[Author: qsr]

Implements GTMUILocalizer for iOS.

The interface is exactly the same, the implementation does walk the UIKit view
hierarchy, instead of the Cocoa one.

R=thomasvl
APPROVED=thomasvl

5 files changed, 884 insertions, 0 deletions

diff --git a/iPhone/GTMUILocalizer.h b/iPhone/GTMUILocalizer.h
new file mode 100644
index 0000000..2917e61
--- /dev/null
+++ b/iPhone/GTMUILocalizer.h
@@ -0,0 +1,94 @@
+//
+//  GTMUILocalizer.h
+//
+//  Copyright 2011 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <UIKit/UIKit.h>
+
+// A class for localizing nibs by doing simple string replacement.
+// To use this, make an instance of GTMUILocalizer in your nib. Connect the
+// owner_ outlet of the your instance to the File Owner of the nib. It expects
+// the owner_ outlet to be an instance or subclass of NSWindowController,
+// NSViewController or NSApplication. Using the bundle of the nib it will then
+// localize any items in the NSWindowController's window and subviews, or the
+// NSViewController's view and subviews or the NSApplication's main menu
+// and dockmenu at when awakeFromNib is called on the GTMUILocalizer instance.
+// You can optionally hook up otherObjectToLocalize_ and
+// yetAnotherObjectToLocalize_ and those will also be localized. Strings in the
+// nib that you want localized must start with ^ (shift-6). The strings will
+// be looked up in the Localizable.strings table without the caret as the
+// key.
+// Things that will be localized are:
+//  - Titles and altTitles (for menus, buttons, windows, menuitems, tabViewItem)
+//  - stringValue (for labels)
+//  - tooltips
+//  - accessibility help
+//  - menus
+//
+// Due to technical limitations, accessibility description cannot be localized.
+// See http://lists.apple.com/archives/Accessibility-dev/2009/Dec/msg00004.html
+// and http://openradar.appspot.com/7496255 for more information.
+//
+// As an example if I wanted to localize a button with the word "Print" on
+// it, I would put it in a window controlled by a NSWindowController that was
+// the owner of the nib. I would set it's title to be "^Print". I would then
+// create an instance of GTMUILocalizer and set it's owner_ to be the owner
+// of the nib.
+// In my Localizable.strings file in my fr.lproj directory for the bundle
+// I would put "Print" = "Imprimer";
+// Then when my app launched in French I would get a button labeled
+// "Imprimer". Note that GTMUILocalizer is only for strings, and doesn't
+// resize, move or change text alignment on any of the things it modifies.
+// If you absolutely need a caret at the beginning of the string
+// post-localization, you can put "Foo" = "^Foo"; in your strings file and
+// it will work.
+// Your nib could be located in a variety of places depending on what you want
+// to do. I would recommend having your "master" nib directly in Resources.
+// If for some reason you needed to do some custom localization of the
+// nib you could copy the master nib into your specific locale folder, and
+// then you only need to adjust the items in the nib that you need to
+// customize. You can leave the strings in the "^Foo" convention and they
+// will localize properly. This keeps the differences between the nibs down
+// to the bare essentials.
+//
+// NOTE: NSToolbar localization support is limited to only working on the
+// default items in the toolbar. We cannot localize items that are on of the
+// customization palette but not in the default items because there is not an
+// API for NSToolbar to get all possible items. You are responsible for
+// localizing all non-default toolbar items by hand.
+//
+@interface GTMUILocalizer : NSObject {
+ @private
+  IBOutlet id owner_;
+  IBOutlet id otherObjectToLocalize_;
+  IBOutlet id yetAnotherObjectToLocalize_;
+  NSBundle *bundle_;
+}
+- (id)initWithBundle:(NSBundle *)bundle;
+
+// Localize |object|. If |recursive| is true, it will attempt
+// to localize objects owned/referenced by |object|.
+- (void)localizeObject:(id)object recursively:(BOOL)recursive;
+
+// A method for subclasses to override in case you have a different
+// way to go about getting localized strings.
+// If |string| does not start with ^ you should return nil.
