fix: calc 引起的 dancePalette 问题

2021-06-22 11:15:10 +08:00 · 2021-06-22 11:15:10 +08:00 · cdea1f2ba6
commit cdea1f2ba6
parent 5c155bf66f
4 changed files with 369 additions and 412 deletions
--- a/lib/calc.js
+++ b/lib/calc.js
@ -1,4 +1,4 @@
-var calculate = function (s) {
+module.exports = function (s) {
  s = s.trim();
  const stack = new Array();
  let preSign = '+';
@ -45,6 +45,4 @@ var calculate = function (s) {
    ans += stack.pop();
  }
  return ans;
-};
-
-module.exports = calculate;
+};
--- a/lib/pen.js
+++ b/lib/pen.js
@ -1,33 +1,38 @@
 const QR = require('./qrcode.js');
 const GD = require('./gradient.js');

+export const penCache = {
+  // 用于存储带 id 的 view 的 rect 信息
+  viewRect: {},
+  textLines: {},
+};
+export const clearPenCache = id => {
+  if (id) {
+    penCache.viewRect[id] = null;
+    penCache.textLines[id] = null;
+  } else {
+    penCache.viewRect = {};
+    penCache.textLines = {};
+  }
+};
 export default class Painter {
  constructor(ctx, data) {
    this.ctx = ctx;
    this.data = data;
  }

-  isMoving = false;
-  // 动态模板时的缓存，加速渲染
-  movingCache = {};
-  callbackInfo = {};
-  // 用于存储带 id 的 view 的 rect 信息
-  viewRect = {};
-  paint(callback, isMoving, movingCache) {
+  paint(callback) {
    this.style = {
      width: this.data.width.toPx(),
      height: this.data.height.toPx(),
    };
-    if (isMoving) {
-      this.isMoving = true;
-      this.movingCache = movingCache;
-    }
+
    this._background();
    for (const view of this.data.views) {
      this._drawAbsolute(view);
    }
    this.ctx.draw(false, () => {
-      callback && callback(this.callbackInfo);
+      callback && callback();
    });
  }

