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blockSelection.ts
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365 lines (306 loc) · 8.87 KB
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/**
* @class BlockSelection
* @classdesc Manages Block selection with shortcut CMD+A
*
* @module BlockSelection
* @version 1.0.0
*/
import Module from '../__module';
import Block from '../block';
import * as _ from '../utils';
import $ from '../dom';
import SelectionUtils from '../selection';
export default class BlockSelection extends Module {
/**
* Sanitizer Config
* @return {SanitizerConfig}
*/
private get sanitizerConfig() {
return {
p: {},
h1: {},
h2: {},
h3: {},
h4: {},
h5: {},
h6: {},
ol: {},
ul: {},
li: {},
br: true,
img: {
src: true,
width: true,
height: true,
},
a: {
href: true,
},
b: {},
i: {},
u: {},
};
}
/**
* Flag that identifies all Blocks selection
* @return {boolean}
*/
public get allBlocksSelected(): boolean {
const {BlockManager} = this.Editor;
return BlockManager.blocks.every((block) => block.selected === true);
}
/**
* Set selected all blocks
* @param {boolean} state
*/
public set allBlocksSelected(state: boolean) {
const {BlockManager} = this.Editor;
BlockManager.blocks.forEach((block) => block.selected = state);
}
/**
* Flag that identifies any Block selection
* @return {boolean}
*/
public get anyBlockSelected(): boolean {
const {BlockManager} = this.Editor;
return BlockManager.blocks.some((block) => block.selected === true);
}
/**
* Return selected Blocks array
* @return {Block[]}
*/
public get selectedBlocks(): Block[] {
return this.Editor.BlockManager.blocks.filter((block: Block) => block.selected);
}
/**
* Flag used to define block selection
* First CMD+A defines it as true and then second CMD+A selects all Blocks
* @type {boolean}
*/
private needToSelectAll: boolean = false;
/**
* Flag used to define native input selection
* In this case we allow double CMD+A to select Block
* @type {boolean}
*/
private nativeInputSelected: boolean = false;
/**
* Flag identifies any input selection
* That means we can select whole Block
* @type {boolean}
*/
private readyToBlockSelection: boolean = false;
/**
* SelectionUtils instance
* @type {SelectionUtils}
*/
private selection: SelectionUtils;
/**
* Module Preparation
* Registers Shortcuts CMD+A and CMD+C
* to select all and copy them
*/
public prepare(): void {
const {Shortcuts} = this.Editor;
/** Selection shortcut */
Shortcuts.add({
name: 'CMD+A',
handler: (event) => {
const {BlockManager} = this.Editor;
/**
* When one page consist of two or more EditorJS instances
* Shortcut module tries to handle all events. Thats why Editor's selection works inside the target Editor, but
* for others error occurs because nothing to select.
*
* Prevent such actions if focus is not inside the Editor
*/
if (!BlockManager.currentBlock) {
return;
}
this.handleCommandA(event);
},
});
this.selection = new SelectionUtils();
}
/**
* Remove selection of Block
* @param {number?} index - Block index according to the BlockManager's indexes
*/
public unSelectBlockByIndex(index?) {
const {BlockManager} = this.Editor;
let block;
if (isNaN(index)) {
block = BlockManager.currentBlock;
} else {
block = BlockManager.getBlockByIndex(index);
}
block.selected = false;
}
/**
* Clear selection from Blocks
*
* @param {Event} reason - event caused clear of selection
* @param {boolean} restoreSelection - if true, restore saved selection
*/
public clearSelection(reason?: Event, restoreSelection = false) {
const {BlockManager, Caret, RectangleSelection} = this.Editor;
this.needToSelectAll = false;
this.nativeInputSelected = false;
this.readyToBlockSelection = false;
/**
* If reason caused clear of the selection was printable key and any block is selected,
* remove selected blocks and insert pressed key
*/
if (this.anyBlockSelected && reason && reason instanceof KeyboardEvent && _.isPrintableKey(reason.keyCode)) {
const indexToInsert = BlockManager.removeSelectedBlocks();
BlockManager.insertInitialBlockAtIndex(indexToInsert, true);
Caret.setToBlock(BlockManager.currentBlock);
_.delay(() => {
Caret.insertContentAtCaretPosition(reason.key);
}, 20)();
}
this.Editor.CrossBlockSelection.clear(reason);
if (!this.anyBlockSelected || RectangleSelection.isRectActivated()) {
this.Editor.RectangleSelection.clearSelection();
return;
}
/**
* Restore selection when Block is already selected
* but someone tries to write something.
