| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| // FIXME emphasis label position is not same with normal label position |
| import {parsePercent} from '../../util/number'; |
| import PieSeriesModel, { PieSeriesOption, PieDataItemOption } from './PieSeries'; |
| import { VectorArray } from 'zrender/src/core/vector'; |
| import { HorizontalAlign, ZRTextAlign } from '../../util/types'; |
| import { Sector, Polyline, Point } from '../../util/graphic'; |
| import ZRText from 'zrender/src/graphic/Text'; |
| import BoundingRect, {RectLike} from 'zrender/src/core/BoundingRect'; |
| import { each } from 'zrender/src/core/util'; |
| import { limitTurnAngle, limitSurfaceAngle } from '../../label/labelGuideHelper'; |
| import { shiftLayoutOnY } from '../../label/labelLayoutHelper'; |
| |
| const RADIAN = Math.PI / 180; |
| |
| interface LabelLayout { |
| label: ZRText, |
| labelLine: Polyline, |
| position: PieSeriesOption['label']['position'], |
| len: number |
| len2: number |
| minTurnAngle: number |
| maxSurfaceAngle: number |
| surfaceNormal: Point |
| linePoints: VectorArray[] |
| textAlign: HorizontalAlign |
| labelDistance: number, |
| labelAlignTo: PieSeriesOption['label']['alignTo'], |
| edgeDistance: number, |
| bleedMargin: PieSeriesOption['label']['bleedMargin'], |
| rect: BoundingRect |
| } |
| |
| function adjustSingleSide( |
| list: LabelLayout[], |
| cx: number, |
| cy: number, |
| r: number, |
| dir: -1 | 1, |
| viewWidth: number, |
| viewHeight: number, |
| viewLeft: number, |
| viewTop: number, |
| farthestX: number |
| ) { |
| if (list.length < 2) { |
| return; |
| } |
| |
| interface SemiInfo { |
| list: LabelLayout[] |
| rB: number |
| maxY: number |
| }; |
| |
| function recalculateXOnSemiToAlignOnEllipseCurve(semi: SemiInfo) { |
| const rB = semi.rB; |
| const rB2 = rB * rB; |
| for (let i = 0; i < semi.list.length; i++) { |
| const item = semi.list[i]; |
| const dy = Math.abs(item.label.y - cy); |
| // horizontal r is always same with original r because x is not changed. |
| const rA = r + item.len; |
| const rA2 = rA * rA; |
| // Use ellipse implicit function to calculate x |
| const dx = Math.sqrt((1 - Math.abs(dy * dy / rB2)) * rA2); |
| item.label.x = cx + (dx + item.len2) * dir; |
| } |
| } |
| |
| // Adjust X based on the shifted y. Make tight labels aligned on an ellipse curve. |
| function recalculateX(items: LabelLayout[]) { |
| // Extremes of |
| const topSemi = { list: [], maxY: 0} as SemiInfo; |
| const bottomSemi = { list: [], maxY: 0 } as SemiInfo; |
| |
| for (let i = 0; i < items.length; i++) { |
| if (items[i].labelAlignTo !== 'none') { |
| continue; |
| } |
| const item = items[i]; |
| const semi = item.label.y > cy ? bottomSemi : topSemi; |
| const dy = Math.abs(item.label.y - cy); |
| if (dy > semi.maxY) { |
| const dx = item.label.x - cx - item.len2 * dir; |
| // horizontal r is always same with original r because x is not changed. |
| const rA = r + item.len; |
| // Canculate rB based on the topest / bottemest label. |
| const rB = dx < rA |
| ? Math.sqrt(dy * dy / (1 - dx * dx / rA / rA)) |
| : rA; |
| semi.rB = rB; |
| semi.maxY = dy; |
| } |
| semi.list.push(item); |
| } |
| |
| recalculateXOnSemiToAlignOnEllipseCurve(topSemi); |
| recalculateXOnSemiToAlignOnEllipseCurve(bottomSemi); |
