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wysiwyg-e.js
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wysiwyg-e.js
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import { PolymerElement, html } from '@polymer/polymer/polymer-element.js';
import '@webcomponents/shadycss/entrypoints/apply-shim.js';
import '@polymer/font-roboto/roboto.js';
import '@polymer/iron-a11y-keys/iron-a11y-keys.js';
import '@polymer/iron-flex-layout/iron-flex-layout.js';
import '@polymer/iron-flex-layout/iron-flex-layout-classes.js';
import '@polymer/iron-icon/iron-icon.js';
import '@polymer/iron-iconset-svg/iron-iconset-svg.js';
import '@polymer/iron-media-query/iron-media-query.js';
import '@polymer/paper-button/paper-button.js';
import '@polymer/paper-tooltip/paper-tooltip.js';
import { WysiwygTool } from './wysiwyg-tool.js';
import { WysiwygLocalize } from './wysiwyg-localize.js';
if (document) {
var iconset = document.createElement('iron-iconset-svg');
iconset.setAttribute('size', 24);
iconset.setAttribute('name', 'wysiwyg');
iconset.innerHTML = `
<svg>
<defs>
<g id="scroll-down">
<path d="M7.41 7.84L12 12.42l4.59-4.58L18 9.25l-6 6-6-6z"></path>
</g>
<g id="scroll-left">
<path d="M15.41 16.09l-4.58-4.59 4.58-4.59L14 5.5l-6 6 6 6z"></path>
</g>
<g id="scroll-right">
<path d="M8.59 16.34l4.58-4.59-4.58-4.59L10 5.75l6 6-6 6z"></path>
</g>
<g id="scroll-up">
<path d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path>
</g>
<g id="undo">
<path d="M12.5 8c-2.65 0-5.05.99-6.9 2.6L2 7v9h9l-3.62-3.62c1.39-1.16 3.16-1.88 5.12-1.88 3.54 0 6.55 2.31 7.6 5.5l2.37-.78C21.08 11.03 17.15 8 12.5 8z"></path>
</g>
<g id="redo">
<path d="M18.4 10.6C16.55 8.99 14.15 8 11.5 8c-4.65 0-8.58 3.03-9.96 7.22L3.9 16c1.05-3.19 4.05-5.5 7.6-5.5 1.95 0 3.73.72 5.12 1.88L13 16h9V7l-3.6 3.6z"></path>
</g>
</defs>
</svg>
`;
document.body.appendChild(iconset);
}
export class WysiwygE extends PolymerElement {
static get _targetTemplate() {
return html`
<div id="editable" contenteditable placeholder$="[[placeholder]]" show-placeholder$="[[showPlaceholder]]"></div>
`;
}
static get template() {
return html`
<style include="iron-flex iron-flex-alignment iron-flex-factors iron-positioning">
:host {
display: block;
position: relative;
overflow-y: hidden;
font-family: var(--wysiwyg-font, Roboto);
}
#toolbar {
background: var(--wysiwyg-toolbar-background, #2A9AF2);
user-select: none;
color: var(--wysiwyg-toolbar-color, white);
@apply --wysiwyg-toolbar;
}
#toolbarLayout {
overflow: hidden;
}
#editable {
padding: 20px;
outline: none;
@apply --wysiwyg-editable;
@apply --layout-flex;
}
#editable[show-placeholder]:before {
content: attr(placeholder);
display: block;
position: absolute;
opacity: 0.5;
@apply --wysiwyg-editable-placeholder;
}
#editable > :first-child {
margin-top: 0;
@apply --wysiwyg-editable-first-child;
}
#editable > :last-child {
margin-bottom: 0;
@apply --wysiwyg-editable-last-child;
}
#editable ::selection {
color: white;
background: #2A9AF2;
@apply --wysiwyg-editable-selection;
}
#editable ol {
padding-left: 30px;
@apply --wysiwyg-editable-ol;
}
#editable ul {
padding-left: 30px;
