mirror of
https://github.com/wanglin2/mind-map.git
synced 2026-02-21 10:27:44 +08:00
301 lines
9.1 KiB
JavaScript
301 lines
9.1 KiB
JavaScript
import Base from './Base'
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import { walk, asyncRun } from '../utils'
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// 逻辑结构图
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class LogicalStructure extends Base {
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// 构造函数
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constructor(opt = {}) {
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super(opt)
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}
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// 布局
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doLayout(callback) {
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let task = [
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() => {
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this.computedBaseValue()
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},
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() => {
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this.computedTopValue()
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},
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() => {
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this.adjustTopValue()
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},
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() => {
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callback(this.root)
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}
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]
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asyncRun(task)
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}
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// 遍历数据计算节点的left、width、height
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computedBaseValue() {
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walk(
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this.renderer.renderTree,
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null,
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(cur, parent, isRoot, layerIndex) => {
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let newNode = this.createNode(cur, parent, isRoot, layerIndex)
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// 根节点定位在画布中心位置
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if (isRoot) {
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this.setNodeCenter(newNode)
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} else {
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// 非根节点
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// 定位到父节点右侧
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newNode.left =
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parent._node.left + parent._node.width + this.getMarginX(layerIndex)
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}
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if (!cur.data.expand) {
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return true
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}
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},
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(cur, parent, isRoot, layerIndex) => {
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// 返回时计算节点的areaHeight，也就是子节点所占的高度之和，包括外边距
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let len = cur.data.expand === false ? 0 : cur._node.children.length
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cur._node.childrenAreaHeight = len
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? cur._node.children.reduce((h, item) => {
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return h + item.height
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}, 0) +
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(len + 1) * this.getMarginY(layerIndex + 1)
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: 0
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// 如果存在概要，则和概要的高度取最大值
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let generalizationNodeHeight = cur._node.checkHasGeneralization()
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? cur._node._generalizationNodeHeight +
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this.getMarginY(layerIndex + 1)
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: 0
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cur._node.childrenAreaHeight2 = Math.max(
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cur._node.childrenAreaHeight,
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generalizationNodeHeight
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)
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},
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true,
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0
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)
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}
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// 遍历节点树计算节点的top
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computedTopValue() {
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walk(
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this.root,
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null,
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(node, parent, isRoot, layerIndex) => {
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if (
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node.nodeData.data.expand &&
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node.children &&
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node.children.length
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) {
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let marginY = this.getMarginY(layerIndex + 1)
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// 第一个子节点的top值 = 该节点中心的top值 - 子节点的高度之和的一半
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let top = node.top + node.height / 2 - node.childrenAreaHeight / 2
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let totalTop = top + marginY
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node.children.forEach(cur => {
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cur.top = totalTop
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totalTop += cur.height + marginY
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})
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}
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},
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null,
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true
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)
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}
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// 调整节点top
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adjustTopValue() {
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walk(
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this.root,
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null,
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(node, parent, isRoot, layerIndex) => {
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if (!node.nodeData.data.expand) {
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return
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}
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// 判断子节点所占的高度之和是否大于该节点自身，大于则需要调整位置
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let difference =
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node.childrenAreaHeight2 -
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this.getMarginY(layerIndex + 1) * 2 -
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node.height
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if (difference > 0) {
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this.updateBrothers(node, difference / 2)
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}
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},
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null,
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true
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)
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}
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// 更新兄弟节点的top
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updateBrothers(node, addHeight) {
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if (node.parent) {
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let childrenList = node.parent.children
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let index = childrenList.findIndex(item => {
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return item.uid === node.uid
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})
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childrenList.forEach((item, _index) => {
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if (item.uid === node.uid || item.hasCustomPosition()) {
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// 适配自定义位置
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return
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}
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let _offset = 0
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// 上面的节点往上移
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if (_index < index) {
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_offset = -addHeight
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} else if (_index > index) {
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// 下面的节点往下移
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_offset = addHeight
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}
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item.top += _offset
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// 同步更新子节点的位置
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if (item.children && item.children.length) {
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this.updateChildren(item.children, 'top', _offset)
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}
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})
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// 更新父节点的位置
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this.updateBrothers(node.parent, addHeight)
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}
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}
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// 绘制连线，连接该节点到其子节点
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renderLine(node, lines, style, lineStyle) {
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if (lineStyle === 'curve') {
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this.renderLineCurve(node, lines, style)
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} else if (lineStyle === 'direct') {
