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Defer the implementation of select functions in the tech to source handlers if they provide them #2760

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Defer the implementation of select functions in the tech to source handlers if they provide them #2760

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4b67a05
Defer the implementation of functions in the tech to source handlers …
Oct 21, 2015
b7b0c12
Fix Tech's sourceHandler deferring to work with IE
Oct 30, 2015
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29 changes: 21 additions & 8 deletions src/js/tech/tech.js
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Original file line number Diff line number Diff line change
Expand Up @@ -568,16 +568,29 @@ Tech.withSourceHandlers = function(_Tech){
return '';
};

let originalSeekable = _Tech.prototype.seekable;
/*
* When using a source handler, prefer its implementation of
* any function normally provided by the tech.
*/
let deferrable = [
'seekable',
'duration'
];

// when a source handler is registered, prefer its implementation of
// seekable when present.
_Tech.prototype.seekable = function() {
if (this.sourceHandler_ && this.sourceHandler_.seekable) {
return this.sourceHandler_.seekable();
deferrable.forEach(function (fnName) {
let originalFn = this[fnName];

if (typeof originalFn !== 'function') {
return;
}
return originalSeekable.call(this);
};

this[fnName] = function() {
if (this.sourceHandler_ && this.sourceHandler_[fnName]) {
return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);
}
return originalFn.apply(this, arguments);
};
}, _Tech.prototype);

/*
* Create a function for setting the source using a source object
Expand Down