b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
85 lines
2.5 KiB
JavaScript
Executable file
85 lines
2.5 KiB
JavaScript
Executable file
/* exported NFC */
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'use strict';
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/*
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* This module helps to manage NFC sharing in an app.
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* Call share() when the UI displays an object that can be shared as a file.
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* Pass the file or blob object itself or a function that returns a Promise
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* that resolves to the file.
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* When the UI changes so that no sharable object is visible, call unshare().
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*/
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var NFC = {
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shrinkingUI: null,
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peer: null,
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share: function share(f, options) {
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if (navigator.mozNfc) {
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// This is a workaround for bug 1163957 which is only applied to the open
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// activity. The complete solution should be done in bug 1109495.
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if (window.ShrinkingUI && options) {
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NFC.shrinkingUI = new window.ShrinkingUI(options.foregroundElement,
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options.backgroundElement);
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window.addEventListener('shrinking-sent',
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NFC.sendFile.bind(NFC, f));
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navigator.mozNfc.onpeerfound = function(evt) {
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if (!evt.peer) {
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return;
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}
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NFC.peer = evt.peer;
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NFC.shrinkingUI.start();
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// Without calling preventDefault, gecko will fire onpeerlost right
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// after onpeerfound since it think gallery app would not handle it.
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evt.preventDefault();
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};
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navigator.mozNfc.onpeerlost = function() {
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NFC.peer = null;
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NFC.shrinkingUI.stop();
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};
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} else {
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// Enable NFC sharing by defining a "peerready" callback that
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// calls sendFile() to transfer the current image or video to the peer
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navigator.mozNfc.onpeerready = function(event) {
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NFC.peer = event.peer;
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NFC.sendFile(f);
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};
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}
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}
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},
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sendFile: function(f) {
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if (!NFC.peer) {
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return;
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}
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if (typeof f === 'function') {
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var promise = f();
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promise.then(function(file) {
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NFC.peer.sendFile(file);
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if (NFC.shrinkingUI) {
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NFC.shrinkingUI.stop();
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}
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});
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}
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else {
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NFC.peer.sendFile(f);
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if (NFC.shrinkingUI) {
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NFC.shrinkingUI.stop();
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}
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}
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},
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unshare: function unshare() {
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// Disable NFC sharing simply by removing the callback
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if (navigator.mozNfc) {
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NFC.peer = null;
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navigator.mozNfc.onpeerready = null;
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navigator.mozNfc.onpeerfound = null;
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navigator.mozNfc.onpeerlost = null;
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if (NFC.shrinkingUI) {
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NFC.shrinkingUI.stop();
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NFC.shrinkingUI = null;
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window.removeEventListener('shrinking-sent',
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NFC.sendFile);
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}
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}
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}
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};
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