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META-INF.dirigible.dev-tools.inline_editor.CSSShadowEditor.js Maven / Gradle / Ivy
// Copyright 2016 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.
import * as Common from '../common/common.js';
import * as Platform from '../platform/platform.js';
import * as UI from '../ui/ui.js';
import {CSSLength, CSSShadowModel} from './CSSShadowModel.js'; // eslint-disable-line no-unused-vars
/** @type {number} */
const maxRange = 20;
/** @type {string} */
const defaultUnit = 'px';
/** @type {number} */
const sliderThumbRadius = 6;
/** @type {number} */
const canvasSize = 88;
/**
* @unrestricted
*/
export class CSSShadowEditor extends UI.Widget.VBox {
constructor() {
super(true);
this.registerRequiredCSS('inline_editor/cssShadowEditor.css');
this.contentElement.tabIndex = 0;
this.setDefaultFocusedElement(this.contentElement);
this._typeField = this.contentElement.createChild('div', 'shadow-editor-field shadow-editor-flex-field');
this._typeField.createChild('label', 'shadow-editor-label').textContent = Common.UIString.UIString('Type');
this._outsetButton = this._typeField.createChild('button', 'shadow-editor-button-left');
this._outsetButton.textContent = Common.UIString.UIString('Outset');
this._outsetButton.addEventListener('click', this._onButtonClick.bind(this), false);
this._insetButton = this._typeField.createChild('button', 'shadow-editor-button-right');
this._insetButton.textContent = Common.UIString.UIString('Inset');
this._insetButton.addEventListener('click', this._onButtonClick.bind(this), false);
const xField = this.contentElement.createChild('div', 'shadow-editor-field');
this._xInput = this._createTextInput(xField, Common.UIString.UIString('X offset'));
const yField = this.contentElement.createChild('div', 'shadow-editor-field');
this._yInput = this._createTextInput(yField, Common.UIString.UIString('Y offset'));
this._xySlider = xField.createChild('canvas', 'shadow-editor-2D-slider');
this._xySlider.width = canvasSize;
this._xySlider.height = canvasSize;
this._xySlider.tabIndex = -1;
this._halfCanvasSize = canvasSize / 2;
this._innerCanvasSize = this._halfCanvasSize - sliderThumbRadius;
UI.UIUtils.installDragHandle(
this._xySlider, this._dragStart.bind(this), this._dragMove.bind(this), null, 'default');
this._xySlider.addEventListener('keydown', this._onCanvasArrowKey.bind(this), false);
this._xySlider.addEventListener('blur', this._onCanvasBlur.bind(this), false);
const blurField =
this.contentElement.createChild('div', 'shadow-editor-field shadow-editor-flex-field shadow-editor-blur-field');
this._blurInput = this._createTextInput(blurField, Common.UIString.UIString('Blur'));
this._blurSlider = this._createSlider(blurField);
this._spreadField = this.contentElement.createChild('div', 'shadow-editor-field shadow-editor-flex-field');
this._spreadInput = this._createTextInput(this._spreadField, Common.UIString.UIString('Spread'));
this._spreadSlider = this._createSlider(this._spreadField);
}
/**
* @param {!Element} field
* @param {string} propertyName
* @return {!Element}
*/
_createTextInput(field, propertyName) {
const label = field.createChild('label', 'shadow-editor-label');
label.textContent = propertyName;
label.setAttribute('for', propertyName);
const textInput = UI.UIUtils.createInput('shadow-editor-text-input', 'text');
field.appendChild(textInput);
textInput.id = propertyName;
textInput.addEventListener('keydown', this._handleValueModification.bind(this), false);
textInput.addEventListener('mousewheel', this._handleValueModification.bind(this), false);
