Andrew Zambazos
393 lines
13 KiB
JavaScript
393 lines
13 KiB
JavaScript
/*
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* Copyright (C) 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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WI.BezierEditor = class BezierEditor extends WI.Object
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{
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constructor()
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{
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super();
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this._element = document.createElement("div");
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this._element.classList.add("bezier-editor");
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this._element.dir = "ltr";
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var editorWidth = 184;
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var editorHeight = 200;
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this._padding = 25;
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this._controlHandleRadius = 7;
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this._bezierWidth = editorWidth - (this._controlHandleRadius * 2);
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this._bezierHeight = editorHeight - (this._controlHandleRadius * 2) - (this._padding * 2);
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this._bezierPreviewContainer = this._element.createChild("div", "bezier-preview");
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this._bezierPreviewContainer.title = WI.UIString("Restart animation");
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this._bezierPreviewContainer.addEventListener("mousedown", this._resetPreviewAnimation.bind(this));
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this._bezierPreview = this._bezierPreviewContainer.createChild("div");
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this._bezierPreviewTiming = this._element.createChild("div", "bezier-preview-timing");
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this._bezierContainer = this._element.appendChild(createSVGElement("svg"));
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this._bezierContainer.setAttribute("width", editorWidth);
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this._bezierContainer.setAttribute("height", editorHeight);
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this._bezierContainer.classList.add("bezier-container");
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let svgGroup = this._bezierContainer.appendChild(createSVGElement("g"));
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svgGroup.setAttribute("transform", "translate(0, " + this._padding + ")");
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let linearCurve = svgGroup.appendChild(createSVGElement("line"));
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linearCurve.classList.add("linear-curve");
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linearCurve.setAttribute("x1", this._controlHandleRadius);
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linearCurve.setAttribute("y1", this._bezierHeight + this._controlHandleRadius);
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linearCurve.setAttribute("x2", this._bezierWidth + this._controlHandleRadius);
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linearCurve.setAttribute("y2", this._controlHandleRadius);
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this._bezierCurve = svgGroup.appendChild(createSVGElement("path"));
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this._bezierCurve.classList.add("bezier-curve");
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function createControl(x1, y1)
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{
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x1 += this._controlHandleRadius;
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y1 += this._controlHandleRadius;
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let line = svgGroup.appendChild(createSVGElement("line"));
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line.classList.add("control-line");
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line.setAttribute("x1", x1);
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line.setAttribute("y1", y1);
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line.setAttribute("x2", x1);
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line.setAttribute("y2", y1);
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let handle = svgGroup.appendChild(createSVGElement("circle"));
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handle.classList.add("control-handle");
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return {point: null, line, handle};
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}
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this._inControl = createControl.call(this, 0, this._bezierHeight);
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this._outControl = createControl.call(this, this._bezierWidth, 0);
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this._numberInputContainer = this._element.createChild("div", "number-input-container");
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function createBezierInput(id, {min, max} = {})
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{
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let key = "_bezier" + id + "Input";
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this[key] = this._numberInputContainer.createChild("input");
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this[key].type = "number";
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this[key].step = 0.01;
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if (!isNaN(min))
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this[key].min = min;
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if (!isNaN(max))
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this[key].max = max;
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this[key].addEventListener("input", this._handleNumberInputInput.bind(this));
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this[key].addEventListener("keydown", this._handleNumberInputKeydown.bind(this));
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}
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createBezierInput.call(this, "InX", {min: 0, max: 1});
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createBezierInput.call(this, "InY");
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createBezierInput.call(this, "OutX", {min: 0, max: 1});
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createBezierInput.call(this, "OutY");
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this._selectedControl = null;
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this._mouseDownPosition = null;
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this._bezierContainer.addEventListener("mousedown", this);
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WI.addWindowKeydownListener(this);
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}
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// Public
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get element()
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{
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return this._element;
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}
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set bezier(bezier)
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{
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if (!bezier)
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return;
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var isCubicBezier = bezier instanceof WI.CubicBezier;
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console.assert(isCubicBezier);
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if (!isCubicBezier)
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return;
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this._bezier = bezier;
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this._updateBezierPreview();
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}
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get bezier()
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{