@apply --wysiwyg-editable-ul;
}
#editable li {
@apply --wysiwyg-editable-li;
}
#editable a {
color: #2A9AF2;
@apply --wysiwyg-editable-a;
}
#editable img {
@apply --wysiwyg-editable-img;
}
#editable blockquote[blockquote] {
padding: 15px;
margin: 0;
border-left: 5px solid #eee;
@apply --wysiwyg-editable-blockquote;
}
#editable blockquote:not([blockquote]) {
padding: 0;
margin: 0 0 0 20px;
@apply --wysiwyg-editable-indent;
}
#editable code {
display: block;
padding: 10px;
margin: 10px 0;
line-height: 1.5;
background-color: #f7f7f7;
border-radius: 3px;
white-space: pre-wrap;
font-family: monospace;
@apply --wysiwyg-editable-code;
}
#editable p:first-child {
margin-top: 0;
}
#editable p {
@apply --wysiwyg-editable-p;
}
#editable h1 {
@apply --wysiwyg-editable-h1;
}
#editable h2{
@apply --wysiwyg-editable-h2;
}
#editable h3 {
@apply --wysiwyg-editable-h3;
}
#editable h4 {
@apply --wysiwyg-editable-h4;
}
#editable h5 {
@apply --wysiwyg-editable-h5;
}
#editable h6 {
@apply --wysiwyg-editable-h6;
}
#editable b {
@apply --wysiwyg-editable-b;
}
#editable u {
@apply --wysiwyg-editable-u;
}
#editable i {
@apply --wysiwyg-editable-i;
}
#editable strike {
@apply --wysiwyg-editable-strike;
}
#editable audio-wrapper,
#editable video-wrapper {
display: block;
}
#editable audio,
#editable video {
pointer-events: none;
}
#editable table {
border-spacing: 0;
border-collapse: collapse;
}
#editable table,
#editable th,
#editable td {
border: 1px solid black;
}
#editable th,
#editable td {
padding: 5px 10px;
}
#editable thead,
#editable tfoot {
font-weight: bold;
background: #ccc;
text-align: center;
}
#editable tbody tr:nth-child(even) {
background: #f5f5f5;
}
paper-button {
padding: 0;
margin: 0;
height: 40px;
line-height: 40px;
border-radius: 0px;
min-width: 40px;
min-height: 40px;
background: transparent;
text-transform: none;
}
paper-button[disabled] {
color: rgba(255, 255, 255, 0.5);
}
@media (min-width: 768px) {
#layout {
@apply --layout-vertical;
}
#toolbar {
@apply --layout-horizontal;
}
#toolbarLayout {
height: 40px;
@apply --layout-horizontal;
@apply --layout-flex;
flex-wrap: nowrap;
}
#layout[force-narrow] {
@apply --layout-horizontal;
}
#layout[force-narrow] #toolbar {
@apply --layout-vertical;
}
#layout[force-narrow] #toolbarLayout {
height: auto;
@apply --layout-vertical;
width: 40px;
max-height: calc(100% - 80px);
}
}
@media (max-width: 767.9px) {
#layout {
@apply --layout-horizontal;
}
#toolbar {
@apply --layout-vertical;
}
#toolbarLayout {
@apply --layout-vertical;
width: 40px;
max-height: calc(100% - 80px);
}
}
#content {
overflow-y: auto;
@apply --layout-flex;
@apply --layout-vertical;
}
</style>
<iron-a11y-keys target="[[target]]" keys="[[modifier.key]]+z" on-keys-pressed="undo"></iron-a11y-keys>
<iron-a11y-keys target="[[target]]" keys="[[modifier.key]]+y" on-keys-pressed="redo"></iron-a11y-keys>
<iron-media-query query="(min-width: 768px)" query-matches="{{minWidth768px}}"></iron-media-query>
<div class="fit" id="layout" force-narrow$="[[forceNarrow]]">
<div id="toolbar" on-tap="updateTools">
<paper-button id="scrollPrevious" on-up="_onScrollButtonUp" on-down="_onScrollPrevious" disabled="[[!canScrollPrevious]]">
