/* http://github.com/mindmup/bootstrap-wysiwyg */
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/*global jQuery, $, FileReader*/
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/*jslint browser:true*/
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(function ($) {
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'use strict';
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var readFileIntoDataUrl = function (fileInfo) {
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var loader = $.Deferred(),
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fReader = new FileReader();
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fReader.onload = function (e) {
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loader.resolve(e.target.result);
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};
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fReader.onerror = loader.reject;
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fReader.onprogress = loader.notify;
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fReader.readAsDataURL(fileInfo);
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return loader.promise();
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};
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$.fn.cleanHtml = function () {
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var html = $(this).html();
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return html && html.replace(/(<br>|\s|<div><br><\/div>| )*$/, '');
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};
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$.fn.wysiwyg = function (userOptions) {
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var editor = this,
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selectedRange,
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options,
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toolbarBtnSelector,
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updateToolbar = function () {
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if (options.activeToolbarClass) {
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$(options.toolbarSelector).find(toolbarBtnSelector).each(function () {
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try {
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var command = $(this).data(options.commandRole);
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if (document.queryCommandState(command)) {
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$(this).addClass(options.activeToolbarClass);
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} else {
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$(this).removeClass(options.activeToolbarClass);
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}
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} catch(e){}
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});
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}
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},
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execCommand = function (commandWithArgs, valueArg) {
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var commandArr = commandWithArgs.split(' '),
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command = commandArr.shift(),
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args = commandArr.join(' ') + (valueArg || '');
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document.execCommand(command, 0, args);
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updateToolbar();
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},
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bindHotkeys = function (hotKeys) {
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$.each(hotKeys, function (hotkey, command) {
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editor.keydown(hotkey, function (e) {
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if (editor.attr('contenteditable') && editor.is(':visible')) {
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e.preventDefault();
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e.stopPropagation();
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execCommand(command);
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}
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}).keyup(hotkey, function (e) {
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if (editor.attr('contenteditable') && editor.is(':visible')) {
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e.preventDefault();
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e.stopPropagation();
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}
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});
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});
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},
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getCurrentRange = function () {
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try {
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var sel = window.getSelection();
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if (sel.getRangeAt && sel.rangeCount) {
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return sel.getRangeAt(0);
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}
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} catch(e){}
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},
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saveSelection = function () {
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selectedRange = getCurrentRange();
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},
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restoreSelection = function () {
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try {
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var selection = window.getSelection();
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if (selectedRange) {
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try {
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selection.removeAllRanges();
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} catch (ex) {
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document.body.createTextRange().select();
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document.selection.empty();
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}
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selection.addRange(selectedRange);
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}
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} catch(e){}
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},
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insertFiles = function (files) {
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editor.focus();
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$.each(files, function (idx, fileInfo) {
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if (/^image\//.test(fileInfo.type)) {
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$.when(readFileIntoDataUrl(fileInfo)).done(function (dataUrl) {
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execCommand('insertimage', dataUrl);
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}).fail(function (e) {
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options.fileUploadError("file-reader", e);
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});
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} else {
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options.fileUploadError("unsupported-file-type", fileInfo.type);
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}
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});
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},
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markSelection = function (input, color) {
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restoreSelection();
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if (document.queryCommandSupported('hiliteColor')) {
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document.execCommand('hiliteColor', 0, color || 'transparent');
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}
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saveSelection();
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input.data(options.selectionMarker, color);
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},
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bindToolbar = function (toolbar, options) {
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toolbar.find(toolbarBtnSelector).click(function () {
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restoreSelection();
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editor.focus();
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execCommand($(this).data(options.commandRole));
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saveSelection();
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});
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toolbar.find('[data-toggle=dropdown]').click(restoreSelection);
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//ACE
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//ie 9-11
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var is_ie = !!window.navigator.msPointerEnabled || (!!document.all && !!document.addEventListener);
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toolbar.find('input[type=text][data-' + options.commandRole + ']').on('webkitspeechchange change', function () {
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var newValue = this.value; /* ugly but prevents fake double-calls due to selection restoration */
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this.value = '';
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restoreSelection();
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if (newValue) {
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editor.focus();
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execCommand($(this).data(options.commandRole), newValue);
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}
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saveSelection();
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}).on('focus', function () {
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//if IE return, not needed
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if(is_ie) return;//ACE
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var input = $(this);
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if (!input.data(options.selectionMarker)) {
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markSelection(input, options.selectionColor);
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input.focus();
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}
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}).on('blur', function () {
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//if IE return, not needed
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if(is_ie) return;//ACE
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var input = $(this);
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if (input.data(options.selectionMarker)) {
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markSelection(input, false);
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}
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});
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toolbar.find('input[type=file][data-' + options.commandRole + ']').change(function () {
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restoreSelection();
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if (this.type === 'file' && this.files && this.files.length > 0) {
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insertFiles(this.files);
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}
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saveSelection();
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this.value = '';
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});
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},
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initFileDrops = function () {
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editor.on('dragenter dragover', false)
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.on('drop', function (e) {
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var dataTransfer = e.originalEvent.dataTransfer;
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e.stopPropagation();
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e.preventDefault();
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if (dataTransfer && dataTransfer.files && dataTransfer.files.length > 0) {
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insertFiles(dataTransfer.files);
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}
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});
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};
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options = $.extend({}, $.fn.wysiwyg.defaults, userOptions);
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toolbarBtnSelector = 'a[data-' + options.commandRole + '],button[data-' + options.commandRole + '],input[type=button][data-' + options.commandRole + ']';
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bindHotkeys(options.hotKeys);
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if (options.dragAndDropImages) {
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initFileDrops();
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}
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bindToolbar($(options.toolbarSelector), options);
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editor.attr('contenteditable', true)
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.on('mouseup keyup mouseout', function () {
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saveSelection();
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updateToolbar();
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});
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$(window).bind('touchend', function (e) {
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var isInside = (editor.is(e.target) || editor.has(e.target).length > 0),
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currentRange = getCurrentRange(),
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clear = currentRange && (currentRange.startContainer === currentRange.endContainer && currentRange.startOffset === currentRange.endOffset);
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if (!clear || isInside) {
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saveSelection();
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updateToolbar();
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}
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});
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return this;
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};
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$.fn.wysiwyg.defaults = {
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hotKeys: {
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'ctrl+b meta+b': 'bold',
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'ctrl+i meta+i': 'italic',
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'ctrl+u meta+u': 'underline',
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'ctrl+z meta+z': 'undo',
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'ctrl+y meta+y meta+shift+z': 'redo',
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'ctrl+l meta+l': 'justifyleft',
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'ctrl+r meta+r': 'justifyright',
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'ctrl+e meta+e': 'justifycenter',
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'ctrl+j meta+j': 'justifyfull',
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'shift+tab': 'outdent',
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'tab': 'indent'
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},
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toolbarSelector: '[data-role=editor-toolbar]',
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commandRole: 'edit',
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activeToolbarClass: 'btn-info',
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selectionMarker: 'edit-focus-marker',
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selectionColor: 'darkgrey',
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dragAndDropImages: true,
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fileUploadError: function (reason, detail) { console.log("File upload error", reason, detail); }
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};
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}(window.jQuery));
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