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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 Polymer.IronOverlayManager = (function() { | |
| 16 | |
| 17 var overlays = []; | |
| 18 var DEFAULT_Z = 10; | |
| 19 var backdrops = []; | |
| 20 | |
| 21 // track overlays for z-index and focus managemant | |
| 22 function addOverlay(overlay) { | |
| 23 var z0 = currentOverlayZ(); | |
| 24 overlays.push(overlay); | |
| 25 var z1 = currentOverlayZ(); | |
| 26 if (z1 <= z0) { | |
| 27 applyOverlayZ(overlay, z0); | |
| 28 } | |
| 29 } | |
| 30 | |
| 31 function removeOverlay(overlay) { | |
| 32 var i = overlays.indexOf(overlay); | |
| 33 if (i >= 0) { | |
| 34 overlays.splice(i, 1); | |
| 35 setZ(overlay, ''); | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 function applyOverlayZ(overlay, aboveZ) { | |
| 40 setZ(overlay, aboveZ + 2); | |
| 41 } | |
| 42 | |
| 43 function setZ(element, z) { | |
| 44 element.style.zIndex = z; | |
| 45 } | |
| 46 | |
| 47 function currentOverlay() { | |
| 48 return overlays[overlays.length-1]; | |
| 49 } | |
| 50 | |
| 51 function currentOverlayZ() { | |
| 52 var z; | |
| 53 var current = currentOverlay(); | |
| 54 if (current) { | |
| 55 var z1 = window.getComputedStyle(current).zIndex; | |
| 56 if (!isNaN(z1)) { | |
| 57 z = Number(z1); | |
| 58 } | |
| 59 } | |
| 60 return z || DEFAULT_Z; | |
| 61 } | |
| 62 | |
| 63 function focusOverlay() { | |
| 64 var current = currentOverlay(); | |
| 65 // We have to be careful to focus the next overlay _after_ any current | |
| 66 // transitions are complete (due to the state being toggled prior to the | |
| 67 // transition). Otherwise, we risk infinite recursion when a transitioning | |
| 68 // (closed) overlay becomes the current overlay. | |
| 69 // | |
| 70 // NOTE: We make the assumption that any overlay that completes a transiti
on | |
| 71 // will call into focusOverlay to kick the process back off. Currently: | |
| 72 // transitionend -> _applyFocus -> focusOverlay. | |
| 73 if (current && !current.transitioning) { | |
| 74 current._applyFocus(); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 function trackBackdrop(element) { | |
| 79 // backdrops contains the overlays with a backdrop that are currently | |
| 80 // visible | |
| 81 if (element.opened) { | |
| 82 backdrops.push(element); | |
| 83 } else { | |
| 84 var index = backdrops.indexOf(element); | |
| 85 if (index >= 0) { | |
| 86 backdrops.splice(index, 1); | |
| 87 } | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 function getBackdrops() { | |
| 92 return backdrops; | |
| 93 } | |
| 94 | |
| 95 return { | |
| 96 addOverlay: addOverlay, | |
| 97 removeOverlay: removeOverlay, | |
| 98 currentOverlay: currentOverlay, | |
| 99 currentOverlayZ: currentOverlayZ, | |
| 100 focusOverlay: focusOverlay, | |
| 101 trackBackdrop: trackBackdrop, | |
| 102 getBackdrops: getBackdrops | |
| 103 }; | |
| 104 | |
| 105 })(); | |
| 106 | |
| 107 </script> | |
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Chromium Code Reviews
Issue 1269803005:
Remove third_party/polymer from .gitignore (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master