<iron-icon icon="[[_scrollPreviousIcon(minWidth768px, forceNarrow)]]"></iron-icon>
</paper-button>
<div id="toolbarLayout" scroll-top="[[scrollTop]]" scroll-left="[[scrollLeft]]">
<slot id="tools"></slot>
<paper-button id="undo" on-tap="undo" disabled="[[!canUndo]]" hidden="[[noUndo]]">
<iron-icon icon="wysiwyg:undo"></iron-icon>
</paper-button>
<paper-tooltip for="undo" position="[[tooltipPosition]]" offset="5">
<wysiwyg-localize language="[[language]]" resources="[[resources]]" string-key="Undo"></wysiwyg-localize>
<span> ([[modifier.tooltip]] + Z)</span>
</paper-tooltip>
<paper-button id="redo" on-tap="redo" disabled="[[!canRedo]]" hidden="[[noRedo]]">
<iron-icon icon="wysiwyg:redo"></iron-icon>
</paper-button>
<paper-tooltip for="redo" position="[[tooltipPosition]]" offset="5">
<wysiwyg-localize language="[[language]]" resources="[[resources]]" string-key="Redo"></wysiwyg-localize>
<span> ([[modifier.tooltip]] + Y)</span>
</paper-tooltip>
</div>
<paper-button id="scrollNext" on-up="_onScrollButtonUp" on-down="_onScrollNext" disabled="[[!canScrollNext]]">
<iron-icon icon="[[_scrollNextIcon(minWidth768px, forceNarrow)]]"></iron-icon>
</paper-button>
</div>
<div id="content">
${this._targetTemplate}
</div>
</div>
`;
}
static get observers() {
return [
'updateTools(range0, canRedo, canUndo, value, commonAncestorPath, minWidth768px, tooltipPosition, forceNarrow, language, debug, modifier)'
];
}
static get properties() {
return {
//
// Current position within the states stack
//
activeState: {
type: Number,
value: 0,
notify: true,
observer: '_activeStateChanged'
},
//
// Array of style types allowed by the sanitize method
//
allowedStyleTypes: {
type: Array,
value: function () {
return [
'text-align',
'color'
];
}
},
//
// Array of tagNames allowed by editor for its sanitize method
//
allowedTagNames: {
type: Array,
value: function () {
return [
'BR',
'P',
'SPAN'
];
}
},
//
// The anchorNode of the current selection
//
anchorNode: {
type: Object,
readOnly: true,
notify: true
},
//
// The anchorOffset of the current selection
//
anchorOffset: {
type: Number,
readOnly: true,
notify: true
},
//
// The baseNode of the current selection
//
baseNode: {
type: Object,
readOnly: true,
notify: true
},
//
// The baseOffset of the current selection
//
baseOffset: {
type: Number,
readOnly: true,
notify: true
},
//
// Whether a redo action is available
//
canRedo: {
type: Boolean,
value: false,
computed: '_computeCanRedo(activeState, states)',
notify: true
},
//
// If true, tools can scroll up. Computed.
//
canScrollPrevious: {
type: Boolean,
computed: '_computeCanScrollPrevious(minWidth768px, forceNarrow, scrollHeight, scrollTop, scrollWidth, scrollLeft)'
},
//
// If true, tools can scroll down. Computed.
//
canScrollNext: {
type: Boolean,
computed: '_computeCanScrollNext(minWidth768px, forceNarrow, scrollHeight, scrollTop, scrollWidth, scrollLeft)'
},
//
// Whether an undo action is available
//
canUndo: {
type: Boolean,
value: false,
computed: '_computeCanUndo(activeState, states)',
notify: true
},
//
// If true, console.log debug messages.
