DevTools: extract modules (with extensions)

third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js

-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/**
- * @unrestricted
- */
-UI.OverviewGrid = class {
-  /**
-   * @param {string} prefix
-   */
-  constructor(prefix) {
-    this.element = createElement('div');
-    this.element.id = prefix + '-overview-container';
-
-    this._grid = new UI.TimelineGrid();
-    this._grid.element.id = prefix + '-overview-grid';
-    this._grid.setScrollTop(0);
-
-    this.element.appendChild(this._grid.element);
-
-    this._window = new UI.OverviewGrid.Window(this.element, this._grid.dividersLabelBarElement);
-  }
-
-  /**
-   * @return {number}
-   */
-  clientWidth() {
-    return this.element.clientWidth;
-  }
-
-  /**
-   * @param {!UI.TimelineGrid.Calculator} calculator
-   */
-  updateDividers(calculator) {
-    this._grid.updateDividers(calculator);
-  }
-
-  /**
-   * @param {!Array.<!Element>} dividers
-   */
-  addEventDividers(dividers) {
-    this._grid.addEventDividers(dividers);
-  }
-
-  removeEventDividers() {
-    this._grid.removeEventDividers();
-  }
-
-  reset() {
-    this._window.reset();
-  }
-
-  /**
-   * @return {number}
-   */
-  windowLeft() {
-    return this._window.windowLeft;
-  }
-
-  /**
-   * @return {number}
-   */
-  windowRight() {
-    return this._window.windowRight;
-  }
-
-  /**
-   * @param {number} left
-   * @param {number} right
-   */
-  setWindow(left, right) {
-    this._window._setWindow(left, right);
-  }
-
-  /**
-   * @param {symbol} eventType
-   * @param {function(!Common.Event)} listener
-   * @param {!Object=} thisObject
-   * @return {!Common.EventTarget.EventDescriptor}
-   */
-  addEventListener(eventType, listener, thisObject) {
-    return this._window.addEventListener(eventType, listener, thisObject);
-  }
-
-  /**
-   * @param {?function(!Event):boolean} clickHandler
-   */
-  setClickHandler(clickHandler) {
-    this._window.setClickHandler(clickHandler);
-  }
-
-  /**
-   * @param {number} zoomFactor
-   * @param {number} referencePoint
-   */
-  zoom(zoomFactor, referencePoint) {
-    this._window._zoom(zoomFactor, referencePoint);
-  }
-
-  /**
-   * @param {boolean} enabled
-   */
-  setResizeEnabled(enabled) {
-    this._window.setEnabled(enabled);
-  }
-};
-
-UI.OverviewGrid.MinSelectableSize = 14;
-
-UI.OverviewGrid.WindowScrollSpeedFactor = .3;
-
-UI.OverviewGrid.ResizerOffset = 3.5;  // half pixel because offset values are not rounded but ceiled
-
-/**
- * @unrestricted
- */
-UI.OverviewGrid.Window = class extends Common.Object {
-  /**
-   * @param {!Element} parentElement
-   * @param {!Element=} dividersLabelBarElement
-   */
-  constructor(parentElement, dividersLabelBarElement) {
-    super();
-    this._parentElement = parentElement;
-
-    UI.installDragHandle(
-        this._parentElement, this._startWindowSelectorDragging.bind(this), this._windowSelectorDragging.bind(this),
-        this._endWindowSelectorDragging.bind(this), 'text', null);
-    if (dividersLabelBarElement) {
-      UI.installDragHandle(
-          dividersLabelBarElement, this._startWindowDragging.bind(this), this._windowDragging.bind(this), null,
-          '-webkit-grabbing', '-webkit-grab');
-    }
-
-    this._parentElement.addEventListener('mousewheel', this._onMouseWheel.bind(this), true);
-    this._parentElement.addEventListener('dblclick', this._resizeWindowMaximum.bind(this), true);
-    UI.appendStyle(this._parentElement, 'ui_lazy/overviewGrid.css');
-
-    this._leftResizeElement = parentElement.createChild('div', 'overview-grid-window-resizer');
-    UI.installDragHandle(
-        this._leftResizeElement, this._resizerElementStartDragging.bind(this),
-        this._leftResizeElementDragging.bind(this), null, 'ew-resize');
-    this._rightResizeElement = parentElement.createChild('div', 'overview-grid-window-resizer');
-    UI.installDragHandle(
-        this._rightResizeElement, this._resizerElementStartDragging.bind(this),
-        this._rightResizeElementDragging.bind(this), null, 'ew-resize');
-
-    this._leftCurtainElement = parentElement.createChild('div', 'window-curtain-left');
-    this._rightCurtainElement = parentElement.createChild('div', 'window-curtain-right');
-    this.reset();
-  }
-
-  reset() {
-    this.windowLeft = 0.0;
-    this.windowRight = 1.0;
-    this.setEnabled(true);
-    this._updateCurtains();
-  }
-
-  /**
-   * @param {boolean} enabled
-   */
-  setEnabled(enabled) {
