blob: 328f51b208e08666e45cca24e018365d3f27245e [file] [log] [blame]
// Copyright 2019 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.
#include "ui/views_bridge_mac/alert.h"
#include "base/i18n/rtl.h"
#import "base/mac/foundation_util.h"
#include "base/strings/sys_string_conversions.h"
#include "ui/accelerated_widget_mac/window_resize_helper_mac.h"
#include "ui/base/l10n/l10n_util_mac.h"
using views_bridge_mac::mojom::AlertBridgeInitParams;
using views_bridge_mac::mojom::AlertDisposition;
namespace {
const int kSlotsPerLine = 50;
const int kMessageTextMaxSlots = 2000;
} // namespace
////////////////////////////////////////////////////////////////////////////////
// AlertBridgeHelper:
// Helper object that receives the notification that the dialog/sheet is
// going away. Is responsible for cleaning itself up.
@interface AlertBridgeHelper : NSObject <NSAlertDelegate> {
@private
base::scoped_nsobject<NSAlert> alert_;
views_bridge_mac::AlertBridge* alertBridge_; // Weak.
base::scoped_nsobject<NSTextField> textField_;
}
@property(assign, nonatomic) views_bridge_mac::AlertBridge* alertBridge;
// Returns the underlying alert.
- (NSAlert*)alert;
// Set a blank icon for dialogs with text provided by the page.
- (void)setBlankIcon;
// Add a text field to the alert.
- (void)addTextFieldWithPrompt:(NSString*)prompt;
// Presents an AppKit blocking dialog.
- (void)showAlert;
@end
@implementation AlertBridgeHelper
@synthesize alertBridge = alertBridge_;
- (void)initAlert:(AlertBridgeInitParams*)params {
alert_.reset([[NSAlert alloc] init]);
[alert_ setDelegate:self];
if (params->hide_application_icon)
[self setBlankIcon];
if (params->text_field_text) {
[self addTextFieldWithPrompt:base::SysUTF16ToNSString(
*params->text_field_text)];
}
NSString* informative_text = base::SysUTF16ToNSString(params->message_text);
// Truncate long JS alerts - crbug.com/331219
NSCharacterSet* newline_char_set = [NSCharacterSet newlineCharacterSet];
for (size_t index = 0, slots_count = 0; index < informative_text.length;
++index) {
unichar current_char = [informative_text characterAtIndex:index];
if ([newline_char_set characterIsMember:current_char])
slots_count += kSlotsPerLine;
else
slots_count++;
if (slots_count > kMessageTextMaxSlots) {
base::string16 info_text = base::SysNSStringToUTF16(informative_text);
informative_text = base::SysUTF16ToNSString(
gfx::TruncateString(info_text, index, gfx::WORD_BREAK));
break;
}
}
[alert_ setInformativeText:informative_text];
NSString* message_text = l10n_util::FixUpWindowsStyleLabel(params->title);
[alert_ setMessageText:message_text];
[alert_ addButtonWithTitle:l10n_util::FixUpWindowsStyleLabel(
params->primary_button_text)];
if (params->secondary_button_text) {
NSButton* other =
[alert_ addButtonWithTitle:l10n_util::FixUpWindowsStyleLabel(
*params->secondary_button_text)];
[other setKeyEquivalent:@"\e"];
}
if (params->check_box_text) {
[alert_ setShowsSuppressionButton:YES];
NSString* suppression_title =
l10n_util::FixUpWindowsStyleLabel(*params->check_box_text);
[[alert_ suppressionButton] setTitle:suppression_title];
}
// Fix RTL dialogs.
//
// Mac OS X will always display NSAlert strings as LTR. A workaround is to
// manually set the text as attributed strings in the implementing
// NSTextFields. This is a basic correctness issue.
//
// In addition, for readability, the overall alignment is set based on the
// directionality of the first strongly-directional character.
//
// If the dialog fields are selectable then they will scramble when clicked.
// Therefore, selectability is disabled.
//
// See http://crbug.com/70806 for more details.
bool message_has_rtl =
base::i18n::StringContainsStrongRTLChars(params->title);
bool informative_has_rtl =
base::i18n::StringContainsStrongRTLChars(params->message_text);
NSTextField* message_text_field = nil;
NSTextField* informative_text_field = nil;
if (message_has_rtl || informative_has_rtl) {
// Force layout of the dialog. NSAlert leaves its dialog alone once laid
// out; if this is not done then all the modifications that are to come will
// be un-done when the dialog is finally displayed.
