131 lines
4.0 KiB
JavaScript
131 lines
4.0 KiB
JavaScript
// Copyright (C) 2016 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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(function(window) {
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'use strict';
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const BOTTOM_OFFSET = 7.2; // Height of the arrow in tooltip.
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window.Gerrit = window.Gerrit || {};
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/** @polymerBehavior Gerrit.TooltipBehavior */
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Gerrit.TooltipBehavior = {
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properties: {
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hasTooltip: {
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type: Boolean,
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observer: '_setupTooltipListeners',
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},
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_isTouchDevice: {
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type: Boolean,
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value() {
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return 'ontouchstart' in document.documentElement;
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},
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},
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_tooltip: Object,
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_titleText: String,
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_hasSetupTooltipListeners: {
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type: Boolean,
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value: false,
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},
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},
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detached() {
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this._handleHideTooltip();
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this.unlisten(window, 'scroll', '_handleWindowScroll');
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},
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_setupTooltipListeners() {
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if (this._hasSetupTooltipListeners || !this.hasTooltip) { return; }
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this._hasSetupTooltipListeners = true;
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this.addEventListener('mouseenter', this._handleShowTooltip.bind(this));
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this.addEventListener('mouseleave', this._handleHideTooltip.bind(this));
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this.addEventListener('tap', this._handleHideTooltip.bind(this));
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this.listen(window, 'scroll', '_handleWindowScroll');
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},
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_handleShowTooltip(e) {
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if (this._isTouchDevice) { return; }
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if (!this.hasAttribute('title') ||
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this.getAttribute('title') === '' ||
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this._tooltip) {
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return;
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}
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// Store the title attribute text then set it to an empty string to
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// prevent it from showing natively.
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this._titleText = this.getAttribute('title');
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this.setAttribute('title', '');
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const tooltip = document.createElement('gr-tooltip');
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tooltip.text = this._titleText;
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tooltip.maxWidth = this.getAttribute('max-width');
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// Set visibility to hidden before appending to the DOM so that
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// calculations can be made based on the element’s size.
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tooltip.style.visibility = 'hidden';
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Gerrit.getRootElement().appendChild(tooltip);
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this._positionTooltip(tooltip);
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tooltip.style.visibility = null;
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this._tooltip = tooltip;
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},
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_handleHideTooltip(e) {
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if (this._isTouchDevice) { return; }
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if (!this.hasAttribute('title') ||
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this._titleText == null) {
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return;
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}
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this.setAttribute('title', this._titleText);
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if (this._tooltip && this._tooltip.parentNode) {
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this._tooltip.parentNode.removeChild(this._tooltip);
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}
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this._tooltip = null;
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},
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_handleWindowScroll(e) {
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if (!this._tooltip) { return; }
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this._positionTooltip(this._tooltip);
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},
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_positionTooltip(tooltip) {
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const rect = this.getBoundingClientRect();
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const boxRect = tooltip.getBoundingClientRect();
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const parentRect = tooltip.parentElement.getBoundingClientRect();
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const top = rect.top - parentRect.top;
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const left =
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rect.left - parentRect.left + (rect.width - boxRect.width) / 2;
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const right = parentRect.width - left - boxRect.width;
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if (left < 0) {
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tooltip.updateStyles({
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'--gr-tooltip-arrow-center-offset': left + 'px',
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});
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} else if (right < 0) {
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tooltip.updateStyles({
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'--gr-tooltip-arrow-center-offset': (-0.5 * right) + 'px',
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});
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}
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tooltip.style.left = Math.max(0, left) + 'px';
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tooltip.style.top = Math.max(0, top) + 'px';
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tooltip.style.transform = 'translateY(calc(-100% - ' + BOTTOM_OFFSET +
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'px))';
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},
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};
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})(window);
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