-    this._enabled = enabled;
-  }
-
-  /**
-   * @param {?function(!Event):boolean} clickHandler
-   */
-  setClickHandler(clickHandler) {
-    this._clickHandler = clickHandler;
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _resizerElementStartDragging(event) {
-    if (!this._enabled)
-      return false;
-    this._resizerParentOffsetLeft = event.pageX - event.offsetX - event.target.offsetLeft;
-    event.stopPropagation();
-    return true;
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _leftResizeElementDragging(event) {
-    this._resizeWindowLeft(event.pageX - this._resizerParentOffsetLeft);
-    event.preventDefault();
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _rightResizeElementDragging(event) {
-    this._resizeWindowRight(event.pageX - this._resizerParentOffsetLeft);
-    event.preventDefault();
-  }
-
-  /**
-   * @param {!Event} event
-   * @return {boolean}
-   */
-  _startWindowSelectorDragging(event) {
-    if (!this._enabled)
-      return false;
-    this._offsetLeft = this._parentElement.totalOffsetLeft();
-    var position = event.x - this._offsetLeft;
-    this._overviewWindowSelector = new UI.OverviewGrid.WindowSelector(this._parentElement, position);
-    return true;
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _windowSelectorDragging(event) {
-    this._overviewWindowSelector._updatePosition(event.x - this._offsetLeft);
-    event.preventDefault();
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _endWindowSelectorDragging(event) {
-    var window = this._overviewWindowSelector._close(event.x - this._offsetLeft);
-    delete this._overviewWindowSelector;
-    var clickThreshold = 3;
-    if (window.end - window.start < clickThreshold) {
-      if (this._clickHandler && this._clickHandler.call(null, event))
-        return;
-      var middle = window.end;
-      window.start = Math.max(0, middle - UI.OverviewGrid.MinSelectableSize / 2);
-      window.end = Math.min(this._parentElement.clientWidth, middle + UI.OverviewGrid.MinSelectableSize / 2);
-    } else if (window.end - window.start < UI.OverviewGrid.MinSelectableSize) {
-      if (this._parentElement.clientWidth - window.end > UI.OverviewGrid.MinSelectableSize)
-        window.end = window.start + UI.OverviewGrid.MinSelectableSize;
-      else
-        window.start = window.end - UI.OverviewGrid.MinSelectableSize;
-    }
-    this._setWindowPosition(window.start, window.end);
-  }
-
-  /**
-   * @param {!Event} event
-   * @return {boolean}
-   */
-  _startWindowDragging(event) {
-    this._dragStartPoint = event.pageX;
-    this._dragStartLeft = this.windowLeft;
-    this._dragStartRight = this.windowRight;
-    event.stopPropagation();
-    return true;
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _windowDragging(event) {
-    event.preventDefault();
-    var delta = (event.pageX - this._dragStartPoint) / this._parentElement.clientWidth;
-    if (this._dragStartLeft + delta < 0)
-      delta = -this._dragStartLeft;
-
-    if (this._dragStartRight + delta > 1)
-      delta = 1 - this._dragStartRight;
-
-    this._setWindow(this._dragStartLeft + delta, this._dragStartRight + delta);
-  }
-
-  /**
-   * @param {number} start
-   */
-  _resizeWindowLeft(start) {
-    // Glue to edge.
-    if (start < 10)
-      start = 0;
-    else if (start > this._rightResizeElement.offsetLeft - 4)
-      start = this._rightResizeElement.offsetLeft - 4;
-    this._setWindowPosition(start, null);
-  }
-
-  /**
-   * @param {number} end
-   */
-  _resizeWindowRight(end) {
-    // Glue to edge.
-    if (end > this._parentElement.clientWidth - 10)
-      end = this._parentElement.clientWidth;
-    else if (end < this._leftResizeElement.offsetLeft + UI.OverviewGrid.MinSelectableSize)
-      end = this._leftResizeElement.offsetLeft + UI.OverviewGrid.MinSelectableSize;
-    this._setWindowPosition(null, end);
-  }
-
-  _resizeWindowMaximum() {
-    this._setWindowPosition(0, this._parentElement.clientWidth);
-  }
-
-  /**
-   * @param {number} windowLeft
-   * @param {number} windowRight
-   */
-  _setWindow(windowLeft, windowRight) {
-    this.windowLeft = windowLeft;
-    this.windowRight = windowRight;
-    this._updateCurtains();
-    this.dispatchEventToListeners(UI.OverviewGrid.Events.WindowChanged);
-  }
-
-  _updateCurtains() {
-    var left = this.windowLeft;
-    var right = this.windowRight;
-    var width = right - left;
-
-    // We allow actual time window to be arbitrarily small but don't want the UI window to be too small.
