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/*
* Copyright (C) 2014 Apple Inc. All rights reserved.
* Copyright (C) 2015 Devin Rousso <webkit@devinrousso.com>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
WI.GradientEditor = class GradientEditor extends WI.Object
{
constructor()
{
super();
this._element = document.createElement("div");
this._element.classList.add("gradient-editor");
this._gradient = null;
this._gradientTypes = {
"linear-gradient": {
type: WI.LinearGradient,
label: WI.UIString("Linear Gradient"),
repeats: false
},
"radial-gradient": {
type: WI.RadialGradient,
label: WI.UIString("Radial Gradient"),
repeats: false
},
"repeating-linear-gradient": {
type: WI.LinearGradient,
label: WI.UIString("Repeating Linear Gradient"),
repeats: true
},
"repeating-radial-gradient": {
type: WI.RadialGradient,
label: WI.UIString("Repeating Radial Gradient"),
repeats: true
}
};
this._editingColor = false;
this._gradientTypePicker = this._element.appendChild(document.createElement("select"));
this._gradientTypePicker.classList.add("gradient-type-select");
for (let type in this._gradientTypes) {
let option = this._gradientTypePicker.appendChild(document.createElement("option"));
option.value = type;
option.text = this._gradientTypes[type].label;
}
this._gradientTypePicker.addEventListener("change", this._gradientTypeChanged.bind(this));
this._gradientSlider = new WI.GradientSlider(this);
this._element.appendChild(this._gradientSlider.element);
this._colorPicker = new WI.ColorPicker;
this._colorPicker.colorSquare.dimension = 195;
this._colorPicker.enableColorComponentInputs = false;
this._colorPicker.addEventListener(WI.ColorPicker.Event.ColorChanged, this._colorPickerColorChanged, this);
let angleContainerElement = this._element.appendChild(document.createElement("div"));
angleContainerElement.classList.add("gradient-angle");
angleContainerElement.append(WI.UIString("Angle"));
let boundAngleValueChanged = this._angleValueChanged.bind(this);
this._angleSliderElement = angleContainerElement.appendChild(document.createElement("input"));
this._angleSliderElement.type = "range";
this._angleSliderElement.addEventListener("input", boundAngleValueChanged);
this._angleInputElement = angleContainerElement.appendChild(document.createElement("input"));
this._angleInputElement.type = "number";
this._angleInputElement.addEventListener("input", boundAngleValueChanged);
this._angleUnitsSelectElement = angleContainerElement.appendChild(document.createElement("select"));
this._angleUnitsSelectElement.addEventListener("change", this._angleUnitsChanged.bind(this));
const angleUnitsData = [
{name: WI.LinearGradient.AngleUnits.DEG, min: 0, max: 360, step: 1},
{name: WI.LinearGradient.AngleUnits.RAD, min: 0, max: 2 * Math.PI, step: 0.01},
{name: WI.LinearGradient.AngleUnits.GRAD, min: 0, max: 400, step: 1},
{name: WI.LinearGradient.AngleUnits.TURN, min: 0, max: 1, step: 0.01}
];
this._angleUnitsConfiguration = new Map(angleUnitsData.map(({name, min, max, step}) => {
let optionElement = this._angleUnitsSelectElement.appendChild(document.createElement("option"));
optionElement.value = optionElement.textContent = name;
return [name, {element: optionElement, min, max, step}];
}));
}
get element()
{
return this._element;
}
set gradient(gradient)
{
if (!gradient)
return;
const isLinear = gradient instanceof WI.LinearGradient;
const isRadial = gradient instanceof WI.RadialGradient;
console.assert(isLinear || isRadial);
if (!isLinear && !isRadial)
return;
this._gradient = gradient;
this._gradientSlider.stops = this._gradient.stops;
if (isLinear) {
this._gradientTypePicker.value = this._gradient.repeats ? "repeating-linear-gradient" : "linear-gradient";
this._angleUnitsChanged();
} else
this._gradientTypePicker.value = this._gradient.repeats ? "repeating-radial-gradient" : "radial-gradient";
this._updateCSSClassForGradientType();
}
get gradient()
{
return this._gradient;
}
// Protected
gradientSliderStopsDidChange(gradientSlider)
{
this._gradient.stops = gradientSlider.stops;
this.dispatchEventToListeners(WI.GradientEditor.Event.GradientChanged, {gradient: this._gradient});
}
gradientSliderStopWasSelected(gradientSlider, stop)
{
const selectedStop = gradientSlider.selectedStop;
if (selectedStop && !this._editingColor) {
this._element.appendChild(this._colorPicker.element);
this._element.classList.add("editing-color");
this._colorPicker.color = selectedStop.color;
this._editingColor = true;
} else if (!selectedStop) {
this._colorPicker.element.remove();
this._element.classList.remove("editing-color");
this._editingColor = false;
}
// Ensure the angle input is not focused since, if it were, it'd make a scrollbar appear as we
// animate the popover's frame to fit its new content.