| } |
| |
| const len = list.length; |
| for (let i = 0; i < len; i++) { |
| if (list[i].position === 'outer' && list[i].labelAlignTo === 'labelLine') { |
| const dx = list[i].label.x - farthestX; |
| list[i].linePoints[1][0] += dx; |
| list[i].label.x = farthestX; |
| } |
| } |
| |
| if (shiftLayoutOnY(list, viewTop, viewTop + viewHeight)) { |
| recalculateX(list); |
| } |
| } |
| |
| function avoidOverlap( |
| labelLayoutList: LabelLayout[], |
| cx: number, |
| cy: number, |
| r: number, |
| viewWidth: number, |
| viewHeight: number, |
| viewLeft: number, |
| viewTop: number |
| ) { |
| const leftList = []; |
| const rightList = []; |
| let leftmostX = Number.MAX_VALUE; |
| let rightmostX = -Number.MAX_VALUE; |
| for (let i = 0; i < labelLayoutList.length; i++) { |
| const label = labelLayoutList[i].label; |
| if (isPositionCenter(labelLayoutList[i])) { |
| continue; |
| } |
| if (label.x < cx) { |
| leftmostX = Math.min(leftmostX, label.x); |
| leftList.push(labelLayoutList[i]); |
| } |
| else { |
| rightmostX = Math.max(rightmostX, label.x); |
| rightList.push(labelLayoutList[i]); |
| } |
| } |
| |
| adjustSingleSide(rightList, cx, cy, r, 1, viewWidth, viewHeight, viewLeft, viewTop, rightmostX); |
| adjustSingleSide(leftList, cx, cy, r, -1, viewWidth, viewHeight, viewLeft, viewTop, leftmostX); |
| |
| for (let i = 0; i < labelLayoutList.length; i++) { |
| const layout = labelLayoutList[i]; |
| const label = layout.label; |
| if (isPositionCenter(layout)) { |
| continue; |
| } |
| |
| const linePoints = layout.linePoints; |
| if (linePoints) { |
| const isAlignToEdge = layout.labelAlignTo === 'edge'; |
| |
| let realTextWidth = layout.rect.width; |
| let targetTextWidth; |
| if (isAlignToEdge) { |
| if (label.x < cx) { |
| targetTextWidth = linePoints[2][0] - layout.labelDistance |
| - viewLeft - layout.edgeDistance; |
| } |
| else { |
| targetTextWidth = viewLeft + viewWidth - layout.edgeDistance |
| - linePoints[2][0] - layout.labelDistance; |
| } |
| } |
| else { |
| if (label.x < cx) { |
| targetTextWidth = label.x - viewLeft - layout.bleedMargin; |
| } |
| else { |
| targetTextWidth = viewLeft + viewWidth - label.x - layout.bleedMargin; |
| } |
| } |
| if (targetTextWidth < layout.rect.width) { |
| // TODOTODO |
| // layout.text = textContain.truncateText(layout.text, targetTextWidth, layout.font); |
| layout.label.style.width = targetTextWidth; |
| if (layout.labelAlignTo === 'edge') { |
| realTextWidth = targetTextWidth; |
| // realTextWidth = textContain.getWidth(layout.text, layout.font); |
| } |
| } |
| |
| const dist = linePoints[1][0] - linePoints[2][0]; |
| if (isAlignToEdge) { |
| if (label.x < cx) { |
| linePoints[2][0] = viewLeft + layout.edgeDistance + realTextWidth + layout.labelDistance; |
| } |
| else { |
| linePoints[2][0] = viewLeft + viewWidth - layout.edgeDistance |
| - realTextWidth - layout.labelDistance; |
| } |
| } |
| else { |
| if (label.x < cx) { |
| linePoints[2][0] = label.x + layout.labelDistance; |
| } |
| else { |
| linePoints[2][0] = label.x - layout.labelDistance; |
| } |
| linePoints[1][0] = linePoints[2][0] + dist; |
| } |
| linePoints[1][1] = linePoints[2][1] = label.y; |
| } |
| } |
| } |
| |
| function isPositionCenter(sectorShape: LabelLayout) { |