+// If |string| is nil, you should return nil
+- (NSString *)localizedStringForString:(NSString *)string;
+
+// Allows subclasses to override how the bundle is picked up
++ (NSBundle *)bundleForOwner:(id)owner;
+@end
diff --git a/iPhone/GTMUILocalizer.m b/iPhone/GTMUILocalizer.m
new file mode 100644
index 0000000..5eff255
--- /dev/null
+++ b/iPhone/GTMUILocalizer.m
@@ -0,0 +1,207 @@
+//
+//  GTMUILocalizer.m
+//
+//  Copyright 2011 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMDefines.h"
+#import "GTMUILocalizer.h"
+
+@interface GTMUILocalizer (GTMUILocalizerPrivate)
+- (void)localizeAccessibility:(id)object;
+
+// Never recursively call any of these methods. Always call 
+// -[self localizeObject:recursively:] otherwise bindings will not be
+// localized properly.
+- (void)localizeToolbar:(UIToolbar *)toolbar;
+- (void)localizeView:(UIView *)view recursively:(BOOL)recursive;
+
+@end
+
+@implementation GTMUILocalizer
+- (id)initWithBundle:(NSBundle *)bundle {
+  if ((self = [super init])) {
+    bundle_ = [bundle retain];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [bundle_ release];
+  [super dealloc];
+}
+
+- (void)awakeFromNib {
+  if (owner_) {
+    NSBundle *newBundle = [[self class] bundleForOwner:owner_];
+    bundle_ = [newBundle retain];
+    [self localizeObject:owner_ recursively:YES];
+    [self localizeObject:otherObjectToLocalize_ recursively:YES];
+    [self localizeObject:yetAnotherObjectToLocalize_ recursively:YES];
+  } else {
+    _GTMDevLog(@"Expected an owner_ set for %@", self);
+  }
+}
+
++ (NSBundle *)bundleForOwner:(id)owner {
+  NSBundle *newBundle = nil;
+  if (owner) {
+    if ([owner isKindOfClass:[UIViewController class]]) {
+      newBundle = [(UIViewController *)owner nibBundle];
+    }
+    if (!newBundle) {
+      newBundle = [NSBundle mainBundle];
+    }
+  }
+  return newBundle;
+}
+
+- (NSString *)localizedStringForString:(NSString *)string {
+  NSString *localized = nil;
+  if (bundle_ && [string hasPrefix:@"^"]) {
+    NSString *notFoundValue = @"__GTM_NOT_FOUND__";
+    NSString *key = [string substringFromIndex:1];
+    localized = [bundle_ localizedStringForKey:key
+                                         value:notFoundValue
+                                         table:nil];
+    if ([localized isEqualToString:notFoundValue]) {
+      localized = nil;
+    }
+  }
+  return localized;
+}
+
+- (void)localizeObject:(id)object recursively:(BOOL)recursive {
+  if (object) {
+    if ([object isKindOfClass:[UIViewController class]]) {
+        UIView *view = [object view];
+        [self localizeView:view recursively:recursive];
+    } else if ([object isKindOfClass:[UIView class]]) {
+      [self localizeView:(UIView *)object recursively:recursive];
+    } else if ([object isKindOfClass:[UIToolbar class]]) {
+      [self localizeToolbar:(UIToolbar*)object];
+    }
+  }
+}
+
+- (void)localizeToolbar:(UIToolbar *)toolbar {
+  // NOTE: Like the header says, -items only gives us what is in the toolbar
+  // which is usually the default items, if the toolbar supports customization
+  // there is no way to fetch those possible items to tweak their contents.
+  for (UIBarItem* item in [toolbar items]) {
+    NSString *title = [item title];
+    if (title) {
+      title = [self localizedStringForString:title];
+      if (title) {
+        [item setTitle:title];
+      }
+    }
+  }
+}
+
+- (void)localizeView:(UIView *)view recursively:(BOOL)recursive {
+  if (view) {
+    // Do accessibility on views.
+    [self localizeAccessibility:view];
+
+    if (recursive) {
+      for (UIView *subview in [view subviews]) {
+        [self localizeObject:subview recursively:recursive];
+      }
+    }
+
+    // Then do all possible strings.