//
debug: {
type: Boolean,
value: false
},
//
// Built from range0.commonAncestorContainer
//
commonAncestorPath: {
type: Array,
value: null,
readOnly: true,
notify: true
},
//
// The extentNode of the current selection
//
extentNode: {
type: Object,
readOnly: true,
notify: true
},
//
// The extentOffset of the current selection
//
extentOffset: {
type: Number,
readOnly: true,
notify: true
},
//
// The focusNode of the current selection
//
focusNode: {
type: Object,
readOnly: true,
notify: true
},
//
// The focusOffset of the current selection
//
focusOffset: {
type: Number,
readOnly: true,
notify: true
},
//
// If true, force narrow view with vertical toolbar. Defaults to false.
//
forceNarrow: {
type: Boolean,
value: false
},
//
// The isCollapsed of the current selection
//
isCollapsed: {
type: Boolean,
readOnly: true,
notify: true
},
//
// Two-letter language code for use with Polymer.AppLocalizeBehavior. Defaults to 'en'.
//
language: {
type: String,
value: 'en'
},
//
// Tracks viewport with. Managed by iron-media-query
//
minWidth768px: {
type: Boolean,
observer: '_minWidth768pxChanged'
},
//
// Modifier for keyboard shortcuts: Cmd key for Macs, Ctrl key for all others
//
modifier: {
type: Object,
value: function () {
var isMac = navigator.platform.indexOf('Mac') >= 0;
return {
key: isMac ? 'meta' : 'ctrl',
tooltip: isMac ? '⌘' : 'Ctrl'
};
}
},
//
// A MutationObserver to update the selection as well as sanitize changes and add them to the states array
//
mutationObserver: {
type: Object,
value: function () {
var sanitizeQueue = [], sanitizing = false;
this.sanitizeQueue = sanitizeQueue;
var sanitize = function () {
sanitizing = true;
var mutations = sanitizeQueue.shift();
var sanitized = this.sanitize(mutations);
if (sanitizeQueue.length) {
sanitize();
} else {
sanitizing = false;
if (sanitized) {
var html = this.target.innerHTML || '';
if (this.states.length > 1) this.states.splice(this.activeState + 1, this.states.length);
var state = {
html: html
};
if (state.html !== this.states[this.activeState].html) {
this.states.push(state);
this.activeState = this.states.length - 1;
this.value = html;
this._setText(this.target ? this.target.textContent : '');
}
}
}
return sanitized;
}.bind(this);
return new MutationObserver(
function (mutations) {
sanitizeQueue.push(mutations);
if (!sanitizing) sanitize();
setTimeout(this.updateSelection.bind(this), 10);
}.bind(this)
);
},
readOnly: true,
observer: '_mutationObserverChanged'
},
//
// Hide the redo button and prevent redo operations
//
noRedo: {
type: Boolean,
value: false
},
//
// Hide the undo button and prevent undo operations
//
noUndo: {
type: Boolean,
value: false
},
//
// Text to show when target's trimmed textContent is blank
//
placeholder: {
type: String,
value: 'Edit your content here...'
},
//
// The getRangeAt(0) of the current selection
//
range0: {
type: Object,
readOnly: true,
notify: true
},
//
// The rangeCount of the current selection
//
rangeCount: {
type: Number,
readOnly: true,
notify: true
},
//
// Key-value pairs of tags that should be replaced by other tags
//
replacementTagNames: {
type: Object,
value: function () {
return {
'DIV': 'P'
};
}
},
//
// Contains localized versions of text for use with Polymer.AppLocalizeBehavior.
//
resources: {
type: Object,
value: function () {
return {
'br': {
'Undo': 'Desfazer',
'Redo': 'Refazer'
},
'en': {
'Undo': 'Undo',
'Redo': 'Redo'
},
'fr': {
'Undo': 'Annuler',
'Redo': 'Rétablir'
},
'de': {
'Undo': 'Rückgängig',
'Redo': 'Wiederholen'
}
};
}
},
//
// Delay for scheduling of scroll jobs for the tool container. Defaults to 1.
//
scrollDelay: {
type: Number,
value: 1
},
//
// Amount in pixels by which to scroll the tool container up or down. Defaults to 10.
//
scrollStep: {
type: Number,
value: 10
},
//
// Height of tool scroll container. Read-only.
