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<!DOCTYPE html>
<!--
Copyright 2015 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<link rel="import" href="/tracing/base/utils.html">
<script>
'use strict';
tr.exportTo('tr.mre', function() {
const FunctionRegistry = {
allFunctions_: [],
allFunctionsByName_: {},
get allFunctions() { return this.allFunctions_; },
get allFunctionsByName() { return this.allFunctionsByName_; }
};
FunctionRegistry.getFunction = function(name) {
return this.allFunctionsByName_[name];
};
FunctionRegistry.register = function(func) {
if (func.name === '') {
throw new Error('Registered functions must not be anonymous');
}
if (this.allFunctionsByName[func.name] !== undefined) {
throw new Error('Function named ' + func.name + 'is already registered.');
}
this.allFunctionsByName[func.name] = func;
this.allFunctions.push(func);
};
function ModuleToLoad(href, filename) {
if ((href !== undefined) ? (filename !== undefined) :
(filename === undefined)) {
throw new Error('ModuleToLoad must specify exactly one of href or ' +
'filename');
}
this.href = href;
this.filename = filename;
}
ModuleToLoad.prototype = {
asDict() {
if (this.href !== undefined) {
return {'href': this.href};
}
return {'filename': this.filename};
},
toString() {
if (this.href !== undefined) {
return 'ModuleToLoad(href="' + this.href + '")';
}
return 'ModuleToLoad(filename="' + this.filename + '")';
}
};
ModuleToLoad.fromDict = function(moduleDict) {
return new ModuleToLoad(moduleDict.href, moduleDict.filename);
};
function FunctionHandle(modulesToLoad, functionName, opt_options) {
if (!(modulesToLoad instanceof Array)) {
throw new Error('modulesToLoad in FunctionHandle must be an array');
}
if (typeof(functionName) !== 'string') {
throw new Error('functionName in FunctionHandle must be a string');
}
this.modulesToLoad = modulesToLoad;
this.functionName = functionName;
this.options_ = opt_options;
}
FunctionHandle.prototype = {
get options() {
return this.options_;
},
asDict() {
return {
'modules_to_load': this.modulesToLoad.map(
function(m) {return m.asDict();}),
'function_name': this.functionName,
'options': this.options_
};
},
asUserFriendlyString() {
const parts = this.modulesToLoad.map(mtl => mtl.filename);
parts.push(this.functionName);
parts.push(JSON.stringify(this.options_));
return parts.join(',');
},
hasHrefs() {
for (const module in this.modulesToLoad) {
if (this.modulesToLoad[module].href !== undefined) {
return true;
}
}
return false;
},
load() {
if (this.hasHrefs()) {
const err = new Error(
'FunctionHandle named ' + this.functionName +
' specifies hrefs, which cannot be loaded.');
err.name = 'FunctionLoadingError';
throw err;
}
for (const module in this.modulesToLoad) {
const filename = this.modulesToLoad[module].filename;
try {
HTMLImportsLoader.loadHTMLFile(filename);
} catch (err) {
err.name = 'FunctionLoadingError';
throw err;
}
}
const func = FunctionRegistry.getFunction(this.functionName);
if (func === undefined) {
const err = new Error(
'No registered function named ' + this.functionName);
err.name = 'FunctionNotDefinedError';
throw err;
}
return func;
},
toString() {
const modulesToLoadStr = this.modulesToLoad.map(function(module) {
return module.toString();
});
return 'FunctionHandle(modulesToLoad=[' + modulesToLoadStr + '], ' +
'functionName="' + this.functionName + '", options="' +
JSON.stringify(this.options_) + '")';
}
};
FunctionHandle.loadFromFilename_ = function(filename) {
try {
const numFunctionsBefore = FunctionRegistry.allFunctions.length;
HTMLImportsLoader.loadHTMLFile(filename);
} catch (err) {
err.name = 'FunctionLoadingError';
throw err;
}
// Verify a new function was registered.
const numFunctionsNow = FunctionRegistry.allFunctions.length;
if (numFunctionsNow !== (numFunctionsBefore + 1)) {
const err = new Error(
filename + ' didn\'t call FunctionRegistry.register');
err.name = 'FunctionNotDefinedError';
throw err;
}
return FunctionRegistry.allFunctions[numFunctionsNow - 1];
};
FunctionHandle.fromDict = function(handleDict) {
const options = handleDict.options;
let modulesToLoad;
if (handleDict.modules_to_load !== undefined) {
modulesToLoad = handleDict.modules_to_load.map(function(module) {
return ModuleToLoad.fromDict(module);
});
}
return new FunctionHandle(modulesToLoad, handleDict.function_name, options);
};
return {
FunctionHandle,
ModuleToLoad,
FunctionRegistry,
};
});
</script>
|