| // Not change x for center label |
| return sectorShape.position === 'center'; |
| } |
| |
| export default function pieLabelLayout( |
| seriesModel: PieSeriesModel |
| ) { |
| const data = seriesModel.getData(); |
| const labelLayoutList: LabelLayout[] = []; |
| let cx; |
| let cy; |
| let hasLabelRotate = false; |
| const minShowLabelRadian = (seriesModel.get('minShowLabelAngle') || 0) * RADIAN; |
| |
| const viewRect = data.getLayout('viewRect') as RectLike; |
| const r = data.getLayout('r') as number; |
| const viewWidth = viewRect.width; |
| const viewLeft = viewRect.x; |
| const viewTop = viewRect.y; |
| const viewHeight = viewRect.height; |
| |
| function setNotShow(el: {ignore: boolean}) { |
| el.ignore = true; |
| } |
| |
| function isLabelShown(label: ZRText) { |
| if (!label.ignore) { |
| return true; |
| } |
| for (const key in label.states) { |
| if (label.states[key].ignore === false) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| data.each(function (idx) { |
| const sector = data.getItemGraphicEl(idx) as Sector; |
| const sectorShape = sector.shape; |
| const label = sector.getTextContent(); |
| const labelLine = sector.getTextGuideLine(); |
| |
| const itemModel = data.getItemModel<PieDataItemOption>(idx); |
| const labelModel = itemModel.getModel('label'); |
| // Use position in normal or emphasis |
| const labelPosition = labelModel.get('position') || itemModel.get(['emphasis', 'label', 'position']); |
| const labelDistance = labelModel.get('distanceToLabelLine'); |
| const labelAlignTo = labelModel.get('alignTo'); |
| const edgeDistance = parsePercent(labelModel.get('edgeDistance'), viewWidth); |
| const bleedMargin = labelModel.get('bleedMargin'); |
| |
| const labelLineModel = itemModel.getModel('labelLine'); |
| let labelLineLen = labelLineModel.get('length'); |
| labelLineLen = parsePercent(labelLineLen, viewWidth); |
| let labelLineLen2 = labelLineModel.get('length2'); |
| labelLineLen2 = parsePercent(labelLineLen2, viewWidth); |
| |
| if (Math.abs(sectorShape.endAngle - sectorShape.startAngle) < minShowLabelRadian) { |
| each(label.states, setNotShow); |
| label.ignore = true; |
| return; |
| } |
| |
| if (!isLabelShown(label)) { |
| return; |
| } |
| |
| const midAngle = (sectorShape.startAngle + sectorShape.endAngle) / 2; |
| const nx = Math.cos(midAngle); |
| const ny = Math.sin(midAngle); |
| |
| let textX; |
| let textY; |
| let linePoints; |
| let textAlign: ZRTextAlign; |
| |
| cx = sectorShape.cx; |
| cy = sectorShape.cy; |
| |
| |
| const isLabelInside = labelPosition === 'inside' || labelPosition === 'inner'; |
| if (labelPosition === 'center') { |
| textX = sectorShape.cx; |
| textY = sectorShape.cy; |
| textAlign = 'center'; |
| } |
| else { |
| const x1 = (isLabelInside ? (sectorShape.r + sectorShape.r0) / 2 * nx : sectorShape.r * nx) + cx; |
| const y1 = (isLabelInside ? (sectorShape.r + sectorShape.r0) / 2 * ny : sectorShape.r * ny) + cy; |
| |
| textX = x1 + nx * 3; |
| textY = y1 + ny * 3; |
| |
| if (!isLabelInside) { |
| // For roseType |
| const x2 = x1 + nx * (labelLineLen + r - sectorShape.r); |
| const y2 = y1 + ny * (labelLineLen + r - sectorShape.r); |
| const x3 = x2 + ((nx < 0 ? -1 : 1) * labelLineLen2); |
| const y3 = y2; |
| |
| if (labelAlignTo === 'edge') { |
