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Side by Side Diff: polymer_1.0.4/bower_components/iron-fit-behavior/iron-fit-behavior.html

Issue 1205703007: Add polymer 1.0 to npm_modules (Closed) Base URL: https://chromium.googlesource.com/infra/third_party/npm_modules.git@master
Patch Set: Renamed folder to 1.0.4 Created 5 years, 5 months ago
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1 <!--
2 @license
3 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
4 This code may only be used under the BSD style license found at http://polymer.g ithub.io/LICENSE.txt
5 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
6 The complete set of contributors may be found at http://polymer.github.io/CONTRI BUTORS.txt
7 Code distributed by Google as part of the polymer project is also
8 subject to an additional IP rights grant found at http://polymer.github.io/PATEN TS.txt
9 -->
10
11 <link rel="import" href="../polymer/polymer.html">
12
13 <script>
14
15 /**
16 Polymer.IronFitBehavior fits an element in another element using `max-height` an d `max-width`, and
17 optionally centers it in the window or another element.
18
19 The element will only be sized and/or positioned if it has not already been size d and/or positioned
20 by CSS.
21
22 CSS properties | Action
23 -----------------------------|-------------------------------------------
24 `position` set | Element is not centered horizontally or verticall y
25 `top` or `bottom` set | Element is not vertically centered
26 `left` or `right` set | Element is not horizontally centered
27 `max-height` or `height` set | Element respects `max-height` or `height`
28 `max-width` or `width` set | Element respects `max-width` or `width`
29
30 @demo demo/index.html
31 @polymerBehavior
32 */
33
34 Polymer.IronFitBehavior = {
35
36 properties: {
37
38 /**
39 * The element that will receive a `max-height`/`width`. By default it is the same as `this`,
40 * but it can be set to a child element. This is useful, for example, for implementing a
41 * scrolling region inside the element.
42 * @type {!Element}
43 */
44 sizingTarget: {
45 type: Object,
46 value: function() {
47 return this;
48 }
49 },
50
51 /**
52 * The element to fit `this` into.
53 */
54 fitInto: {
55 type: Object,
56 value: window
57 },
58
59 /**
60 * Set to true to auto-fit on attach.
61 */
62 autoFitOnAttach: {
63 type: Boolean,
64 value: false
65 },
66
67 /** @type {?Object} */
68 _fitInfo: {
69 type: Object
70 }
71
72 },
73
74 get _fitWidth() {
75 var fitWidth;
76 if (this.fitInto === window) {
77 fitWidth = this.fitInto.innerWidth;
78 } else {
79 fitWidth = this.fitInto.getBoundingClientRect().width;
80 }
81 return fitWidth;
82 },
83
84 get _fitHeight() {
85 var fitHeight;
86 if (this.fitInto === window) {
87 fitHeight = this.fitInto.innerHeight;
88 } else {
89 fitHeight = this.fitInto.getBoundingClientRect().height;
90 }
91 return fitHeight;
92 },
93
94 attached: function() {
95 if (this.autoFitOnAttach) {
96 if (window.getComputedStyle(this).display === 'none') {
97 setTimeout(function() {
98 this.fit();
99 }.bind(this));
100 } else {
101 this.fit();
102 }
103 }
104 },
105
106 /**
107 * Fits and optionally centers the element into the window, or `fitInfo` if specified.
108 */
109 fit: function() {
110 this._discoverInfo();
111 this.constrain();
112 this.center();
113 },
114
115 /**
116 * Memoize information needed to position and size the target element.
117 */
118 _discoverInfo: function() {
119 if (this._fitInfo) {
120 return;
121 }
122 var target = window.getComputedStyle(this);
123 var sizer = window.getComputedStyle(this.sizingTarget);
124 this._fitInfo = {
125 inlineStyle: {
126 top: this.style.top || '',
127 left: this.style.left || ''
128 },
129 positionedBy: {
130 vertically: target.top !== 'auto' ? 'top' : (target.bottom !== 'auto' ?