textInput.addEventListener('input', this._onTextInput.bind(this), false);
textInput.addEventListener('blur', this._onTextBlur.bind(this), false);
return textInput;
}
/**
* @param {!Element} field
* @return {!Element}
*/
_createSlider(field) {
const slider = UI.UIUtils.createSlider(0, maxRange, -1);
slider.addEventListener('input', this._onSliderInput.bind(this), false);
field.appendChild(slider);
return slider;
}
/**
* @override
*/
wasShown() {
this._updateUI();
}
/**
* @param {!CSSShadowModel} model
*/
setModel(model) {
this._model = model;
this._typeField.classList.toggle('hidden', !model.isBoxShadow());
this._spreadField.classList.toggle('hidden', !model.isBoxShadow());
this._updateUI();
}
_updateUI() {
this._updateButtons();
this._xInput.value = this._model.offsetX().asCSSText();
this._yInput.value = this._model.offsetY().asCSSText();
this._blurInput.value = this._model.blurRadius().asCSSText();
this._spreadInput.value = this._model.spreadRadius().asCSSText();
this._blurSlider.value = this._model.blurRadius().amount;
this._spreadSlider.value = this._model.spreadRadius().amount;
this._updateCanvas(false);
}
_updateButtons() {
this._insetButton.classList.toggle('enabled', this._model.inset());
this._outsetButton.classList.toggle('enabled', !this._model.inset());
}
/**
* @param {boolean} drawFocus
*/
_updateCanvas(drawFocus) {
const context = this._xySlider.getContext('2d');
context.clearRect(0, 0, this._xySlider.width, this._xySlider.height);
// Draw dashed axes.
context.save();
context.setLineDash([1, 1]);
context.strokeStyle = 'rgba(210, 210, 210, 0.8)';
context.beginPath();
context.moveTo(this._halfCanvasSize, 0);
context.lineTo(this._halfCanvasSize, canvasSize);
context.moveTo(0, this._halfCanvasSize);
context.lineTo(canvasSize, this._halfCanvasSize);
context.stroke();
context.restore();
const thumbPoint = this._sliderThumbPosition();
// Draw 2D slider line.
context.save();
context.translate(this._halfCanvasSize, this._halfCanvasSize);
context.lineWidth = 2;
context.strokeStyle = 'rgba(130, 130, 130, 0.75)';
context.beginPath();
context.moveTo(0, 0);
context.lineTo(thumbPoint.x, thumbPoint.y);
context.stroke();
// Draw 2D slider thumb.
if (drawFocus) {
context.beginPath();
context.fillStyle = 'rgba(66, 133, 244, 0.4)';
context.arc(thumbPoint.x, thumbPoint.y, sliderThumbRadius + 2, 0, 2 * Math.PI);
context.fill();
}
context.beginPath();
context.fillStyle = '#4285F4';
context.arc(thumbPoint.x, thumbPoint.y, sliderThumbRadius, 0, 2 * Math.PI);
context.fill();
context.restore();
}
/**
* @param {!Event} event
*/
_onButtonClick(event) {
const insetClicked = (event.currentTarget === this._insetButton);
if (insetClicked && this._model.inset() || !insetClicked && !this._model.inset()) {
return;
}
this._model.setInset(insetClicked);
this._updateButtons();
this.dispatchEventToListeners(Events.ShadowChanged, this._model);
}
/**
* @param {!Event} event
*/
_handleValueModification(event) {
const modifiedValue = UI.UIUtils.createReplacementString(event.currentTarget.value, event, customNumberHandler);
if (!modifiedValue) {
return;
}
const length = CSSLength.parse(modifiedValue);
if (!length) {
return;
}
if (event.currentTarget === this._blurInput && length.amount < 0) {
length.amount = 0;
}
event.currentTarget.value = length.asCSSText();
event.currentTarget.selectionStart = 0;
event.currentTarget.selectionEnd = event.currentTarget.value.length;
this._onTextInput(event);
event.consume(true);
/**
* @param {string} prefix
* @param {number} number
* @param {string} suffix
* @return {string}
*/
