(this._dummyDiv);
sel.addRange(selectRange);
var checkSelect = document.getSelection();
if (checkSelect.isCollapsed)
console.log('Error: failed to select - cannot copy/paste');
}
return false;
},
_resetDiv: function() {
// cleanup the content:
this._dummyDiv.innerHTML =
'<b style="font-weight:normal; background-color: transparent; color: transparent;"><span> </span></b>';
},
// Try-harder fallbacks for emitting cut/copy/paste events.
_execOnElement: function(operation) {
var serial = this._clipboardSerial;
this._resetDiv();
var success = false;
var active = null;
// selection can change focus.
active = document.activeElement;
success = (document.execCommand(operation) &&
serial !== this._clipboardSerial);
// try to restore focus if we need to.
if (active !== null && active !== document.activeElement)
active.focus();
console.log('fallback ' + operation + ' ' + (success?'success':'fail'));
return success;
},
// Encourage browser(s) to actually execute the command
_execCopyCutPaste: function(operation) {
var serial = this._clipboardSerial;
// try a direct execCommand.
if (window.isInternetExplorer && operation != 'paste')
this._beforeSelectImpl(operation);
if (document.execCommand(operation) &&
serial !== this._clipboardSerial) {
console.log('copied successfully');
return;
}
// try a hidden div
if (this._execOnElement(operation)) {
console.log('copied on element successfully');
return;
}
// see if we have help for paste
if (operation === 'paste')
{
try {
console.warn('Asked parent for a paste event');
this._map.fire('postMessage', {msgId: 'UI_Paste'});
} catch (error) {
console.warn('Failed to post-message: ' + error);
}
}
// wait and see if we get some help
var that = this;
clearTimeout(this._failedTimer);
setTimeout(function() {
if (that._clipboardSerial !== serial)
{
console.log('successful ' + operation);
if (operation === 'paste')
that._stopHideDownload();
}
else
{
console.log('help did not arive for ' + operation);
that._warnCopyPaste();
}
}, 150 /* ms */)
},
// Pull UNO clipboard commands out from menus and normal user input.
// We try to massage and re-emit these, to get good security event / credentials.
filterExecCopyPaste: function(cmd) {
if (cmd === '.uno:Copy') {
this._execCopyCutPaste('copy');
} else if (cmd === '.uno:Cut') {
this._execCopyCutPaste('cut');
} else if (cmd === '.uno:Paste') {
this._execCopyCutPaste('paste');
} else {
return false;
}
console.log('filtered uno command ' + cmd);
return true;
},
_doCopyCut: function(ev, unoName) {
console.log(unoName);
var preventDefault = this.populateClipboard(ev);
this._map._socket.sendMessage('uno .uno:' + unoName);
if (preventDefault) {
ev.preventDefault();
return false;
}
},
cut: function(ev) { return this._doCopyCut(ev, 'Cut'); },
copy: function(ev) { return this._doCopyCut(ev, 'Copy'); },
paste: function(ev) {
console.log('Paste');
if (this._map._activeDialog)
ev.usePasteKeyEvent = true;
var that = this;
if (window.isInternetExplorer)
{
var active = document.activeElement;
// Can't get HTML until it is pasted ... so quick timeout
setTimeout(function() {
that.dataTransferToDocument(null, /* preferInternal = */ true, that._dummyDiv.innerHTML);
// attempt to restore focus.
if (active == null)
that._map.focus();
else
active.focus();
that._map._textInput._abortComposition(ev);
that._clipboardSerial++;
}, 0 /* ASAP */);
return false;
}
if (ev.clipboardData) { // Standard
ev.preventDefault();
var usePasteKeyEvent = ev.usePasteKeyEvent;
// Always capture the html content separate as we may lose it when we
// pass the clipboard data to a different context (async calls, f.e.).
var htmlText = ev.clipboardData.getData('text/html');
this.dataTransferToDocument(ev.clipboardData, /* preferInternal = */ true, htmlText, usePasteKeyEvent);
this._map._textInput._abortComposition(ev);
this._clipboardSerial++;
this._stopHideDownload();
}
return false;
},
clearSelection: function() {
this._selectionContent = '';
this._selectionType = null;
// If no other copy/paste things occurred then ...