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return this._bezier;
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}
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removeListeners()
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{
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WI.removeWindowKeydownListener(this);
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}
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// Protected
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handleEvent(event)
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{
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switch (event.type) {
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case "mousedown":
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this._handleMousedown(event);
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break;
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case "mousemove":
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this._handleMousemove(event);
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break;
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case "mouseup":
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this._handleMouseup(event);
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break;
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}
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}
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handleKeydownEvent(event)
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{
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if (!this._selectedControl || !this._element.parentNode)
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return false;
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let horizontal = 0;
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let vertical = 0;
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switch (event.keyCode) {
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case WI.KeyboardShortcut.Key.Up.keyCode:
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vertical = -1;
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break;
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case WI.KeyboardShortcut.Key.Right.keyCode:
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horizontal = 1;
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break;
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case WI.KeyboardShortcut.Key.Down.keyCode:
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vertical = 1;
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break;
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case WI.KeyboardShortcut.Key.Left.keyCode:
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horizontal = -1;
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break;
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default:
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return false;
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}
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if (event.shiftKey) {
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horizontal *= 10;
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vertical *= 10;
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}
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vertical *= this._bezierWidth / 100;
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horizontal *= this._bezierHeight / 100;
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this._selectedControl.point.x = Number.constrain(this._selectedControl.point.x + horizontal, 0, this._bezierWidth);
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this._selectedControl.point.y += vertical;
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this._updateControl(this._selectedControl);
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this._updateValue();
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return true;
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}
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// Private
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_handleMousedown(event)
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{
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if (event.button !== 0)
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return;
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event.stop();
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window.addEventListener("mousemove", this, true);
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window.addEventListener("mouseup", this, true);
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this._bezierPreviewContainer.classList.remove("animate");
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this._bezierPreviewTiming.classList.remove("animate");
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this._updateControlPointsForMouseEvent(event, true);
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}
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_handleMousemove(event)
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{
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this._updateControlPointsForMouseEvent(event);
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}
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_handleMouseup(event)
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{
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this._selectedControl.handle.classList.remove("selected");
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this._mouseDownPosition = null;
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this._triggerPreviewAnimation();
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window.removeEventListener("mousemove", this, true);
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window.removeEventListener("mouseup", this, true);
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}
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_updateControlPointsForMouseEvent(event, calculateSelectedControlPoint)
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{
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var point = WI.Point.fromEventInElement(event, this._bezierContainer);
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point.x = Number.constrain(point.x - this._controlHandleRadius, 0, this._bezierWidth);
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point.y -= this._controlHandleRadius + this._padding;
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if (calculateSelectedControlPoint) {
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this._mouseDownPosition = point;
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if (this._inControl.point.distance(point) < this._outControl.point.distance(point))
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this._selectedControl = this._inControl;
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else
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this._selectedControl = this._outControl;
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}
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if (event.shiftKey && this._mouseDownPosition) {
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if (Math.abs(this._mouseDownPosition.x - point.x) > Math.abs(this._mouseDownPosition.y - point.y))
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point.y = this._mouseDownPosition.y;
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else
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point.x = this._mouseDownPosition.x;
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}
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this._selectedControl.point = point;
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this._selectedControl.handle.classList.add("selected");
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this._updateValue();
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}
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_updateValue()
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{
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function round(num)
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{
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return Math.round(num * 100) / 100;
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}
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var inValueX = round(this._inControl.point.x / this._bezierWidth);