//
scrollHeight: {
type: Number,
value: 0,
readOnly: true
},
//
// Left offset of tool scroll container. Read-only.
//
scrollLeft: {
type: Number,
value: 0,
readOnly: true
},
//
// Top offset of tool scroll container. Read-only.
//
scrollTop: {
type: Number,
value: 0,
readOnly: true
},
//
// Width of tool scroll container. Read-only.
//
scrollWidth: {
type: Number,
value: 0,
readOnly: true
},
//
// Whether placeholder should be shown. Computed.
//
showPlaceholder: {
type: Boolean,
computed: '_computeShowPlaceholder(value)',
value: true
},
//
// An array containing the undo / redo history of the value property
//
states: {
type: Array,
value: function () {
return [
{
html: '<p><br></p>',
selection: null
}
];
},
notify: true
},
//
// The target to manage
//
target: {
type: Object,
observer: '_targetChanged',
notify: true
},
//
// The textContent of the target node
//
text: {
type: String,
readOnly: true,
notify: true
},
//
// Computed based on ``minWidth768px``
//
tooltipPosition: {
type: String,
computed: '_computeTooltipPosition(minWidth768px, forceNarrow)'
},
//
// The type of the current selection
//
type: {
type: String,
readOnly: true,
notify: true
},
//
// The current innerHTML of the target node
//
value: {
type: String,
observer: '_valueChanged',
notify: true
}
};
}
connectedCallback() {
super.connectedCallback();
this.observe();
if (!this._selectionChangeHandler) {
this._selectionChangeHandler = function (event) {
setTimeout(this.updateSelection.bind(this), 10);
}.bind(this);
}
document.addEventListener('selectionchange', this._selectionChangeHandler);
if (!this._resizeHandler) {
this._resizeHandler = function () {
this._setScrollHeight(Math.max(0, this.$.toolbarLayout.scrollHeight - this.$.toolbarLayout.offsetHeight));
this._setScrollWidth(Math.max(0, this.$.toolbarLayout.scrollWidth - this.$.toolbarLayout.offsetWidth));
}.bind(this);
}
window.addEventListener('resize', this._resizeHandler);
if (!this._keydownHandler) {
this._keydownHandler = function (event) {
//Prevent default tab behavior
if (event.key === 'Tab') this._tab(event);
//Prevent default delete behavior
if (event.key === 'Delete') this._delete(event);
//Prevent default backspace behavior
if (event.key === 'Backspace') this._backspace(event);
//Allow input without alt, ctrl, or meta
if (!event.altKey && !event.ctrlKey && !event.metaKey) return;
//Allow select all, refresh, print, paste, copy, cut
if (!event.altKey && !event.shiftKey && ['a', 'r', 'p', 'v', 'c', 'x'].indexOf(event.key) >= 0 && (event.ctrlKey || event.metaKey)) return;
event.preventDefault();
}.bind(this);
}
this.$.content.addEventListener('keydown', this._keydownHandler);
if (!this._restoreSelectionHandler) {
this._restoreSelectionHandler = function () {
this.restoreSelection();
}.bind(this);
}
this.$.toolbar.addEventListener('restore-selection', this._restoreSelectionHandler);
if (!this._selectElementHandler) {
this._selectElementHandler = function (event) {
this.selectElement(event.detail.element);
}.bind(this);
}
this.addEventListener('select-element', this._selectElementHandler);
if (!this._pasteHandler) {
this._pasteHandler = function (event) {
event.preventDefault();
var data = event.clipboardData.getData('text/html');
// If paste does not contain HTML, fall back to plain text
if (!data.length) data = event.clipboardData.getData('text');
document.execCommand('insertHTML', false, data);
}.bind(this);
}
this.addEventListener('paste', this._pasteHandler);
if (!this._slotchangeHandler) {
this._slotchangeHandler = function () {
this.updateTools();
}.bind(this);
}
this.$.tools.addEventListener('slotchange', this._slotchangeHandler);