+    if ([view respondsToSelector:@selector(title)]
+        && [view respondsToSelector:@selector(setTitle:)]) {
+      NSString *title = [view performSelector:@selector(title)];
+      if (title) {
+        NSString *localizedTitle = [self localizedStringForString:title];
+        if (localizedTitle) {
+          [view performSelector:@selector(setTitle:) withObject:localizedTitle];
+        }
+      }
+    }
+
+    if ([view respondsToSelector:@selector(text)]
+        && [view respondsToSelector:@selector(setText:)]) {
+      NSString *text = [view performSelector:@selector(text)];
+      if (text) {
+        NSString *localizedText = [self localizedStringForString:text];
+        if (localizedText) {
+          [view performSelector:@selector(setText:) withObject:localizedText];
+        }
+      }
+    }
+
+    if ([view respondsToSelector:@selector(placeholder)]
+        && [view respondsToSelector:@selector(setPlaceholder:)]) {
+      NSString *placeholder = [view performSelector:@selector(placeholder)];
+      if (placeholder) {
+        NSString *localizedPlaceholder =
+            [self localizedStringForString:placeholder];
+        if (localizedPlaceholder) {
+          [view performSelector:@selector(setPlaceholder:)
+                     withObject:localizedPlaceholder];
+        }
+      }
+    }
+  }
+}
+
+- (void)localizeAccessibility:(id)object {
+  if ([object respondsToSelector:@selector(accessibilityHint)]
+      && [object respondsToSelector:@selector(setAccessibilityHint:)]) {
+    NSString *accessibilityHint =
+        [object performSelector:@selector(accessibilityHint)];
+    if (accessibilityHint) {
+      NSString *localizedAccessibilityHint =
+          [self localizedStringForString:accessibilityHint];
+      if (localizedAccessibilityHint) {
+        [object performSelector:@selector(setAccessibilityHint:)
+                   withObject:localizedAccessibilityHint];
+      }
+    }
+  }
+
+  if ([object respondsToSelector:@selector(accessibilityLabel)]
+      && [object respondsToSelector:@selector(setAccessibilityLabel:)]) {
+    NSString *accessibilityLabel =
+        [object performSelector:@selector(accessibilityLabel)];
+    if (accessibilityLabel) {
+      NSString *localizedAccessibilityLabel =
+          [self localizedStringForString:accessibilityLabel];
+      if (localizedAccessibilityLabel) {
+        [object performSelector:@selector(setAccessibilityLabel:)
+                   withObject:localizedAccessibilityLabel];
+      }
+    }
+  }
+
+  if ([object respondsToSelector:@selector(accessibilityValue)]
+      && [object respondsToSelector:@selector(setAccessibilityValue:)]) {
+    NSString *accessibilityValue =
+        [object performSelector:@selector(accessibilityValue)];
+    if (accessibilityValue) {
+      NSString *localizedAccessibilityValue =
+          [self localizedStringForString:accessibilityValue];
+      if (localizedAccessibilityValue) {
+        [object performSelector:@selector(setAccessibilityValue:)
+                   withObject:localizedAccessibilityValue];
+      }
+    }
+  }
+}
+
+@end
diff --git a/iPhone/GTMUILocalizerTest.h b/iPhone/GTMUILocalizerTest.h
new file mode 100644
index 0000000..041444d
--- /dev/null
+++ b/iPhone/GTMUILocalizerTest.h
@@ -0,0 +1,29 @@
+//
+//  GTMUILocalizerTest.h
+//
+//  Copyright 2011 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+
+#import <UIKit/UIKit.h>
+
+#import "GTMUILocalizer.h"
+
+@interface GTMUILocalizerTestViewController : UIViewController {
+ @private
+  UILabel *label_;
+}
+
+@property(nonatomic, retain)IBOutlet UILabel *label;
+
+@end
diff --git a/iPhone/GTMUILocalizerTest.m b/iPhone/GTMUILocalizerTest.m
new file mode 100644
index 0000000..116d170
--- /dev/null
+++ b/iPhone/GTMUILocalizerTest.m
@@ -0,0 +1,87 @@
+//
+//  GTMUILocalizerTest.m
+//
+//  Copyright 2011 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+
+#import "GTMUILocalizerTest.h"
+#import "GTMSenTestCase.h"
+
+@interface TestUILocalizer : GTMUILocalizer
+- (void)localize:(id)object;
+@end
+
+@implementation TestUILocalizer
+- (NSString *)localizedStringForString:(NSString *)string{
+  return [string substringFromIndex:5];
+}
+
+- (void)localize:(id)object {
+  [self localizeObject:object recursively:YES];
+}
+@end
+
+
+@implementation GTMUILocalizerTestViewController
+
+@synthesize label = label_;
+
+- (id)init {
+  NSBundle *bundle = [NSBundle bundleForClass:[self class]];
+  return [self initWithNibName:@"GTMUILocalizerTest" bundle:bundle];
+}
+@end
+
+@interface GTMUILocalizerTest : GTMTestCase 
+@end
+
+@implementation GTMUILocalizerTest
+- (void)testLocalization {
+  GTMUILocalizerTestViewController* controller =
+    [[GTMUILocalizerTestViewController alloc] init];
+
+  // Load the view.
