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//
// 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:].
- (void)localizeToolbar:(UIToolbar *)toolbar;
- (void)localizeSegmentedControl:(UISegmentedControl *)segmentedControl;
- (void)localizeView:(UIView *)view recursively:(BOOL)recursive;
- (void)localizeButton:(UIButton *)button;
@end
@implementation GTMUILocalizer
@synthesize owner = owner_;
@synthesize otherObjectToLocalize = otherObjectToLocalize_;
@synthesize yetAnotherObjectToLocalize = yetAnotherObjectToLocalize_;
- (id)initWithBundle:(NSBundle *)bundle {
if ((self = [super init])) {
bundle_ = [bundle retain];
}
return self;
}
- (void)dealloc {
[bundle_ release];
[super dealloc];
}
- (void)awakeFromNib {
[super awakeFromNib];
id owner = self.owner;
if (owner) {
NSBundle *newBundle = [[self class] bundleForOwner:owner];
bundle_ = [newBundle retain];
[self localizeObject:self.owner recursively:YES];
[self localizeObject:self.otherObjectToLocalize recursively:YES];
[self localizeObject:self.yetAnotherObjectToLocalize recursively:YES];
} else {
_GTMDevLog(@"Expected an owner set for %@", self);
}
// Clear the outlets.
self.owner = nil;
self.otherObjectToLocalize = nil;
self.yetAnotherObjectToLocalize = nil;
}
+ (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:[UIToolbar class]]) {
[self localizeToolbar:(UIToolbar*)object];
} else if ([object isKindOfClass:[UISegmentedControl class]]) {
[self localizeSegmentedControl:(UISegmentedControl*)object];
} else if ([object isKindOfClass:[UIView class]]) {
[self localizeView:(UIView *)object recursively:recursive];
}
}
}
- (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)localizeSegmentedControl:(UISegmentedControl *)segmentedControl {
// A UISegmentedControl uses a few objects as subviews, but they aren't
// documented. It happened to work out that their inherritance was right
// with the selectors they implemented that things localized, but iOS 6
// changed some of that, so they are now directly handled.
NSUInteger numberOfSegments = segmentedControl.numberOfSegments;
for (NSUInteger i = 0; i < numberOfSegments; ++i) {
NSString *title = [segmentedControl titleForSegmentAtIndex:i];
if (title) {
title = [self localizedStringForString:title];
if (title) {
[segmentedControl setTitle:title forSegmentAtIndex:i];
}
}
}
}
- (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];
}
}
// Specific types
if ([view isKindOfClass:[UIButton class]]) {
[self localizeButton:(UIButton *)view];
}
// 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];
}
}
}
}
- (void)localizeButton:(UIButton *)button {
UIControlState allStates[] = { UIControlStateNormal,
UIControlStateHighlighted,
UIControlStateDisabled,
UIControlStateSelected };
for (size_t idx = 0; idx < (sizeof(allStates)/sizeof(allStates[0])); ++idx) {
UIControlState state = allStates[idx];
NSString *value = [button titleForState:state];
if (value) {
NSString* localizedValue = [self localizedStringForString:value];
if (localizedValue) {
[button setTitle:localizedValue forState:state];
}
}
}
}
@end
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