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// Copyright 2013 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.
#import "components/translate/ios/browser/js_translate_manager.h"
#import <Foundation/Foundation.h>
#include "base/logging.h"
#include "base/mac/bundle_locations.h"
#import "base/mac/scoped_nsobject.h"
#include "base/memory/scoped_ptr.h"
@implementation JsTranslateManager {
base::scoped_nsobject<NSString> _translationScript;
}
- (NSString*)script {
return _translationScript.get();
}
- (void)setScript:(NSString*)script {
// The translation script uses performance.now() for metrics, which is not
// supported except on iOS 8.0. To make the translation script work on these
// iOS versions, add some JavaScript to |script| that defines an
// implementation of performance.now().
NSString* const kPerformancePlaceholder =
@"var performance = window['performance'] || {};"
@"performance.now = performance['now'] ||"
@"(function () { return Date.now(); });\n";
script = [kPerformancePlaceholder stringByAppendingString:script];
// TODO(shreyasv): This leads to some duplicate code from
// CRWJSInjectionManager. Consider refactoring this to its own js injection
// manager.
NSString* path =
[base::mac::FrameworkBundle() pathForResource:@"translate_ios"
ofType:@"js"];
DCHECK(path);
NSError* error = nil;
NSString* content = [NSString stringWithContentsOfFile:path
encoding:NSUTF8StringEncoding
error:&error];
DCHECK(!error && [content length]);
script = [script stringByAppendingString:content];
_translationScript.reset([script copy]);
}
- (void)injectWaitUntilTranslateReadyScript {
[self.receiver evaluateJavaScript:@"__gCrWeb.translate.checkTranslateReady()"
stringResultHandler:nil];
}
- (void)injectTranslateStatusScript {
[self.receiver evaluateJavaScript:@"__gCrWeb.translate.checkTranslateStatus()"
stringResultHandler:nil];
}
- (void)startTranslationFrom:(const std::string&)source
to:(const std::string&)target {
NSString* js =
[NSString stringWithFormat:@"cr.googleTranslate.translate('%s','%s')",
source.c_str(), target.c_str()];
[self.receiver evaluateJavaScript:js stringResultHandler:nil];
}
- (void)revertTranslation {
DCHECK([self hasBeenInjected]);
[self.receiver evaluateJavaScript:@"cr.googleTranslate.revert()"
stringResultHandler:nil];
}
#pragma mark -
#pragma mark CRWJSInjectionManager methods
- (NSString*)injectionContent {
DCHECK(_translationScript);
return _translationScript.autorelease();
}
- (NSString*)presenceBeacon {
return @"cr.googleTranslate";
}
@end
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