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this.renderLineDirect(node, lines, style)
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} else {
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this.renderLineStraight(node, lines, style)
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}
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}
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// 直线风格连线
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renderLineStraight(node, lines, style) {
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if (node.children.length <= 0) {
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return []
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}
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let { left, top, width, height, expandBtnSize } = node
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if (!this.mindMap.opt.alwaysShowExpandBtn) {
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expandBtnSize = 0
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}
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let marginX = this.getMarginX(node.layerIndex + 1)
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let s1 = (marginX - expandBtnSize) * 0.6
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let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
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node.children.forEach((item, index) => {
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let x1 =
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node.layerIndex === 0 ? left + width : left + width + expandBtnSize
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let y1 = top + height / 2
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let x2 = item.left
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let y2 = item.top + item.height / 2
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// 节点使用横线风格，需要额外渲染横线
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let nodeUseLineStyleOffset = nodeUseLineStyle ? item.width : 0
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y1 = nodeUseLineStyle && !node.isRoot ? y1 + height / 2 : y1
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y2 = nodeUseLineStyle ? y2 + item.height / 2 : y2
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let path = `M ${x1},${y1} L ${x1 + s1},${y1} L ${x1 + s1},${y2} L ${
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x2 + nodeUseLineStyleOffset
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},${y2}`
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lines[index].plot(path)
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style && style(lines[index], item)
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})
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}
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// 直连风格
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renderLineDirect(node, lines, style) {
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if (node.children.length <= 0) {
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return []
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}
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let { left, top, width, height, expandBtnSize } = node
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if (!this.mindMap.opt.alwaysShowExpandBtn) {
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expandBtnSize = 0
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}
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let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
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node.children.forEach((item, index) => {
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let x1 =
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node.layerIndex === 0 ? left + width / 2 : left + width + expandBtnSize
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let y1 = top + height / 2
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let x2 = item.left
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let y2 = item.top + item.height / 2
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y1 = nodeUseLineStyle && !node.isRoot ? y1 + height / 2 : y1
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y2 = nodeUseLineStyle ? y2 + item.height / 2 : y2
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// 节点使用横线风格，需要额外渲染横线
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let nodeUseLineStylePath = nodeUseLineStyle
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? ` L ${item.left + item.width},${y2}`
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: ''
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let path = `M ${x1},${y1} L ${x2},${y2}` + nodeUseLineStylePath
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lines[index].plot(path)
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style && style(lines[index], item)
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})
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}
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// 曲线风格连线
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renderLineCurve(node, lines, style) {
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if (node.children.length <= 0) {
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return []
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}
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let { left, top, width, height, expandBtnSize } = node
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if (!this.mindMap.opt.alwaysShowExpandBtn) {
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expandBtnSize = 0
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}
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let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
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node.children.forEach((item, index) => {
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let x1 =
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node.layerIndex === 0 ? left + width / 2 : left + width + expandBtnSize
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let y1 = top + height / 2
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let x2 = item.left
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let y2 = item.top + item.height / 2
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let path = ''
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y1 = nodeUseLineStyle && !node.isRoot ? y1 + height / 2 : y1
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y2 = nodeUseLineStyle ? y2 + item.height / 2 : y2
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// 节点使用横线风格，需要额外渲染横线
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let nodeUseLineStylePath = nodeUseLineStyle
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? ` L ${item.left + item.width},${y2}`
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: ''
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if (node.isRoot && !this.mindMap.themeConfig.rootLineKeepSameInCurve) {
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path = this.quadraticCurvePath(x1, y1, x2, y2) + nodeUseLineStylePath
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} else {
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path = this.cubicBezierPath(x1, y1, x2, y2) + nodeUseLineStylePath
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}
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lines[index].plot(path)
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style && style(lines[index], item)
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})
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}
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// 渲染按钮
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renderExpandBtn(node, btn) {
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let { width, height } = node
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let { translateX, translateY } = btn.transform()
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// 节点使用横线风格，需要调整展开收起按钮位置
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let nodeUseLineStyleOffset = this.mindMap.themeConfig.nodeUseLineStyle
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? height / 2
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: 0
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// 位置没有变化则返回
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let _x = width
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let _y = height / 2 + nodeUseLineStyleOffset
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if (_x === translateX && _y === translateY) {
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return
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}
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btn.translate(_x - translateX, _y - translateY)
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}
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// 创建概要节点
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renderGeneralization(node, gLine, gNode) {
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let {
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top,
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bottom,
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right,
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generalizationLineMargin,
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generalizationNodeMargin
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} = this.getNodeBoundaries(node, 'h')
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let x1 = right + generalizationLineMargin
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let y1 = top
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let x2 = right + generalizationLineMargin
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let y2 = bottom
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let cx = x1 + 20
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let cy = y1 + (y2 - y1) / 2
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let path = `M ${x1},${y1} Q ${cx},${cy} ${x2},${y2}`
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gLine.plot(path)
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gNode.left = right + generalizationNodeMargin
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gNode.top = top + (bottom - top - gNode.height) / 2
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}
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// 渲染展开收起按钮的隐藏占位元素
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renderExpandBtnRect(rect, expandBtnSize, width, height, node) {
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rect.size(expandBtnSize, height).x(width).y(0)
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}
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}
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export default LogicalStructure
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