@dcloudio/uni-debugger
Version:
uni-app debugger
320 lines (283 loc) • 9.35 kB
JavaScript
/*
* Copyright 2014 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/**
* @unrestricted
*/
LayerViewer.TransformController = class extends Common.Object {
/**
* @param {!Element} element
* @param {boolean=} disableRotate
*/
constructor(element, disableRotate) {
super();
this._shortcuts = {};
this.element = element;
if (this.element.tabIndex < 0)
this.element.tabIndex = 0;
this._registerShortcuts();
UI.installDragHandle(
element, this._onDragStart.bind(this), this._onDrag.bind(this), this._onDragEnd.bind(this), 'move', null);
element.addEventListener('keydown', this._onKeyDown.bind(this), false);
element.addEventListener('keyup', this._onKeyUp.bind(this), false);
element.addEventListener('mousewheel', this._onMouseWheel.bind(this), false);
this._minScale = 0;
this._maxScale = Infinity;
this._controlPanelToolbar = new UI.Toolbar('transform-control-panel');
/** @type {!Object<string, !UI.ToolbarToggle>} */
this._modeButtons = {};
if (!disableRotate) {
const panModeButton = new UI.ToolbarToggle(Common.UIString('Pan mode (X)'), 'largeicon-pan');
panModeButton.addEventListener(
UI.ToolbarButton.Events.Click, this._setMode.bind(this, LayerViewer.TransformController.Modes.Pan));
this._modeButtons[LayerViewer.TransformController.Modes.Pan] = panModeButton;
this._controlPanelToolbar.appendToolbarItem(panModeButton);
const rotateModeButton = new UI.ToolbarToggle(Common.UIString('Rotate mode (V)'), 'largeicon-rotate');
rotateModeButton.addEventListener(
UI.ToolbarButton.Events.Click, this._setMode.bind(this, LayerViewer.TransformController.Modes.Rotate));
this._modeButtons[LayerViewer.TransformController.Modes.Rotate] = rotateModeButton;
this._controlPanelToolbar.appendToolbarItem(rotateModeButton);
}
this._setMode(LayerViewer.TransformController.Modes.Pan);
const resetButton = new UI.ToolbarButton(Common.UIString('Reset transform (0)'), 'largeicon-center');
resetButton.addEventListener(UI.ToolbarButton.Events.Click, this.resetAndNotify.bind(this, undefined));
this._controlPanelToolbar.appendToolbarItem(resetButton);
this._reset();
}
/**
* @return {!UI.Toolbar}
*/
toolbar() {
return this._controlPanelToolbar;
}
_onKeyDown(event) {
if (event.keyCode === UI.KeyboardShortcut.Keys.Shift.code) {
this._toggleMode();
return;
}
const shortcutKey = UI.KeyboardShortcut.makeKeyFromEventIgnoringModifiers(event);
const handler = this._shortcuts[shortcutKey];
if (handler && handler(event))
event.consume();
}
_onKeyUp(event) {
if (event.keyCode === UI.KeyboardShortcut.Keys.Shift.code)
this._toggleMode();
}
_addShortcuts(keys, handler) {
for (let i = 0; i < keys.length; ++i)
this._shortcuts[keys[i].key] = handler;
}
_registerShortcuts() {
this._addShortcuts(UI.ShortcutsScreen.LayersPanelShortcuts.ResetView, this.resetAndNotify.bind(this));
this._addShortcuts(
UI.ShortcutsScreen.LayersPanelShortcuts.PanMode,
this._setMode.bind(this, LayerViewer.TransformController.Modes.Pan));
this._addShortcuts(
UI.ShortcutsScreen.LayersPanelShortcuts.RotateMode,
this._setMode.bind(this, LayerViewer.TransformController.Modes.Rotate));
const zoomFactor = 1.1;
this._addShortcuts(UI.ShortcutsScreen.LayersPanelShortcuts.ZoomIn, this._onKeyboardZoom.bind(this, zoomFactor));
this._addShortcuts(
UI.ShortcutsScreen.LayersPanelShortcuts.ZoomOut, this._onKeyboardZoom.bind(this, 1 / zoomFactor));
this._addShortcuts(UI.ShortcutsScreen.LayersPanelShortcuts.Up, this._onKeyboardPanOrRotate.bind(this, 0, -1));
this._addShortcuts(UI.ShortcutsScreen.LayersPanelShortcuts.Down, this._onKeyboardPanOrRotate.bind(this, 0, 1));
this._addShortcuts(UI.ShortcutsScreen.LayersPanelShortcuts.Left, this._onKeyboardPanOrRotate.bind(this, -1, 0));
this._addShortcuts(UI.ShortcutsScreen.LayersPanelShortcuts.Right, this._onKeyboardPanOrRotate.bind(this, 1, 0));
}
_postChangeEvent() {
this.dispatchEventToListeners(LayerViewer.TransformController.Events.TransformChanged);
}
_reset() {
this._scale = 1;
this._offsetX = 0;
this._offsetY = 0;
this._rotateX = 0;
this._rotateY = 0;
}
_toggleMode() {
this._setMode(
