[tools][system-analyzer] Add helper class

This CL adds a helper class for commonly used
helper methods inside web components, decreasing
the amount of duplicated code across the app.

Bug: v8:10667, v8:10644

Change-Id: I754396a9b3598d0930a82fc487857e946bfd3805
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2299359Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Zeynep Cankara <zcankara@google.com>
Cr-Commit-Position: refs/heads/master@{#68899}

tools/system-analyzer/helper.js → tools/system-analyzer/helper.mjs

@@ -29,3 +29,67 @@ function defineCustomElement(name, generator) {
       .then(
           templateText => customElements.define(name, generator(templateText)));
 }
+
+// DOM Helpers
+function removeAllChildren(node) {
+  let range = document.createRange();
+  range.selectNodeContents(node);
+  range.deleteContents();
+}
+
+function $(id) {
+  return document.querySelector(id)
+}
+
+function div(classes) {
+  let node = document.createElement('div');
+  if (classes !== void 0) {
+    if (typeof classes === 'string') {
+      node.classList.add(classes);
+    } else {
+      classes.forEach(cls => node.classList.add(cls));
+    }
+  }
+  return node;
+}
+
+class V8CustomElement extends HTMLElement {
+  constructor(templateText) {
+    super();
+    const shadowRoot = this.attachShadow({mode: 'open'});
+    shadowRoot.innerHTML = templateText;
+  }
+  $(id) {
+    return this.shadowRoot.querySelector(id);
+  }
+
+  querySelectorAll(query) {
+    return this.shadowRoot.querySelectorAll(query);
+  }
+
+  div(classes) {return div(classes)}
+
+  table(className) {
+    let node = document.createElement('table')
+    if (className) node.classList.add(className)
+    return node;
+  }
+
+  td(textOrNode) {
+    let node = document.createElement('td');
+    if (typeof textOrNode === 'object') {
+      node.appendChild(textOrNode);
+    } else {
+      node.innerText = textOrNode;
+    }
+    return node;
+  }
+
+  tr(){
+    return document.createElement('tr');
+  }
+
+  removeAllChildren(node) { return removeAllChildren(node); }
+}
+
+export {defineCustomElement, V8CustomElement, removeAllChildren, $, div};

tools/system-analyzer/ic-panel.mjs

@@ -4,13 +4,12 @@
 
 import {Group} from './ic-model.mjs';
 import CustomIcProcessor from "./ic-processor.mjs";
+import {defineCustomElement, V8CustomElement} from './helper.mjs';
 
 defineCustomElement('ic-panel', (templateText) =>
- class ICPanel extends HTMLElement {
+  class ICPanel extends V8CustomElement {
   constructor() {
-    super();
-    const shadowRoot = this.attachShadow({mode: 'open'});
-    shadowRoot.innerHTML = templateText;
+    super(templateText);
     this.groupKey.addEventListener(
         'change', e => this.updateTable(e));
     this.$('#filterICTimeBtn').addEventListener(
@@ -20,14 +19,6 @@ defineCustomElement('ic-panel', (templateText) =>
     this._endTime = 0;
   }
 
-  $(id) {
-    return this.shadowRoot.querySelector(id);
-  }
-
-  querySelectorAll(query) {
-    return this.shadowRoot.querySelectorAll(query);
-  }
-
   set entries(value){
     this._entries = value;
   }
@@ -108,12 +99,6 @@ defineCustomElement('ic-panel', (templateText) =>
     return a;
   }
 
-  removeAllChildren(node) {
-    while (node.firstChild) {
-      node.removeChild(node.firstChild);
-    }
-  }
-
   td(tr, content, className) {
     let node = document.createElement("td");
     if (typeof content == "object") {

tools/system-analyzer/index.html

@@ -13,7 +13,7 @@ found in the LICENSE file. -->
   <script type="module" src="index.mjs"></script>
   <script type="module" src="index.mjs"></script>
   <link rel="stylesheet" type="text/css" href="./index.css">
-  <script src="helper.js"></script>
+  <script type="module" src="helper.mjs"></script>
 