this._angleInputElement.blur();
this.dispatchEventToListeners(WI.GradientEditor.Event.ColorPickerToggled);
this.dispatchEventToListeners(WI.GradientEditor.Event.GradientChanged, {gradient: this._gradient});
}
// Private
_updateCSSClassForGradientType()
{
const isRadial = this._gradient instanceof WI.RadialGradient;
this._element.classList.toggle("radial-gradient", isRadial);
this.dispatchEventToListeners(WI.GradientEditor.Event.ColorPickerToggled);
}
_gradientTypeChanged(event)
{
const descriptor = this._gradientTypes[this._gradientTypePicker.value];
if (!(this._gradient instanceof descriptor.type)) {
if (descriptor.type === WI.LinearGradient) {
this._gradient = new WI.LinearGradient({value: 180, units: WI.LinearGradient.AngleUnits.DEG}, this._gradient.stops);
this._angleUnitsChanged();
} else
this._gradient = new WI.RadialGradient("", this._gradient.stops);
this._updateCSSClassForGradientType();
}
this._gradient.repeats = descriptor.repeats;
this.dispatchEventToListeners(WI.GradientEditor.Event.GradientChanged, {gradient: this._gradient});
}
_colorPickerColorChanged(event)
{
this._gradientSlider.selectedStop.color = event.target.color;
this._gradientSlider.stops = this._gradient.stops;
this.dispatchEventToListeners(WI.GradientEditor.Event.GradientChanged, {gradient: this._gradient});
}
_angleValueChanged(event)
{
switch (event.target) {
case this._angleInputElement:
this._gradient.angleValue = this._angleSliderElement.value = parseFloat(this._angleInputElement.value) || 0;
break;
case this._angleSliderElement:
this._gradient.angleValue = this._angleInputElement.value = parseFloat(this._angleSliderElement.value) || 0;
break;
default:
WI.reportInternalError("Input event fired for disabled color component input");
return;
}
this.dispatchEventToListeners(WI.GradientEditor.Event.GradientChanged, {gradient: this._gradient});
}
_angleUnitsChanged(event)
{
let units = this._angleUnitsSelectElement.value;
let configuration = this._angleUnitsConfiguration.get(units);
if (!configuration) {
WI.reportInternalError(`Missing configuration data for selected angle units "${units}"`);
return;
}
this._gradient.angleUnits = units;
this._angleInputElement.min = this._angleSliderElement.min = configuration.min;
this._angleInputElement.max = this._angleSliderElement.max = configuration.max;
this._angleInputElement.step = this._angleSliderElement.step = configuration.step;
this._angleInputElement.value = this._angleSliderElement.value = this._gradient.angleValue;
this.dispatchEventToListeners(WI.GradientEditor.Event.GradientChanged, {gradient: this._gradient});
}
};
WI.GradientEditor.Event = {
GradientChanged: "gradient-editor-gradient-changed",
ColorPickerToggled: "gradient-editor-color-picker-toggled"
};