+  [controller view];
+
+  STAssertEqualStrings(@"^IDS_FOO", [[controller label] text], nil);
+
+// Accessibility label seems to not be working at all. They always are nil.
+// Even when setting those explicitely there, the getter always returns nil.
+// This might cause because the gobal accessibility switch is not on during the
+// tests.
+#if 0
+  STAssertEqualStrings(@"^IDS_FOO", [[controller view] accessibilityLabel],
+      nil);
+  STAssertEqualStrings(@"^IDS_FOO", [[controller view] accessibilityHint],
+      nil);
+  STAssertEqualStrings(@"^IDS_FOO", [[controller label] accessibilityLabel],
+      nil);
+  STAssertEqualStrings(@"^IDS_FOO", [[controller label] accessibilityHint],
+      nil);
+#endif
+
+  TestUILocalizer *localizer = [[TestUILocalizer alloc] init];
+  [localizer localize:[controller view]];
+
+  STAssertEqualStrings(@"FOO", [[controller label] text], nil);
+
+// Accessibility label seems to not be working at all. They always are nil.
+#if 0
+  STAssertEqualStrings(@"FOO", [[controller view] accessibilityLabel], nil);
+  STAssertEqualStrings(@"FOO", [[controller view] accessibilityHint], nil);
+  STAssertEqualStrings(@"FOO", [[controller label] accessibilityLabel], nil);
+  STAssertEqualStrings(@"FOO", [[controller label] accessibilityHint], nil);
+#endif
+}
+@end
diff --git a/iPhone/GTMUILocalizerTest.xib b/iPhone/GTMUILocalizerTest.xib
new file mode 100644
index 0000000..ed6a8a4
--- /dev/null
+++ b/iPhone/GTMUILocalizerTest.xib
@@ -0,0 +1,467 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<archive type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="7.10">
+	<data>
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+						<bool key="IBUIUserInteractionEnabled">NO</bool>
+						<object class="IBUIAccessibilityConfiguration" key="IBUIAccessibilityConfiguration">
+							<string key="IBUIAccessibilityHint">^IDS_FOO</string>
+							<string key="IBUIAccessibilityLabel">^IDS_FOO</string>
+							<boolean value="YES" key="IBUIIsAccessibilityElement"/>
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+						<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
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+						</object>
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+						<float key="IBUIMinimumFontSize">10</float>
+					</object>
+				</object>
+				<string key="NSFrameSize">{320, 460}</string>
+				<reference key="NSSuperview"/>
+				<object class="NSColor" key="IBUIBackgroundColor">
+					<int key="NSColorSpace">3</int>
+					<bytes key="NSWhite">MQA</bytes>
+					<object class="NSColorSpace" key="NSCustomColorSpace">
+						<int key="NSID">2</int>
+					</object>
+				</object>
+				<object class="IBUIAccessibilityConfiguration" key="IBUIAccessibilityConfiguration">
+					<string key="IBUIAccessibilityHint">^IDS_FOO</string>
+					<string key="IBUIAccessibilityLabel">^IDS_FOO</string>
+					<boolean value="YES" key="IBUIIsAccessibilityElement"/>
+				</object>
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+			</object>
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+					<object class="IBCocoaTouchOutletConnection" key="connection">
+						<string key="label">label</string>
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+					<string>5.IBViewBoundsToFrameTransform</string>
+					<string>9.IBPluginDependency</string>
+				</object>
+				<object class="NSMutableArray" key="dict.values">
+					<bool key="EncodedWithXMLCoder">YES</bool>
+					<string>GTMUILocalizerTestViewController</string>
+					<string>UIResponder</string>
+					<string>{{870, 485}, {320, 460}}</string>
+					<string>com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
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