131 'bottom' : null),
132 horizontally: target.left !== 'auto' ? 'left' : (target.right !== 'aut o' ?
133 'right' : null),
134 css: target.position
135 },
136 sizedBy: {
137 height: sizer.maxHeight !== 'none',
138 width: sizer.maxWidth !== 'none'
139 },
140 margin: {
141 top: parseInt(target.marginTop, 10) || 0,
142 right: parseInt(target.marginRight, 10) || 0,
143 bottom: parseInt(target.marginBottom, 10) || 0,
144 left: parseInt(target.marginLeft, 10) || 0
145 }
146 };
147 },
148
149 /**
150 * Resets the target element's position and size constraints, and clear
151 * the memoized data.
152 */
153 resetFit: function() {
154 if (!this._fitInfo || !this._fitInfo.sizedBy.height) {
155 this.sizingTarget.style.maxHeight = '';
156 this.style.top = this._fitInfo ? this._fitInfo.inlineStyle.top : '';
157 }
158 if (!this._fitInfo || !this._fitInfo.sizedBy.width) {
159 this.sizingTarget.style.maxWidth = '';
160 this.style.left = this._fitInfo ? this._fitInfo.inlineStyle.left : '';
161 }
162 if (this._fitInfo) {
163 this.style.position = this._fitInfo.positionedBy.css;
164 }
165 this._fitInfo = null;
166 },
167
168 /**
169 * Equivalent to calling `resetFit()` and `fit()`. Useful to call this after the element,
170 * the window, or the `fitInfo` element has been resized.
171 */
172 refit: function() {
173 this.resetFit();
174 this.fit();
175 },
176
177 /**
178 * Constrains the size of the element to the window or `fitInfo` by setting `max-height`
179 * and/or `max-width`.
180 */
181 constrain: function() {
182 var info = this._fitInfo;
183 // position at (0px, 0px) if not already positioned, so we can measure the natural size.
184 if (!this._fitInfo.positionedBy.vertically) {
185 this.style.top = '0px';
186 }
187 if (!this._fitInfo.positionedBy.horizontally) {
188 this.style.left = '0px';
189 }
190 // need border-box for margin/padding
191 this.sizingTarget.style.boxSizing = 'border-box';
192 // constrain the width and height if not already set
193 var rect = this.getBoundingClientRect();
194 if (!info.sizedBy.height) {
195 this._sizeDimension(rect, info.positionedBy.vertically, 'top', 'bottom', 'Height');
196 }
197 if (!info.sizedBy.width) {
198 this._sizeDimension(rect, info.positionedBy.horizontally, 'left', 'right ', 'Width');
199 }
200 },
201
202 _sizeDimension: function(rect, positionedBy, start, end, extent) {
203 var info = this._fitInfo;
204 var max = extent === 'Width' ? this._fitWidth : this._fitHeight;
205 var flip = (positionedBy === end);
206 var offset = flip ? max - rect[end] : rect[start];
207 var margin = info.margin[flip ? start : end];
208 var offsetExtent = 'offset' + extent;
209 var sizingOffset = this[offsetExtent] - this.sizingTarget[offsetExtent];
210 this.sizingTarget.style['max' + extent] = (max - margin - offset - sizingO ffset) + 'px';
211 },
212
213 /**
214 * Centers horizontally and vertically if not already positioned. This also sets
215 * `position:fixed`.
216 */
217 center: function() {
218 if (!this._fitInfo.positionedBy.vertically || !this._fitInfo.positionedBy. horizontally) {
219 // need position:fixed to center
220 this.style.position = 'fixed';
221 }
222 if (!this._fitInfo.positionedBy.vertically) {
223 var top = (this._fitHeight - this.offsetHeight) / 2;
224 top -= this._fitInfo.margin.top;
225 this.style.top = top + 'px';
226 }
227 if (!this._fitInfo.positionedBy.horizontally) {
228 var left = (this._fitWidth - this.offsetWidth) / 2;
229 left -= this._fitInfo.margin.left;
230 this.style.left = left + 'px';
231 }
232 }
233
234 };
235
236 </script>
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