1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/test/unit/image_load_helpers.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,125 @@
1.4 +/*
1.5 + * Helper structures to track callbacks from image and channel loads.
1.6 + */
1.7 +
1.8 +// START_REQUEST and STOP_REQUEST are used by ChannelListener, and
1.9 +// stored in ChannelListener.requestStatus.
1.10 +const START_REQUEST = 0x01;
1.11 +const STOP_REQUEST = 0x02;
1.12 +const DATA_AVAILABLE = 0x04;
1.13 +
1.14 +// One bit per callback that imageListener below implements. Stored in
1.15 +// ImageListener.state.
1.16 +const SIZE_AVAILABLE = 0x01;
1.17 +const FRAME_UPDATE = 0x02;
1.18 +const FRAME_COMPLETE = 0x04;
1.19 +const LOAD_COMPLETE = 0x08;
1.20 +const DECODE_COMPLETE = 0x10;
1.21 +
1.22 +// An implementation of imgIScriptedNotificationObserver with the ability to
1.23 +// call specified functions on onStartRequest and onStopRequest.
1.24 +function ImageListener(start_callback, stop_callback)
1.25 +{
1.26 + this.sizeAvailable = function onSizeAvailable(aRequest)
1.27 + {
1.28 + do_check_false(this.synchronous);
1.29 +
1.30 + this.state |= SIZE_AVAILABLE;
1.31 +
1.32 + if (this.start_callback)
1.33 + this.start_callback(this, aRequest);
1.34 + }
1.35 + this.frameComplete = function onFrameComplete(aRequest)
1.36 + {
1.37 + do_check_false(this.synchronous);
1.38 +
1.39 + this.state |= FRAME_COMPLETE;
1.40 + }
1.41 + this.decodeComplete = function onDecodeComplete(aRequest)
1.42 + {
1.43 + do_check_false(this.synchronous);
1.44 +
1.45 + this.state |= DECODE_COMPLETE;
1.46 + }
1.47 + this.loadComplete = function onLoadcomplete(aRequest)
1.48 + {
1.49 + do_check_false(this.synchronous);
1.50 +
1.51 + try {
1.52 + aRequest.requestDecode();
1.53 + } catch (e) {
1.54 + do_print("requestDecode threw " + e);
1.55 + }
1.56 +
1.57 + this.state |= LOAD_COMPLETE;
1.58 +
1.59 + if (this.stop_callback)
1.60 + this.stop_callback(this, aRequest);
1.61 + }
1.62 + this.frameUpdate = function onFrameUpdate(aRequest)
1.63 + {
1.64 + }
1.65 + this.isAnimated = function onIsAnimated()
1.66 + {
1.67 + }
1.68 +
1.69 + // Initialize the synchronous flag to true to start. This must be set to
1.70 + // false before exiting to the event loop!
1.71 + this.synchronous = true;
1.72 +
1.73 + // A function to call when onStartRequest is called.
1.74 + this.start_callback = start_callback;
1.75 +
1.76 + // A function to call when onStopRequest is called.
1.77 + this.stop_callback = stop_callback;
1.78 +
1.79 + // The image load/decode state.
1.80 + // A bitfield that tracks which callbacks have been called. Takes the bits
1.81 + // defined above.
1.82 + this.state = 0;
1.83 +}
1.84 +
1.85 +function NS_FAILED(val)
1.86 +{
1.87 + return !!(val & 0x80000000);
1.88 +}
1.89 +
1.90 +function ChannelListener()
1.91 +{
1.92 + this.onStartRequest = function onStartRequest(aRequest, aContext)
1.93 + {
1.94 + if (this.outputListener)
1.95 + this.outputListener.onStartRequest(aRequest, aContext);
1.96 +
1.97 + this.requestStatus |= START_REQUEST;
1.98 + }
1.99 +
1.100 + this.onDataAvailable = function onDataAvailable(aRequest, aContext, aInputStream, aOffset, aCount)
1.101 + {
1.102 + if (this.outputListener)
1.103 + this.outputListener.onDataAvailable(aRequest, aContext, aInputStream, aOffset, aCount);
1.104 +
1.105 + this.requestStatus |= DATA_AVAILABLE;
1.106 + }
1.107 +
1.108 + this.onStopRequest = function onStopRequest(aRequest, aContext, aStatusCode)
1.109 + {
1.110 + if (this.outputListener)
1.111 + this.outputListener.onStopRequest(aRequest, aContext, aStatusCode);
1.112 +
1.113 + // If we failed (or were canceled - failure is implied if canceled),
1.114 + // there's no use tracking our state, since it's meaningless.
1.115 + if (NS_FAILED(aStatusCode))
1.116 + this.requestStatus = 0;
1.117 + else
1.118 + this.requestStatus |= STOP_REQUEST;
1.119 + }
1.120 +
1.121 + // A listener to pass the notifications we get to.
1.122 + this.outputListener = null;
1.123 +
1.124 + // The request's status. A bitfield that holds one or both of START_REQUEST
1.125 + // and STOP_REQUEST, according to which callbacks have been called on the
1.126 + // associated request.
1.127 + this.requestStatus = 0;
1.128 +}