this._mode === LayerViewer.TransformController.Modes.Pan ? LayerViewer.TransformController.Modes.Rotate :
LayerViewer.TransformController.Modes.Pan);
}
/**
* @param {!LayerViewer.TransformController.Modes} mode
*/
_setMode(mode) {
if (this._mode === mode)
return;
this._mode = mode;
this._updateModeButtons();
this.element.focus();
}
_updateModeButtons() {
for (const mode in this._modeButtons)
this._modeButtons[mode].setToggled(mode === this._mode);
}
/**
* @param {!Event=} event
*/
resetAndNotify(event) {
this._reset();
this._postChangeEvent();
if (event)
event.preventDefault();
this.element.focus();
}
/**
* @param {number} minScale
* @param {number} maxScale
*/
setScaleConstraints(minScale, maxScale) {
this._minScale = minScale;
this._maxScale = maxScale;
this._scale = Number.constrain(this._scale, minScale, maxScale);
}
/**
* @param {number} minX
* @param {number} maxX
* @param {number} minY
* @param {number} maxY
*/
clampOffsets(minX, maxX, minY, maxY) {
this._offsetX = Number.constrain(this._offsetX, minX, maxX);
this._offsetY = Number.constrain(this._offsetY, minY, maxY);
}
/**
* @return {number}
*/
scale() {
return this._scale;
}
/**
* @return {number}
*/
offsetX() {
return this._offsetX;
}
/**
* @return {number}
*/
offsetY() {
return this._offsetY;
}
/**
* @return {number}
*/
rotateX() {
return this._rotateX;
}
/**
* @return {number}
*/
rotateY() {
return this._rotateY;
}
/**
* @param {number} scaleFactor
* @param {number} x
* @param {number} y
*/
_onScale(scaleFactor, x, y) {
scaleFactor = Number.constrain(this._scale * scaleFactor, this._minScale, this._maxScale) / this._scale;
this._scale *= scaleFactor;
this._offsetX -= (x - this._offsetX) * (scaleFactor - 1);
this._offsetY -= (y - this._offsetY) * (scaleFactor - 1);
this._postChangeEvent();
}
/**
* @param {number} offsetX
* @param {number} offsetY
*/
_onPan(offsetX, offsetY) {
this._offsetX += offsetX;
this._offsetY += offsetY;
this._postChangeEvent();
}
/**
* @param {number} rotateX
* @param {number} rotateY
*/
_onRotate(rotateX, rotateY) {
this._rotateX = rotateX;
this._rotateY = rotateY;
this._postChangeEvent();
}
/**
* @param {number} zoomFactor
*/
_onKeyboardZoom(zoomFactor) {
this._onScale(zoomFactor, this.element.clientWidth / 2, this.element.clientHeight / 2);
}
/**
* @param {number} xMultiplier
* @param {number} yMultiplier
*/
_onKeyboardPanOrRotate(xMultiplier, yMultiplier) {
const panStepInPixels = 6;
const rotateStepInDegrees = 5;
if (this._mode === LayerViewer.TransformController.Modes.Rotate) {
// Sic! _onRotate treats X and Y as "rotate around X" and "rotate around Y", so swap X/Y multiplers.
this._onRotate(
this._rotateX + yMultiplier * rotateStepInDegrees, this._rotateY + xMultiplier * rotateStepInDegrees);
} else {
this._onPan(xMultiplier * panStepInPixels, yMultiplier * panStepInPixels);
}
}
/**
* @param {!Event} event
*/
_onMouseWheel(event) {
/** @const */
const zoomFactor = 1.1;
/** @const */
const mouseWheelZoomSpeed = 1 / 120;
const scaleFactor = Math.pow(zoomFactor, event.wheelDeltaY * mouseWheelZoomSpeed);
this._onScale(
scaleFactor, event.clientX - this.element.totalOffsetLeft(), event.clientY - this.element.totalOffsetTop());
}
/**
* @param {!Event} event
*/
_onDrag(event) {
if (this._mode === LayerViewer.TransformController.Modes.Rotate) {
this._onRotate(
this._oldRotateX + (this._originY - event.clientY) / this.element.clientHeight * 180,
this._oldRotateY - (this._originX - event.clientX) / this.element.clientWidth * 180);
} else {
this._onPan(event.clientX - this._originX, event.clientY - this._originY);
this._originX = event.clientX;
this._originY = event.clientY;
}
}
/**
* @param {!MouseEvent} event
*/
_onDragStart(event) {
this.element.focus();
this._originX = event.clientX;
this._originY = event.clientY;
this._oldRotateX = this._rotateX;
this._oldRotateY = this._rotateY;
return true;
}
_onDragEnd() {
delete this._originX;
delete this._originY;
delete this._oldRotateX;
delete this._oldRotateY;
}
};
/** @enum {symbol} */
LayerViewer.TransformController.Events = {
TransformChanged: Symbol('TransformChanged')
};
/**
* @enum {string}
*/
LayerViewer.TransformController.Modes = {
Pan: 'Pan',
Rotate: 'Rotate',
};