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var inValueY = round(1 - (this._inControl.point.y / this._bezierHeight));
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var outValueX = round(this._outControl.point.x / this._bezierWidth);
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var outValueY = round(1 - (this._outControl.point.y / this._bezierHeight));
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this._bezier = new WI.CubicBezier(inValueX, inValueY, outValueX, outValueY);
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this._updateBezier();
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this.dispatchEventToListeners(WI.BezierEditor.Event.BezierChanged, {bezier: this._bezier});
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}
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_updateBezier()
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{
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var r = this._controlHandleRadius;
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var inControlX = this._inControl.point.x + r;
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var inControlY = this._inControl.point.y + r;
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var outControlX = this._outControl.point.x + r;
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var outControlY = this._outControl.point.y + r;
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var path = `M ${r} ${this._bezierHeight + r} C ${inControlX} ${inControlY} ${outControlX} ${outControlY} ${this._bezierWidth + r} ${r}`;
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this._bezierCurve.setAttribute("d", path);
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this._updateControl(this._inControl);
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this._updateControl(this._outControl);
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this._bezierInXInput.value = this._bezier.inPoint.x;
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this._bezierInYInput.value = this._bezier.inPoint.y;
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this._bezierOutXInput.value = this._bezier.outPoint.x;
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this._bezierOutYInput.value = this._bezier.outPoint.y;
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}
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_updateControl(control)
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{
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control.handle.setAttribute("cx", control.point.x + this._controlHandleRadius);
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control.handle.setAttribute("cy", control.point.y + this._controlHandleRadius);
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control.line.setAttribute("x2", control.point.x + this._controlHandleRadius);
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control.line.setAttribute("y2", control.point.y + this._controlHandleRadius);
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}
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_updateBezierPreview()
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{
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this._inControl.point = new WI.Point(this._bezier.inPoint.x * this._bezierWidth, (1 - this._bezier.inPoint.y) * this._bezierHeight);
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this._outControl.point = new WI.Point(this._bezier.outPoint.x * this._bezierWidth, (1 - this._bezier.outPoint.y) * this._bezierHeight);
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this._updateBezier();
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this._triggerPreviewAnimation();
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}
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_triggerPreviewAnimation()
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{
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this._bezierPreview.style.animationTimingFunction = this._bezier.toString();
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this._bezierPreviewContainer.classList.add("animate");
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this._bezierPreviewTiming.classList.add("animate");
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}
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_resetPreviewAnimation()
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{
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var parent = this._bezierPreview.parentNode;
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parent.removeChild(this._bezierPreview);
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parent.appendChild(this._bezierPreview);
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this._element.removeChild(this._bezierPreviewTiming);
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this._element.appendChild(this._bezierPreviewTiming);
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}
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_handleNumberInputInput(event)
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{
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this._changeBezierForInput(event.target, event.target.value);
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}
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_handleNumberInputKeydown(event)
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{
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let shift = 0;
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if (event.keyIdentifier === "Up")
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shift = 0.01;
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else if (event.keyIdentifier === "Down")
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shift = -0.01;
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if (!shift)
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return;
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if (event.shiftKey)
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shift *= 10;
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event.preventDefault();
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this._changeBezierForInput(event.target, parseFloat(event.target.value) + shift);
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}
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_changeBezierForInput(target, value)
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{
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value = Math.round(value * 100) / 100;
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switch (target) {
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case this._bezierInXInput:
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this._bezier.inPoint.x = Number.constrain(value, 0, 1);
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break;
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case this._bezierInYInput:
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this._bezier.inPoint.y = value;
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break;
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case this._bezierOutXInput:
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this._bezier.outPoint.x = Number.constrain(value, 0, 1);
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break;
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case this._bezierOutYInput:
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this._bezier.outPoint.y = value;
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break;
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default:
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return;
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}
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this._updateBezierPreview();
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this.dispatchEventToListeners(WI.BezierEditor.Event.BezierChanged, {bezier: this._bezier});
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}
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};
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WI.BezierEditor.Event = {
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BezierChanged: "bezier-editor-bezier-changed"
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};
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