WKPasswordView.mm   [plain text]

/*
* Copyright (C) 2017-2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/

#import "config.h"
#import "WKPasswordView.h"

#if PLATFORM(IOS_FAMILY)

#import "UIKitSPI.h"
#import "WKContentView.h"
#import "WKWebViewContentProvider.h"
#import <WebCore/LocalizedStrings.h>
#import <wtf/RetainPtr.h>
#import <wtf/text/WTFString.h>

const CGFloat passwordEntryFieldPadding = 10;

@interface WKPasswordView () <UIDocumentPasswordViewDelegate>
@end

@implementation WKPasswordView {
RetainPtr<NSString> _documentName;
RetainPtr<UIScrollView> _scrollView;
RetainPtr<UIDocumentPasswordView> _passwordView;
CGFloat _savedMinimumZoomScale;
CGFloat _savedMaximumZoomScale;
CGFloat _savedZoomScale;
CGSize _savedContentSize;
RetainPtr<UIColor> _savedBackgroundColor;
}

- (instancetype)initWithFrame:(CGRect)frame documentName:(NSString *)documentName
{
self = [super initWithFrame:frame];
if (!self)
return nil;

_documentName = adoptNS([documentName copy]);
_passwordView = adoptNS([[UIDocumentPasswordView alloc] initWithDocumentName:_documentName.get()]);
[_passwordView setFrame:self.bounds];
[_passwordView setPasswordDelegate:self];
[_passwordView setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];

self.autoresizesSubviews = YES;
[self addSubview:_passwordView.get()];

return self;
}

- (void)dealloc
{
[_userDidEnterPassword release];
[super dealloc];
}

- (NSString *)documentName
{
return _documentName.get();
}

- (void)layoutSubviews
{
if (_scrollView)
[_scrollView setContentSize:self.frame.size];
}

- (void)showInScrollView:(UIScrollView *)scrollView
{
_scrollView = scrollView;

_savedMinimumZoomScale = [_scrollView minimumZoomScale];
_savedMaximumZoomScale = [_scrollView maximumZoomScale];
_savedZoomScale = [_scrollView zoomScale];
_savedContentSize = [_scrollView contentSize];
_savedBackgroundColor = [_scrollView backgroundColor];

[_scrollView setMinimumZoomScale:1];
[_scrollView setMaximumZoomScale:1];
[_scrollView setZoomScale:1];
[_scrollView setContentSize:self.frame.size];
[_scrollView setBackgroundColor:[UIColor groupTableViewBackgroundColor]];

[scrollView addSubview:self];
}

- (void)hide
{
[_scrollView setMinimumZoomScale:_savedMinimumZoomScale];
[_scrollView setMaximumZoomScale:_savedMaximumZoomScale];
[_scrollView setZoomScale:_savedZoomScale];
[_scrollView setContentSize:_savedContentSize];
[_scrollView setBackgroundColor:_savedBackgroundColor.get()];

_scrollView = nil;
_savedBackgroundColor = nil;

[self removeFromSuperview];
}

- (void)showPasswordFailureAlert
{
[[_passwordView passwordField] setText:@""];
UIAlertController *alert = [UIAlertController alertControllerWithTitle:WEB_UI_STRING("The document could not be opened with that password.", "document password failure alert message") message:@"" preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:WEB_UI_STRING_KEY("OK", "OK (document password failure alert)", "OK button label in document password failure alert") style:UIAlertActionStyleDefault handler:[](UIAlertAction *) { }];

[alert addAction:defaultAction];

[self.window.rootViewController presentViewController:alert animated:YES completion:nil];
}

- (void)_keyboardDidShow:(NSNotification *)notification
{
UITextField *passwordField = [_passwordView passwordField];
if (!passwordField.isEditing)
return;

CGRect keyboardRect = [UIPeripheralHost visiblePeripheralFrame];
if (CGRectIsEmpty(keyboardRect))
return;

UIWindow *window = [_scrollView window];
keyboardRect = [window convertRect:keyboardRect fromWindow:nil];
keyboardRect = [_scrollView convertRect:keyboardRect fromView:window];

CGRect passwordFieldFrame = [passwordField convertRect:passwordField.bounds toView:_scrollView.get()];

CGSize contentSize = [_passwordView bounds].size;
contentSize.height += CGRectGetHeight(keyboardRect);
[_scrollView setContentSize:contentSize];

if (CGRectIntersectsRect(passwordFieldFrame, keyboardRect)) {
CGFloat yDelta = CGRectGetMaxY(passwordFieldFrame) - CGRectGetMinY(keyboardRect);

CGPoint contentOffset = [_scrollView contentOffset];
contentOffset.y += yDelta + passwordEntryFieldPadding;

[_scrollView setContentOffset:contentOffset animated:YES];
}
}

#pragma mark UIDocumentPasswordViewDelegate

- (void)userDidEnterPassword:(NSString *)password forPasswordView:(UIDocumentPasswordView *)passwordView
{
auto protectedSelf = retainPtr(self);
if (_userDidEnterPassword)
_userDidEnterPassword(password);
}

- (void)didBeginEditingPassword:(UITextField *)passwordField inView:(UIDocumentPasswordView *)passwordView
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
}

- (void)didEndEditingPassword:(UITextField *)passwordField inView:(UIDocumentPasswordView *)passwordView
{
[_scrollView setContentSize:[_passwordView frame].size];

UIEdgeInsets contentInset = [_scrollView contentInset];
[_scrollView setContentOffset:CGPointMake(-contentInset.left, -contentInset.top) animated:YES];

[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardDidShowNotification object:nil];
}

@end

#endif // PLATFORM(IOS_FAMILY)