@ -262,14 +267,14 @@ export default class Painter {
          width = Math.round(view.sWidth / ratio);
          height = Math.round(view.sHeight / ratio);
        } else if (view.css.width === 'auto') {
-          height = view.css.height.toPx(false, this.style.height, this.viewRect);
+          height = view.css.height.toPx(false, this.style.height);
          width = (view.sWidth / view.sHeight) * height;
        } else if (view.css.height === 'auto') {
-          width = view.css.width.toPx(false, this.style.width, this.viewRect);
+          width = view.css.width.toPx(false, this.style.width);
          height = (view.sHeight / view.sWidth) * width;
        } else {
-          width = view.css.width.toPx(false, this.style.width, this.viewRect);
-          height = view.css.height.toPx(false, this.style.height, this.viewRect);
+          width = view.css.width.toPx(false, this.style.width);
+          height = view.css.height.toPx(false, this.style.height);
        }
        break;
      }
@ -278,26 +283,29 @@ export default class Painter {
          console.error('You should set width and height');
          return;
        }
-        width = view.css.width.toPx(false, this.style.width, this.viewRect);
-        height = view.css.height.toPx(false, this.style.height, this.viewRect);
+        width = view.css.width.toPx(false, this.style.width);
+        height = view.css.height.toPx(false, this.style.height);
        break;
    }
    let x;
    if (view.css && view.css.right) {
      if (typeof view.css.right === 'string') {
-        x = this.style.width - view.css.right.toPx(true, this.style.width, this.viewRect);
+        x = this.style.width - view.css.right.toPx(true, this.style.width);
      } else {
        // 可以用数组方式，把文字长度计算进去
        // [right, 文字id, 乘数（默认 1）]
        const rights = view.css.right;
-        x = this.style.width - rights[0].toPx(true, this.style.width) - this.viewRect[rights[1]].width * (rights[2] || 1);
+        x =
+          this.style.width -
+          rights[0].toPx(true, this.style.width) -
+          penCache.viewRect[rights[1]].width * (rights[2] || 1);
      }
    } else if (view.css && view.css.left) {
      if (typeof view.css.left === 'string') {
-        x = view.css.left.toPx(true, this.style.width, this.viewRect);
+        x = view.css.left.toPx(true, this.style.width);
      } else {
        const lefts = view.css.left;
-        x = lefts[0].toPx(true, this.style.width) + this.viewRect[lefts[1]].width * (lefts[2] || 1);
+        x = lefts[0].toPx(true, this.style.width) + penCache.viewRect[lefts[1]].width * (lefts[2] || 1);
      }
    } else {
      x = 0;
@ -305,14 +313,14 @@ export default class Painter {
    //const y = view.css && view.css.bottom ? this.style.height - height - view.css.bottom.toPx(true) : (view.css && view.css.top ? view.css.top.toPx(true) : 0);
    let y;
    if (view.css && view.css.bottom) {
-      y = this.style.height - height - view.css.bottom.toPx(true, this.style.height, this.viewRect);
+      y = this.style.height - height - view.css.bottom.toPx(true, this.style.height);
    } else {
      if (view.css && view.css.top) {
        if (typeof view.css.top === 'string') {
-          y = view.css.top.toPx(true, this.style.height, this.viewRect);
+          y = view.css.top.toPx(true, this.style.height);
        } else {
          const tops = view.css.top;
-          y = tops[0].toPx(true, this.style.height) + this.viewRect[tops[1]].height * (tops[2] || 1);
+          y = tops[0].toPx(true, this.style.height) + penCache.viewRect[tops[1]].height * (tops[2] || 1);
        }
      } else {
        y = 0;
@ -396,7 +404,7 @@ export default class Painter {
    }
    this._doShadow(view);
    if (view.id) {
-      this.viewRect[view.id] = {
+      penCache.viewRect[view.id] = {
        width,
        height,
        left: x,
@ -520,10 +528,9 @@ export default class Painter {
    this.ctx.save();
    const { width, height, extra } = this._preProcess(view, view.css.background && view.css.borderRadius);
    this.ctx.fillStyle = view.css.color || 'black';
-    if (this.isMoving && JSON.stringify(this.movingCache) !== JSON.stringify({})) {
-      this.viewRect[view.id] = this.movingCache.viewRect;
+    if (view.id && penCache.textLines[view.id]) {
      this.ctx.textAlign = view.css.textAlign ? view.css.textAlign : 'left';
-      for (const i of this.movingCache.lineArray) {
+      for (const i of penCache.textLines[view.id]) {
        const { measuredWith, text, x, y, textDecoration } = i;
        if (view.css.textStyle === 'stroke') {
          this.ctx.strokeText(text, x, y, measuredWith);
@ -550,12 +557,7 @@ export default class Painter {
          const _w = this.ctx.measureText(textArray[i]).width;
          textWidth = _w > textWidth ? _w : textWidth;
        }
-        this.viewRect[view.id].width = width ? (textWidth < width ? textWidth : width) : textWidth;
-        if (!this.isMoving) {
-          Object.assign(this.callbackInfo, {
-            viewRect: this.viewRect[view.id],
-          });
-        }
+        penCache.viewRect[view.id].width = width ? (textWidth < width ? textWidth : width) : textWidth;
      }
      let lineIndex = 0;
      for (let j = 0; j < textArray.length; ++j) {
@ -619,6 +621,7 @@ export default class Painter {
              lineX = x;
              break;
          }
+
          const y =
            -(height / 2) +
            (lineIndex === 0 ? view.css.fontSize.toPx() : view.css.fontSize.toPx() + lineIndex * lineHeight);
@ -661,16 +664,16 @@ export default class Painter {
            this.ctx.strokeStyle = view.css.color;
            this.ctx.stroke();
          }
-          if (!this.isMoving) {
-            this.callbackInfo.lineArray
-              ? this.callbackInfo.lineArray.push({
+          if (view.id) {
+            penCache.textLines[view.id]
+              ? penCache.textLines[view.id].push({
                  text,
                  x,
                  y,
                  measuredWith,
                  textDecoration,
                })
-              : (this.callbackInfo.lineArray = [
+              : (penCache.textLines[view.id] = [
                  {
                    text,
                    x,
--- a/painter.js
+++ b/painter.js
--- a/painter.wxml
+++ b/painter.wxml
@ -1,31 +1,21 @@
 <view style='position: relative;{{customStyle}};{{painterStyle}}'>
  <block wx:if="{{!use2D}}">
    <canvas canvas-id="photo" style="{{photoStyle}};position: absolute; left: -9999px; top: -9999rpx;" />
-    <canvas canvas-id="bottom" style="{{painterStyle}};position: absolute;" />
-    <canvas canvas-id="k-canvas" style="{{painterStyle}};position: absolute;" />
-    <canvas canvas-id="top" style="{{painterStyle}};position: absolute;" />
-    <canvas 
-      canvas-id="front" 
-      style="{{painterStyle}};position: absolute;"
-      bindtouchstart="onTouchStart"
-      bindtouchmove="onTouchMove"
-      bindtouchend="onTouchEnd"
-      bindtouchcancel="onTouchCancel"
-      disable-scroll="{{true}}" />
+    <block wx:if="{{dancePalette}}">
+      <canvas canvas-id="bottom" style="{{painterStyle}};position: absolute;" />
+      <canvas canvas-id="k-canvas" style="{{painterStyle}};position: absolute;" />
+      <canvas canvas-id="top" style="{{painterStyle}};position: absolute;" />
+      <canvas 
+        canvas-id="front" 
+        style="{{painterStyle}};position: absolute;"
+        bindtouchstart="onTouchStart"
+        bindtouchmove="onTouchMove"
+        bindtouchend="onTouchEnd"
+        bindtouchcancel="onTouchCancel"
+        disable-scroll="{{true}}" />
+      </block>
  </block>
  <block wx:if="{{use2D}}">
    <canvas type="2d" id="photo" style="{{photoStyle}};" />
-    <!-- <canvas type="2d" id="bottom" style="{{painterStyle}};position: absolute;" />
-    <canvas type="2d" id="k-canvas" style="{{painterStyle}};position: absolute;" />
-    <canvas type="2d" id="top" style="{{painterStyle}};position: absolute;" />
-    <canvas 
-      type="2d"
-      id="front" 
-      style="{{painterStyle}};position: absolute;"
-      bindtouchstart="onTouchStart"
-      bindtouchmove="onTouchMove"
-      bindtouchend="onTouchEnd"
-      bindtouchcancel="onTouchCancel"
-      disable-scroll="{{true}}" /> -->
  </block>
 </view>