-    var widthInPixels = width * this._parentElement.clientWidth;
-    var minWidthInPixels = UI.OverviewGrid.MinSelectableSize / 2;
-    if (widthInPixels < minWidthInPixels) {
-      var factor = minWidthInPixels / widthInPixels;
-      left = ((this.windowRight + this.windowLeft) - width * factor) / 2;
-      right = ((this.windowRight + this.windowLeft) + width * factor) / 2;
-    }
-    this._leftResizeElement.style.left = (100 * left).toFixed(2) + '%';
-    this._rightResizeElement.style.left = (100 * right).toFixed(2) + '%';
-
-    this._leftCurtainElement.style.width = (100 * left).toFixed(2) + '%';
-    this._rightCurtainElement.style.width = (100 * (1 - right)).toFixed(2) + '%';
-  }
-
-  /**
-   * @param {?number} start
-   * @param {?number} end
-   */
-  _setWindowPosition(start, end) {
-    var clientWidth = this._parentElement.clientWidth;
-    var windowLeft = typeof start === 'number' ? start / clientWidth : this.windowLeft;
-    var windowRight = typeof end === 'number' ? end / clientWidth : this.windowRight;
-    this._setWindow(windowLeft, windowRight);
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _onMouseWheel(event) {
-    if (!this._enabled)
-      return;
-    if (typeof event.wheelDeltaY === 'number' && event.wheelDeltaY) {
-      const zoomFactor = 1.1;
-      const mouseWheelZoomSpeed = 1 / 120;
-
-      var reference = event.offsetX / event.target.clientWidth;
-      this._zoom(Math.pow(zoomFactor, -event.wheelDeltaY * mouseWheelZoomSpeed), reference);
-    }
-    if (typeof event.wheelDeltaX === 'number' && event.wheelDeltaX) {
-      var offset = Math.round(event.wheelDeltaX * UI.OverviewGrid.WindowScrollSpeedFactor);
-      var windowLeft = this._leftResizeElement.offsetLeft + UI.OverviewGrid.ResizerOffset;
-      var windowRight = this._rightResizeElement.offsetLeft + UI.OverviewGrid.ResizerOffset;
-
-      if (windowLeft - offset < 0)
-        offset = windowLeft;
-
-      if (windowRight - offset > this._parentElement.clientWidth)
-        offset = windowRight - this._parentElement.clientWidth;
-
-      this._setWindowPosition(windowLeft - offset, windowRight - offset);
-
-      event.preventDefault();
-    }
-  }
-
-  /**
-   * @param {number} factor
-   * @param {number} reference
-   */
-  _zoom(factor, reference) {
-    var left = this.windowLeft;
-    var right = this.windowRight;
-    var windowSize = right - left;
-    var newWindowSize = factor * windowSize;
-    if (newWindowSize > 1) {
-      newWindowSize = 1;
-      factor = newWindowSize / windowSize;
-    }
-    left = reference + (left - reference) * factor;
-    left = Number.constrain(left, 0, 1 - newWindowSize);
-
-    right = reference + (right - reference) * factor;
-    right = Number.constrain(right, newWindowSize, 1);
-    this._setWindow(left, right);
-  }
-};
-
-/** @enum {symbol} */
-UI.OverviewGrid.Events = {
-  WindowChanged: Symbol('WindowChanged')
-};
-
-/**
- * @unrestricted
- */
-UI.OverviewGrid.WindowSelector = class {
-  constructor(parent, position) {
-    this._startPosition = position;
-    this._width = parent.offsetWidth;
-    this._windowSelector = createElement('div');
-    this._windowSelector.className = 'overview-grid-window-selector';
-    this._windowSelector.style.left = this._startPosition + 'px';
-    this._windowSelector.style.right = this._width - this._startPosition + 'px';
-    parent.appendChild(this._windowSelector);
-  }
-
-  _close(position) {
-    position = Math.max(0, Math.min(position, this._width));
-    this._windowSelector.remove();
-    return this._startPosition < position ? {start: this._startPosition, end: position} :
-                                            {start: position, end: this._startPosition};
-  }
-
-  _updatePosition(position) {
-    position = Math.max(0, Math.min(position, this._width));
-    if (position < this._startPosition) {
-      this._windowSelector.style.left = position + 'px';
-      this._windowSelector.style.right = this._width - this._startPosition + 'px';
-    } else {
-      this._windowSelector.style.left = this._startPosition + 'px';
-      this._windowSelector.style.right = this._width - position + 'px';
-    }
-  }
-};