Method render

deps/v8/tools/profview/profview.js:1468–1529

(newState)

  }

  render(newState) {
    let oldState = this.currentState;
    if (!newState.file || !newState.viewingSource) {
      this.table.style.display = "none";
      this.hideButton.style.display = "none";
      this.currentState = null;
      return;
    }
    if (oldState) {
      if (newState.file === oldState.file &&
          newState.currentCodeId === oldState.currentCodeId &&
          newState.viewingSource === oldState.viewingSource) {
        // No change, nothing to do.
        return;
      }
    }
    this.currentState = newState;

    this.table.style.display = "inline-block";
    this.hideButton.style.display = "inline";
    removeAllChildren(this.table);

    let functionId =
        this.currentState.file.code[this.currentState.currentCodeId].func;
    let sourceView =
        this.currentState.sourceData.generateSourceView(functionId);
    for (let i = 0; i < sourceView.source.length; i++) {
      let sampleCount = sourceView.lineSampleCounts[i] || 0;
      let sampleProportion = sourceView.samplesTotal > 0 ?
                             sampleCount / sourceView.samplesTotal : 0;
      let heatBucket;
      if (sampleProportion === 0) {
        heatBucket = "line-none";
      } else if (sampleProportion < 0.2) {
        heatBucket = "line-cold";
      } else if (sampleProportion < 0.4) {
        heatBucket = "line-mediumcold";
      } else if (sampleProportion < 0.6) {
        heatBucket = "line-mediumhot";
      } else if (sampleProportion < 0.8) {
        heatBucket = "line-hot";
      } else {
        heatBucket = "line-superhot";
      }

      let row = this.table.insertRow(-1);

      let lineNumberCell = row.insertCell(-1);
      lineNumberCell.classList.add("source-line-number");
      lineNumberCell.textContent = i + sourceView.firstLineNumber;

      let sampleCountCell = row.insertCell(-1);
      sampleCountCell.classList.add(heatBucket);
      sampleCountCell.textContent = sampleCount;

      let sourceLineCell = row.insertCell(-1);
      sourceLineCell.classList.add(heatBucket);
      sourceLineCell.textContent = sourceView.source[i];