8914cb0153
What it looks like: http://imgur.com/U37fSkk Will only trigger if the element has a title value and also has its hasTooltip property set. Add titles to the label buttons and turn tooltips on for those. Bug: Issue 3901 Change-Id: Id02f79bcf218419ab92d8100477ced093623f4d2
111 lines
3.4 KiB
JavaScript
111 lines
3.4 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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var BOTTOM_OFFSET = 10;
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var TooltipBehavior = {
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properties: {
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hasTooltip: Boolean,
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_tooltip: Element,
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_titleText: String,
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},
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attached: function() {
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if (!this.hasTooltip) { return; }
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this.addEventListener('mouseover', this._handleShowTooltip.bind(this));
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this.addEventListener('mouseout', this._handleHideTooltip.bind(this));
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this.addEventListener('focusin', this._handleShowTooltip.bind(this));
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this.addEventListener('focusout', this._handleHideTooltip.bind(this));
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this.listen(window, 'scroll', '_handleWindowScroll');
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},
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detached: function() {
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this.unlisten(window, 'scroll', '_handleWindowScroll');
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},
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_handleShowTooltip: function(e) {
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if (!this.hasAttribute('title') || this._tooltip) { return; }
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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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var tooltip = document.createElement('gr-tooltip');
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tooltip.text = this._titleText;
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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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Polymer.dom(document.body).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: function(e) {
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if (!this.hasAttribute('title') ||
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!this._titleText ||
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this === document.activeElement) { return; }
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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: function(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: function(tooltip) {
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var offset = this._getOffset(this);
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var top = offset.top;
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var left = offset.left;
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top -= this.offsetHeight + BOTTOM_OFFSET;
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left -= (tooltip.offsetWidth / 2) - (this.offsetWidth / 2);
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left = Math.max(0, left);
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top = Math.max(0, top);
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tooltip.style.left = left + 'px';
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tooltip.style.top = top + 'px';
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},
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_getOffset: function(el) {
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var top = 0;
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var left = 0;
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for (var node = el; node; node = node.offsetParent) {
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if (node.offsetTop) { top += node.offsetTop; }
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if (node.offsetLeft) { left += node.offsetLeft; }
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}
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top += window.scrollY;
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left += window.scrollX;
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return {top: top, left: left};
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},
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};
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window.Gerrit = window.Gerrit || {};
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window.Gerrit.TooltipBehavior = TooltipBehavior;
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})(window);
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