   <script src="../splaytree.js"></script>
   <script src="../codemap.js"></script>

tools/system-analyzer/log-file-reader.mjs

 // Copyright 2020 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+import {defineCustomElement, V8CustomElement} from './helper.mjs';
 
 defineCustomElement('log-file-reader', (templateText) =>
- class LogFileReader extends HTMLElement {
+ class LogFileReader extends V8CustomElement {
   constructor() {
-    super();
-    const shadowRoot = this.attachShadow({mode: 'open'});
-    shadowRoot.innerHTML = templateText;
+    super(templateText);
     this.addEventListener('click', e => this.handleClick(e));
     this.addEventListener('dragover', e => this.handleDragOver(e));
     this.addEventListener('drop', e => this.handleChange(e));
@@ -15,10 +14,6 @@ defineCustomElement('log-file-reader', (templateText) =>
     this.$('#fileReader').addEventListener('keydown', e => this.handleKeyEvent(e));
   }
 
-  $(id) {
-    return this.shadowRoot.querySelector(id);
-  }
-
   get section() {
     return this.$('#fileReaderSection');
   }

tools/system-analyzer/map-model.mjs

@@ -3,6 +3,9 @@
 // found in the LICENSE file.
 
 import {kChunkWidth, kChunkHeight} from './map-processor.mjs';
+import {div, removeAllChildren, $} from './helper.mjs';
+
+
 
 class State {
   constructor(mapPanelId, timelinePanelId) {
@@ -68,60 +71,6 @@ class State {
   }
 }
 
-// =========================================================================
-// DOM Helper
-function $(id) {
-  return document.querySelector(id)
-}
-
-function removeAllChildren(node) {
-  while (node.lastChild) {
-    node.removeChild(node.lastChild);
-  }
-}
-
-function selectOption(select, match) {
-  let options = select.options;
-  for (let i = 0; i < options.length; i++) {
-    if (match(i, options[i])) {
-      select.selectedIndex = i;
-      return;
-    }
-  }
-}
-
-function div(classes) {
-  let node = document.createElement('div');
-  if (classes !== void 0) {
-    if (typeof classes === 'string') {
-      node.classList.add(classes);
-    } else {
-      classes.forEach(cls => node.classList.add(cls));
-    }
-  }
-  return node;
-}
-
-function table(className) {
-  let node = document.createElement('table')
-  if (className) node.classList.add(className)
-  return node;
-}
-
-function td(textOrNode) {
-  let node = document.createElement('td');
-  if (typeof textOrNode === 'object') {
-    node.appendChild(textOrNode);
-  } else {
-    node.innerText = textOrNode;
-  }
-  return node;
-}
-
-function tr() {
-  return document.createElement('tr');
-}
-
 class Navigation {
   constructor(state, view) {
     this.state = state;
@@ -695,4 +644,4 @@ function transitionTypeToColor(type) {
   return '#9B6EDC';
 }
 
-export { State, div, table, tr, td};
+export { State };
\ No newline at end of file

tools/system-analyzer/map-panel.mjs

@@ -3,27 +3,18 @@
 // found in the LICENSE file.
 import "./stats-panel.mjs";
 import {V8Map} from "./map-processor.mjs";
+import {defineCustomElement, V8CustomElement} from './helper.mjs';
 
 defineCustomElement('map-panel', (templateText) =>
- class MapPanel extends HTMLElement {
+ class MapPanel extends V8CustomElement {
   constructor() {
-    super();
-    const shadowRoot = this.attachShadow({mode: 'open'});
-    shadowRoot.innerHTML = templateText;
+    super(templateText);
     this.transitionView.addEventListener(
         'mousemove', e => this.handleTransitionViewChange(e));
     this.$('#searchBarBtn').addEventListener(
         'click', e => this.handleSearchBar(e));
   }
 
-  $(id) {
-    return this.shadowRoot.querySelector(id);
-  }
-
-  querySelectorAll(query) {
-    return this.shadowRoot.querySelectorAll(query);
-  }
-
   get transitionView() {
     return this.$('#transitionView');
   }

tools/system-analyzer/stats-panel.mjs

 // Copyright 2020 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-import {div, table, tr, td} from './map-model.mjs';
+import {V8CustomElement, defineCustomElement} from './helper.mjs';
 
 defineCustomElement('stats-panel', (templateText) =>
- class StatsPanel extends HTMLElement {
+ class StatsPanel extends V8CustomElement {
   constructor() {
-    super();
-    const shadowRoot = this.attachShadow({mode: 'open'});
-    shadowRoot.innerHTML = templateText;
+    super(templateText);
     this.timeline_ = undefined;
   }
 