function customNumberHandler(prefix, number, suffix) {
if (!suffix.length) {
suffix = defaultUnit;
}
return prefix + number + suffix;
}
}
/**
* @param {!Event} event
*/
_onTextInput(event) {
this._changedElement = event.currentTarget;
this._changedElement.classList.remove('invalid');
const length = CSSLength.parse(event.currentTarget.value);
if (!length || event.currentTarget === this._blurInput && length.amount < 0) {
return;
}
if (event.currentTarget === this._xInput) {
this._model.setOffsetX(length);
this._updateCanvas(false);
} else if (event.currentTarget === this._yInput) {
this._model.setOffsetY(length);
this._updateCanvas(false);
} else if (event.currentTarget === this._blurInput) {
this._model.setBlurRadius(length);
this._blurSlider.value = length.amount;
} else if (event.currentTarget === this._spreadInput) {
this._model.setSpreadRadius(length);
this._spreadSlider.value = length.amount;
}
this.dispatchEventToListeners(Events.ShadowChanged, this._model);
}
_onTextBlur() {
if (!this._changedElement) {
return;
}
let length = !this._changedElement.value.trim() ? CSSLength.zero() : CSSLength.parse(this._changedElement.value);
if (!length) {
length = CSSLength.parse(this._changedElement.value + defaultUnit);
}
if (!length) {
this._changedElement.classList.add('invalid');
this._changedElement = null;
return;
}
if (this._changedElement === this._xInput) {
this._model.setOffsetX(length);
this._xInput.value = length.asCSSText();
this._updateCanvas(false);
} else if (this._changedElement === this._yInput) {
this._model.setOffsetY(length);
this._yInput.value = length.asCSSText();
this._updateCanvas(false);
} else if (this._changedElement === this._blurInput) {
if (length.amount < 0) {
length = CSSLength.zero();
}
this._model.setBlurRadius(length);
this._blurInput.value = length.asCSSText();
this._blurSlider.value = length.amount;
} else if (this._changedElement === this._spreadInput) {
this._model.setSpreadRadius(length);
this._spreadInput.value = length.asCSSText();
this._spreadSlider.value = length.amount;
}
this._changedElement = null;
this.dispatchEventToListeners(Events.ShadowChanged, this._model);
}
/**
* @param {!Event} event
*/
_onSliderInput(event) {
if (event.currentTarget === this._blurSlider) {
this._model.setBlurRadius(new CSSLength(this._blurSlider.value, this._model.blurRadius().unit || defaultUnit));
this._blurInput.value = this._model.blurRadius().asCSSText();
this._blurInput.classList.remove('invalid');
} else if (event.currentTarget === this._spreadSlider) {
this._model.setSpreadRadius(
new CSSLength(this._spreadSlider.value, this._model.spreadRadius().unit || defaultUnit));
this._spreadInput.value = this._model.spreadRadius().asCSSText();
this._spreadInput.classList.remove('invalid');
}
this.dispatchEventToListeners(Events.ShadowChanged, this._model);
}
/**
* @param {!MouseEvent} event
* @return {boolean}
*/
_dragStart(event) {
this._xySlider.focus();
this._updateCanvas(true);
this._canvasOrigin = new UI.Geometry.Point(
this._xySlider.totalOffsetLeft() + this._halfCanvasSize,
this._xySlider.totalOffsetTop() + this._halfCanvasSize);
const clickedPoint = new UI.Geometry.Point(event.x - this._canvasOrigin.x, event.y - this._canvasOrigin.y);
const thumbPoint = this._sliderThumbPosition();
if (clickedPoint.distanceTo(thumbPoint) >= sliderThumbRadius) {
this._dragMove(event);
}
return true;
}
/**
* @param {!MouseEvent} event
*/
_dragMove(event) {
let point = new UI.Geometry.Point(event.x - this._canvasOrigin.x, event.y - this._canvasOrigin.y);
if (event.shiftKey) {
point = this._snapToClosestDirection(point);