}
disconnectedCallback() {
super.disconnectedCallback();
this.disconnect();
document.removeEventListener('selectionchange', this._selectionChangeHandler);
window.removeEventListener('resize', this._resizeHandler);
this.$.content.removeEventListener('keydown', this._keydownHandler);
this.removeEventListener('restore-selection', this._restoreSelectionHandler);
this.removeEventListener('select-element', this._selectElementHandler);
this.removeEventListener('paste', this._pasteHandler);
this.$.tools.removeEventListener('slotchange', this._slotchangeHandler);
}
ready() {
super.ready();
this.target = this.$.editable;
if (!this.value) this.value = '<p><br></p>';
this.sanitize();
setTimeout(
function () {
this.updateTools();
}.bind(this),
100
);
}
//
// Stop MutationObserver
//
disconnect() {
if (typeof super.disconnect === 'function') super.disconnect();
if (this.mutationObserver) this.mutationObserver.disconnect();
}
//
// Get the current selection
//
getSelection() {
if (typeof super.getSelection === 'function') super.getSelection();
var parent = this.target;
while (parent) {
if ([9, 11].indexOf(parent.nodeType) >= 0 && parent.getSelection) return parent.getSelection();
parent = parent.parentNode || parent.host;
}
}
//
// Start MutationObserver
//
observe() {
if (typeof super.observe === 'function') super.observe();
if (this.mutationObserver && this.target) {
this.mutationObserver.observe(
this.target,
{
childList: true,
attributes: true,
characterData: true,
subtree: true
}
);
}
}
//
// Revert an undo operation
//
redo() {
if (this.noRedo) return;
if (typeof super.redo === 'function') super.redo();
if (!this.states.length || this.activeState >= this.states.length - 1) return false;
this.disconnect();
this.activeState += 1;
setTimeout(
function () {
this.observe();
}.bind(this),
10
);
}
//
// Restore selection state
//
restoreSelection() {
if (this.debug) console.log('Restoring selection!');
var charIndex = 0, range = this.target.ownerDocument.createRange(), target = this.target, savedSel = this.states[this.activeState].selection;
if (!savedSel) return;
var startNodeOffset, endNodeOffset;
startNodeOffset = this._getNodeAndOffsetAt(target, savedSel.start);
endNodeOffset = this._getNodeAndOffsetAt(target, savedSel.end);
range.setStart(startNodeOffset.node, startNodeOffset.offset);
range.setEnd(endNodeOffset.node, endNodeOffset.offset);
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);
}
//
// Sanitize DOM changes
//
sanitize(mutations) {
if (!mutations) return true;
var sanitized = true, nodes = [], i, j, k, p, pre;
for (i = 0; i < mutations.length; i += 1) {
var mutation = mutations[i];
if (nodes.indexOf(mutation.target) === -1) {
nodes.push(mutation.target);
if (mutation.target.querySelectorAll) {
var subnodes = mutation.target.querySelectorAll('*');
for (k = 0; k < subnodes.length; k += 1) {
if (nodes.indexOf(subnodes[k]) === -1) nodes.push(subnodes[k]);
}
}
}
for (j = 0; j < mutation.addedNodes.length; j += 1) {
var addedNode = mutation.addedNodes[j];
if (nodes.indexOf(addedNode) === -1) {
nodes.push(addedNode);
if (addedNode.querySelectorAll) {
var subnodes = addedNode.querySelectorAll('*');
for (k = 0; k < subnodes.length; k += 1) {
if (nodes.indexOf(subnodes[k]) === -1) nodes.push(subnodes[k]);
}
}
}
}
}
var tools = this.$.tools.assignedNodes ? this.$.tools.assignedNodes({flatten: true}) : [];
tools = tools.filter(
function (tool) {
return tool.nodeType === Node.ELEMENT_NODE;
}
);
var allowedStyleTypes = this.allowedStyleTypes;
for (j = 0; j < tools.length; j += 1) {
allowedStyleTypes = allowedStyleTypes.concat(tools[j].allowedStyleTypes);
}