| // Adjust textX because text align of edge is opposite |
| textX = nx < 0 |
| ? viewLeft + edgeDistance |
| : viewLeft + viewWidth - edgeDistance; |
| } |
| else { |
| textX = x3 + (nx < 0 ? -labelDistance : labelDistance); |
| } |
| textY = y3; |
| linePoints = [[x1, y1], [x2, y2], [x3, y3]]; |
| } |
| |
| textAlign = isLabelInside |
| ? 'center' |
| : (labelAlignTo === 'edge' |
| ? (nx > 0 ? 'right' : 'left') |
| : (nx > 0 ? 'left' : 'right')); |
| } |
| |
| let labelRotate; |
| const rotate = labelModel.get('rotate'); |
| if (typeof rotate === 'number') { |
| labelRotate = rotate * (Math.PI / 180); |
| } |
| else { |
| labelRotate = rotate |
| ? (nx < 0 ? -midAngle + Math.PI : -midAngle) |
| : 0; |
| } |
| |
| hasLabelRotate = !!labelRotate; |
| |
| label.x = textX; |
| label.y = textY; |
| label.rotation = labelRotate; |
| |
| label.setStyle({ |
| verticalAlign: 'middle' |
| }); |
| |
| // Not sectorShape the inside label |
| if (!isLabelInside) { |
| const textRect = label.getBoundingRect().clone(); |
| textRect.applyTransform(label.getComputedTransform()); |
| // Text has a default 1px stroke. Exclude this. |
| const margin = (label.style.margin || 0) + 2.1; |
| textRect.y -= margin / 2; |
| textRect.height += margin; |
| |
| labelLayoutList.push({ |
| label, |
| labelLine, |
| position: labelPosition, |
| len: labelLineLen, |
| len2: labelLineLen2, |
| minTurnAngle: labelLineModel.get('minTurnAngle'), |
| maxSurfaceAngle: labelLineModel.get('maxSurfaceAngle'), |
| surfaceNormal: new Point(nx, ny), |
| linePoints: linePoints, |
| textAlign: textAlign, |
| labelDistance: labelDistance, |
| labelAlignTo: labelAlignTo, |
| edgeDistance: edgeDistance, |
| bleedMargin: bleedMargin, |
| rect: textRect |
| }); |
| } |
| else { |
| label.setStyle({ |
| align: textAlign |
| }); |
| const selectState = label.states.select; |
| if (selectState) { |
| selectState.x += label.x; |
| selectState.y += label.y; |
| } |
| } |
| sector.setTextConfig({ |
| inside: isLabelInside |
| }); |
| }); |
| |
| if (!hasLabelRotate && seriesModel.get('avoidLabelOverlap')) { |
| avoidOverlap(labelLayoutList, cx, cy, r, viewWidth, viewHeight, viewLeft, viewTop); |
| } |
| |
| for (let i = 0; i < labelLayoutList.length; i++) { |
| const layout = labelLayoutList[i]; |
| const label = layout.label; |
| const labelLine = layout.labelLine; |
| const notShowLabel = isNaN(label.x) || isNaN(label.y); |
| if (label) { |
| label.setStyle({ |
| align: layout.textAlign |
| }); |
| if (notShowLabel) { |
| each(label.states, setNotShow); |
| label.ignore = true; |
| } |
| const selectState = label.states.select; |
| if (selectState) { |
| selectState.x += label.x; |
| selectState.y += label.y; |
| } |
| } |
| if (labelLine) { |
| const linePoints = layout.linePoints; |
| if (notShowLabel || !linePoints) { |
| each(labelLine.states, setNotShow); |
| labelLine.ignore = true; |
| } |
| else { |
| limitTurnAngle(linePoints, layout.minTurnAngle); |
| limitSurfaceAngle(linePoints, layout.surfaceNormal, layout.maxSurfaceAngle); |
| |
| labelLine.setShape({ points: linePoints }); |
| |
| // Set the anchor to the midpoint of sector |
| label.__hostTarget.textGuideLineConfig = { |
| anchor: new Point(linePoints[0][0], linePoints[0][1]) |
| }; |
| } |
| } |
| } |
| } |