}
const constrainedPoint = this._constrainPoint(point, this._innerCanvasSize);
const newX = Math.round((constrainedPoint.x / this._innerCanvasSize) * maxRange);
const newY = Math.round((constrainedPoint.y / this._innerCanvasSize) * maxRange);
if (event.shiftKey) {
this._model.setOffsetX(new CSSLength(newX, this._model.offsetX().unit || defaultUnit));
this._model.setOffsetY(new CSSLength(newY, this._model.offsetY().unit || defaultUnit));
} else {
if (!event.altKey) {
this._model.setOffsetX(new CSSLength(newX, this._model.offsetX().unit || defaultUnit));
}
if (!UI.KeyboardShortcut.KeyboardShortcut.eventHasCtrlOrMeta(event)) {
this._model.setOffsetY(new CSSLength(newY, this._model.offsetY().unit || defaultUnit));
}
}
this._xInput.value = this._model.offsetX().asCSSText();
this._yInput.value = this._model.offsetY().asCSSText();
this._xInput.classList.remove('invalid');
this._yInput.classList.remove('invalid');
this._updateCanvas(true);
this.dispatchEventToListeners(Events.ShadowChanged, this._model);
}
_onCanvasBlur() {
this._updateCanvas(false);
}
/**
* @param {!Event} event
*/
_onCanvasArrowKey(event) {
let shiftX = 0;
let shiftY = 0;
if (event.key === 'ArrowRight') {
shiftX = 1;
} else if (event.key === 'ArrowLeft') {
shiftX = -1;
} else if (event.key === 'ArrowUp') {
shiftY = -1;
} else if (event.key === 'ArrowDown') {
shiftY = 1;
}
if (!shiftX && !shiftY) {
return;
}
event.consume(true);
if (shiftX) {
const offsetX = this._model.offsetX();
const newAmount = Platform.NumberUtilities.clamp(offsetX.amount + shiftX, -maxRange, maxRange);
if (newAmount === offsetX.amount) {
return;
}
this._model.setOffsetX(new CSSLength(newAmount, offsetX.unit || defaultUnit));
this._xInput.value = this._model.offsetX().asCSSText();
this._xInput.classList.remove('invalid');
}
if (shiftY) {
const offsetY = this._model.offsetY();
const newAmount = Platform.NumberUtilities.clamp(offsetY.amount + shiftY, -maxRange, maxRange);
if (newAmount === offsetY.amount) {
return;
}
this._model.setOffsetY(new CSSLength(newAmount, offsetY.unit || defaultUnit));
this._yInput.value = this._model.offsetY().asCSSText();
this._yInput.classList.remove('invalid');
}
this._updateCanvas(true);
this.dispatchEventToListeners(Events.ShadowChanged, this._model);
}
/**
* @param {!UI.Geometry.Point} point
* @param {number} max
* @return {!UI.Geometry.Point}
*/
_constrainPoint(point, max) {
if (Math.abs(point.x) <= max && Math.abs(point.y) <= max) {
return new UI.Geometry.Point(point.x, point.y);
}
return point.scale(max / Math.max(Math.abs(point.x), Math.abs(point.y)));
}
/**
* @param {!UI.Geometry.Point} point
* @return {!UI.Geometry.Point}
*/
_snapToClosestDirection(point) {
let minDistance = Number.MAX_VALUE;
let closestPoint = point;
const directions = [
new UI.Geometry.Point(0, -1), // North
new UI.Geometry.Point(1, -1), // Northeast
new UI.Geometry.Point(1, 0), // East
new UI.Geometry.Point(1, 1) // Southeast
];
for (const direction of directions) {
const projection = point.projectOn(direction);
const distance = point.distanceTo(projection);
if (distance < minDistance) {
minDistance = distance;
closestPoint = projection;
}
}
return closestPoint;
}
/**
* @return {!UI.Geometry.Point}
*/
_sliderThumbPosition() {
const x = (this._model.offsetX().amount / maxRange) * this._innerCanvasSize;
const y = (this._model.offsetY().amount / maxRange) * this._innerCanvasSize;
return this._constrainPoint(new UI.Geometry.Point(x, y), this._innerCanvasSize);
}
}
/** @enum {symbol} */
export const Events = {
ShadowChanged: Symbol('ShadowChanged')
};