*/
if (restoreSelection) {
this.selection.restore();
}
/** Now all blocks cleared */
this.allBlocksSelected = false;
}
/**
* Reduce each Block and copy its content
*
* @param {ClipboardEvent} e - copy/cut event
*
* @return Promise<void>
*/
public async copySelectedBlocks(e: ClipboardEvent): Promise<void> {
/**
* Prevent default copy
*/
e.preventDefault();
const fakeClipboard = $.make('div');
this.selectedBlocks.forEach((block) => {
/**
* Make <p> tag that holds clean HTML
*/
const cleanHTML = this.Editor.Sanitizer.clean(block.holder.innerHTML, this.sanitizerConfig);
const fragment = $.make('p');
fragment.innerHTML = cleanHTML;
fakeClipboard.appendChild(fragment);
});
const savedData = await Promise.all(this.selectedBlocks.map((block) => block.save()));
const textPlain = Array.from(fakeClipboard.childNodes).map((node) => node.textContent).join('\n\n');
const textHTML = fakeClipboard.innerHTML;
e.clipboardData.setData('text/plain', textPlain);
e.clipboardData.setData('text/html', textHTML);
e.clipboardData.setData(this.Editor.Paste.MIME_TYPE, JSON.stringify(savedData));
}
/**
* select Block
* @param {number?} index - Block index according to the BlockManager's indexes
*/
public selectBlockByIndex(index?) {
const {BlockManager} = this.Editor;
/**
* Remove previous focused Block's state
*/
BlockManager.clearFocused();
let block;
if (isNaN(index)) {
block = BlockManager.currentBlock;
} else {
block = BlockManager.getBlockByIndex(index);
}
/** Save selection */
this.selection.save();
SelectionUtils.get()
.removeAllRanges();
block.selected = true;
/** close InlineToolbar when we selected any Block */
this.Editor.InlineToolbar.close();
}
/**
* First CMD+A selects all input content by native behaviour,
* next CMD+A keypress selects all blocks
*
* @param {KeyboardEvent} event
*/
private handleCommandA(event: KeyboardEvent): void {
this.Editor.RectangleSelection.clearSelection();
/** allow default selection on native inputs */
if ($.isNativeInput(event.target) && !this.readyToBlockSelection) {
this.readyToBlockSelection = true;
return;
}
const workingBlock = this.Editor.BlockManager.getBlock(event.target as HTMLElement);
const inputs = workingBlock.inputs;
/**
* If Block has more than one editable element allow native selection
* Second cmd+a will select whole Block
*/
if (inputs.length > 1 && !this.readyToBlockSelection) {
this.readyToBlockSelection = true;
return;
}
if (inputs.length === 1 && !this.needToSelectAll) {
this.needToSelectAll = true;
return;
}
if (this.needToSelectAll) {
/**
* Prevent default selection
*/
event.preventDefault();
this.selectAllBlocks();
/**
* Disable any selection after all Blocks selected
*/
this.needToSelectAll = false;
this.readyToBlockSelection = false;
/**
* Close ConversionToolbar when all Blocks selected
*/
this.Editor.ConversionToolbar.close();
} else if (this.readyToBlockSelection) {
/**
* prevent default selection when we use custom selection
*/
event.preventDefault();
/**
* select working Block
*/
this.selectBlockByIndex();
/**
* Enable all Blocks selection if current Block is selected
*/
this.needToSelectAll = true;
}
}
/**
* Select All Blocks
* Each Block has selected setter that makes Block copyable
*/
private selectAllBlocks() {
/**
* Save selection
* Will be restored when closeSelection fired
*/
this.selection.save();
/**
* Remove Ranges from Selection
*/
SelectionUtils.get()
.removeAllRanges();
this.allBlocksSelected = true;
/** close InlineToolbar if we selected all Blocks */
this.Editor.InlineToolbar.close();
}
}