var that = this;
var serial = this._clipboardSerial;
if (!this._hideDownloadTimer)
this._hideDownloadTimer = setTimeout(function() {
that._hideDownloadTimer = null;
if (serial == that._clipboardSerial)
that._stopHideDownload();
}, 1000 * 15);
},
// textselectioncontent: message
setTextSelectionHTML: function(html) {
this._selectionType = 'text';
this._selectionContent = html;
},
// sets the selection to some (cell formula) text)
setTextSelectionText: function(text) {
this._selectionType = 'text';
this._selectionContent = this._originWrapBody(
'<body>' + text + '</body>');
},
// complexselection: message
onComplexSelection: function (/*text*/) {
// Mark this selection as complex.
this._selectionType = 'complex';
},
_startProgress: function() {
if (!this._downloadProgress) {
this._downloadProgress = L.control.downloadProgress();
}
if (!this._downloadProgress.isVisible()) {
this._downloadProgress.addTo(this._map);
}
this._downloadProgress.show();
},
_onDownloadOnLargeCopyPaste: function () {
if (!this._downloadProgress || this._downloadProgress.isClosed()) {
this._warnFirstLargeCopyPaste();
this._startProgress();
}
else if (this._downloadProgress.isStarted()) {
// Need to show this only when a download is really in progress and we block it.
// Otherwise, it's easier to flash the widget or something.
this._warnLargeCopyPasteAlreadyStarted();
}
},
// useful if we did an internal paste already and don't want that.
_stopHideDownload: function() {
clearTimeout(this._hideDownloadTimer);
this._hideDownloadTimer = null;
if (!this._downloadProgress ||
!this._downloadProgress.isVisible() ||
this._downloadProgress.isClosed())
return;
this._downloadProgress._onClose();
},
_userAlreadyWarned: function (warning) {
var itemKey = warning;
if (!localStorage.getItem(itemKey)) {
localStorage.setItem(itemKey, '1');
return false;
}
return true;
},
_warnCopyPaste: function() {
var self = this;
var msg;
if (L.Browser.mobile) {
msg = _('<p>Please use the copy/paste buttons on your on-screen keyboard.</p>');
} else {
msg = _('<p>Your browser has very limited access to the clipboard, so use these keyboard shortcuts:<ul><li><b>Ctrl+C</b>: For copying.</li><li><b>Ctrl+X</b>: For cutting.</li><li><b>Ctrl+V</b>: For pasting.</li></ul></p>');
if (navigator.appVersion.indexOf('Mac') != -1 || navigator.userAgent.indexOf('Mac') != -1) {
msg = msg.replace(/Ctrl/g, '⌘');
}
}
vex.dialog.alert({
unsafeMessage: msg,
callback: function () {
self._map.focus();
}
});
},
_substProductName: function (msg) {
var productName = (typeof brandProductName !== 'undefined') ? brandProductName : 'LibreOffice Online';
return msg.replace('%productName', productName);
},
_warnFirstLargeCopyPaste: function () {
if (this._userAlreadyWarned('warnedAboutLargeCopy'))
return;
var self = this;
var msg = _('<p>If you would like to share larger elements of your document with other applications ' +
'it is necessary to first download them onto your device. To do that press the ' +
'"Start download" button below, and when complete click "Confirm copy to clipboard".</p>' +
'<p>If you are copy and pasting between documents inside %productName, ' +
'there is no need to download.</p>');
vex.dialog.alert({
unsafeMessage: this._substProductName(msg),
callback: function () {
self._map.focus();
}
});
},
_warnLargeCopyPasteAlreadyStarted: function () {
var self = this;
vex.dialog.alert({
unsafeMessage: _('<p>A download due to a large copy/paste operation has already started. ' +
'Please, wait for the current download or cancel it before starting a new one</p>'),
callback: function () {
self._map.focus();
}
});
},
});
L.clipboard = function(map) {
return new L.Clipboard(map);
};
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