-  $(id) {
-    return this.shadowRoot.querySelector(id);
-  }
-
-  querySelectorAll(query) {
-    return this.shadowRoot.querySelectorAll(query);
-  }
-
   get stats() {
     return this.$('#stats');
   }
 
-
-  // decouple stats panel
-  removeAllChildren(node) {
-    while (node.lastChild) {
-      node.removeChild(node.lastChild);
-    }
-  }
-
   set timeline(value){
     this.timeline_ = value;
   }
@@ -68,18 +50,18 @@ defineCustomElement('stats-panel', (templateText) =>
     ];
 
     let text = '';
-    let tableNode = table('transitionType');
+    let tableNode = this.table('transitionType');
     tableNode.innerHTML =
         '<thead><tr><td>Color</td><td>Type</td><td>Count</td><td>Percent</td></tr></thead>';
     let name, filter;
     //TODO(zc) timeline
     let total = this.timeline.size();
     pairs.forEach(([name, color, filter]) => {
-      let row = tr();
+      let row = this.tr();
       if (color !== null) {
-        row.appendChild(td(div(['colorbox', color])));
+        row.appendChild(this.td(this.div(['colorbox', color])));
       } else {
-        row.appendChild(td(''));
+        row.appendChild(this.td(''));
       }
       row.onclick = (e) => {
         // lazily compute the stats
@@ -90,32 +72,32 @@ defineCustomElement('stats-panel', (templateText) =>
         this.dispatchEvent(new CustomEvent(
           'change', {bubbles: true, composed: true, detail: node.maps}));
       };
-      row.appendChild(td(name));
+      row.appendChild(this.td(name));
       let count = this.timeline.count(filter);
-      row.appendChild(td(count));
+      row.appendChild(this.td(count));
       let percent = Math.round(count / total * 1000) / 10;
-      row.appendChild(td(percent.toFixed(1) + '%'));
+      row.appendChild(this.td(percent.toFixed(1) + '%'));
       tableNode.appendChild(row);
     });
     this.stats.appendChild(tableNode);
   }
 
   updateNamedTransitionsStats() {
-    let tableNode = table('transitionTable');
+    let tableNode = this.table('transitionTable');
     let nameMapPairs = Array.from(this.timeline.transitions.entries());
     tableNode.innerHTML =
         '<thead><tr><td>Propery Name</td><td>#</td></tr></thead>';
     nameMapPairs.sort((a, b) => b[1].length - a[1].length).forEach(([
                                                                      name, maps
                                                                    ]) => {
-      let row = tr();
+      let row = this.tr();
       row.maps = maps;
      row.addEventListener(
       'click',
       e => this.dispatchEvent(new CustomEvent(
         'change', {bubbles: true, composed: true, detail: e.target.parentNode.maps.map(map => map.to)})));
-      row.appendChild(td(name));
-      row.appendChild(td(maps.length));
+      row.appendChild(this.td(name));
+      row.appendChild(this.td(maps.length));
       tableNode.appendChild(row);
     });
     this.stats.appendChild(tableNode);

tools/system-analyzer/timeline-panel.mjs

 // Copyright 2020 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+import {defineCustomElement, V8CustomElement} from './helper.mjs';
 
 defineCustomElement('timeline-panel', (templateText) =>
- class TimelinePanel extends HTMLElement {
+ class TimelinePanel extends V8CustomElement {
   constructor() {
-    super();
-    const shadowRoot = this.attachShadow({mode: 'open'});
-    shadowRoot.innerHTML = templateText;
+    super(templateText);
     this.timelineOverview.addEventListener(
         'mousemove', e => this.handleTimelineIndicatorMove(e));
   }
 
-
-  $(id) {
-    return this.shadowRoot.querySelector(id);
-  }
-
-  querySelectorAll(query) {
-    return this.shadowRoot.querySelectorAll(query);
-  }
-
   get timelineOverview() {
     return this.$('#timelineOverview');
   }
@@ -41,7 +31,6 @@ defineCustomElement('timeline-panel', (templateText) =>
     return this.$('#timeline');
   }
 
-
   handleTimelineIndicatorMove(event) {
     if (event.buttons == 0) return;
     let timelineTotalWidth = this.timelineCanvas.offsetWidth;