/**
 * @description 字号 FontSize
 * @author lkw
 *
 */

import DropListMenu from '../menu-constructors/DropListMenu'
import $ from '../../utils/dom-core'
import Editor from '../../editor/index'
import { MenuActive } from '../menu-constructors/Menu'
import FontSizeList from './FontSizeList'

class FontSize extends DropListMenu implements MenuActive {
    constructor(editor: Editor) {
        const $elem = $(
            `<div class="w-e-menu" data-title="字号">
                <i class="w-e-icon-text-heigh"></i>
            </div>`
        )
        let fontStyleList = new FontSizeList(editor.config.fontSizes)
        const fontListConf = {
            width: 160,
            title: '设置字号',
            type: 'list',
            list: fontStyleList.getItemList(),
            clickHandler: (value: string) => {
                // this 是指向当前的 FontSize 对象
                this.command(value)
            },
        }
        super($elem, editor, fontListConf)
    }

    /**
     * 执行命令
     * @param value value
     */
    public command(value: string): void {
        const editor = this.editor
        const isEmptySelection = editor.selection.isSelectionEmpty()

        let selectionElem = editor.selection.getSelectionContainerElem()?.elems[0]

        if (selectionElem == null) return

        const isFont = selectionElem?.nodeName.toLowerCase() !== 'p'
        const isSameSize = selectionElem?.getAttribute('size') === value
        if (isEmptySelection) {
            if (isFont && !isSameSize) {
                const $elems = editor.selection.getSelectionRangeTopNodes()
                const focusElem = $elems[0].elems[0]
                editor.selection.createRangeByElem($elems[0])
                editor.selection.moveCursor(focusElem)
                selectionElem = focusElem
            }
            editor.selection.setRangeToElem(selectionElem)
            // 插入空白选区
            editor.selection.createEmptyRange()
        }
        editor.cmd.do('fontSize', value)
        if (isEmptySelection) {
            // 需要将选区范围折叠起来
            editor.selection.collapseRange()
            editor.selection.restoreSelection()
        }
    }

    /**
     * 尝试修改菜单激活状态
     * ?字号是否需要有激活状态这个操作?
     */
    public tryChangeActive(): void {}
}

export default FontSize