[alert_ layout];
// Locate the NSTextFields that implement the text display. These are
// actually available as the ivars |_messageField| and |_informationField|
// of the NSAlert, but it is safer (and more forward-compatible) to search
// for them in the subviews.
for (NSView* view in [[[alert_ window] contentView] subviews]) {
NSTextField* text_field = base::mac::ObjCCast<NSTextField>(view);
if ([[text_field stringValue] isEqualTo:message_text])
message_text_field = text_field;
else if ([[text_field stringValue] isEqualTo:informative_text])
informative_text_field = text_field;
}
// This may fail in future OS releases, but it will still work for shipped
// versions of Chromium.
DCHECK(message_text_field);
DCHECK(informative_text_field);
}
if (message_has_rtl && message_text_field) {
base::scoped_nsobject<NSMutableParagraphStyle> alignment(
[[NSParagraphStyle defaultParagraphStyle] mutableCopy]);
[alignment setAlignment:NSRightTextAlignment];
NSDictionary* alignment_attributes =
@{NSParagraphStyleAttributeName : alignment};
base::scoped_nsobject<NSAttributedString> attr_string(
[[NSAttributedString alloc] initWithString:message_text
attributes:alignment_attributes]);
[message_text_field setAttributedStringValue:attr_string];
[message_text_field setSelectable:NO];
}
if (informative_has_rtl && informative_text_field) {
base::i18n::TextDirection direction =
base::i18n::GetFirstStrongCharacterDirection(params->message_text);
base::scoped_nsobject<NSMutableParagraphStyle> alignment(
[[NSParagraphStyle defaultParagraphStyle] mutableCopy]);
[alignment setAlignment:(direction == base::i18n::RIGHT_TO_LEFT)
? NSRightTextAlignment
: NSLeftTextAlignment];
NSDictionary* alignment_attributes =
@{NSParagraphStyleAttributeName : alignment};
base::scoped_nsobject<NSAttributedString> attr_string(
[[NSAttributedString alloc] initWithString:informative_text
attributes:alignment_attributes]);
[informative_text_field setAttributedStringValue:attr_string];
[informative_text_field setSelectable:NO];
}
}
- (void)setBlankIcon {
NSImage* image =
[[[NSImage alloc] initWithSize:NSMakeSize(1, 1)] autorelease];
[alert_ setIcon:image];
}
- (NSAlert*)alert {
return alert_;
}
- (void)addTextFieldWithPrompt:(NSString*)prompt {
DCHECK(!textField_);
textField_.reset(
[[NSTextField alloc] initWithFrame:NSMakeRect(0, 0, 300, 22)]);
[[textField_ cell] setLineBreakMode:NSLineBreakByTruncatingTail];
[[self alert] setAccessoryView:textField_];
[[alert_ window] setInitialFirstResponder:textField_];
[textField_ setStringValue:prompt];
}
// |contextInfo| is the JavaScriptAppModalDialogCocoa that owns us.
- (void)alertDidEnd:(NSAlert*)alert
returnCode:(int)returnCode
contextInfo:(void*)contextInfo {
switch (returnCode) {
case NSAlertFirstButtonReturn: // OK
alertBridge_->SendResultAndDestroy(AlertDisposition::PRIMARY_BUTTON);
break;
case NSAlertSecondButtonReturn: // Cancel
alertBridge_->SendResultAndDestroy(AlertDisposition::SECONDARY_BUTTON);
break;
case NSRunStoppedResponse: // Window was closed underneath us
alertBridge_->SendResultAndDestroy(AlertDisposition::CLOSE);
break;
default:
NOTREACHED();
}
}
- (void)showAlert {
DCHECK(alertBridge_);
alertBridge_->SetAlertHasShown();
NSAlert* alert = [self alert];
[alert layout];
[[alert window] recalculateKeyViewLoop];
[alert beginSheetModalForWindow:nil // nil here makes it app-modal
modalDelegate:self
didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:)
contextInfo:NULL];
}
- (void)closeWindow {
DCHECK(alertBridge_);
[NSApp endSheet:[[self alert] window]];
}
- (base::string16)input {
if (textField_)
return base::SysNSStringToUTF16([textField_ stringValue]);
return base::string16();
}
- (bool)shouldSuppress {
if ([[self alert] showsSuppressionButton])
return [[[self alert] suppressionButton] state] == NSOnState;
return false;
}
@end
namespace views_bridge_mac {
////////////////////////////////////////////////////////////////////////////////
// AlertBridge:
AlertBridge::AlertBridge(mojom::AlertBridgeRequest bridge_request)
: mojo_binding_(this), weak_factory_(this) {
mojo_binding_.Bind(std::move(bridge_request),
ui::WindowResizeHelperMac::Get()->task_runner());
mojo_binding_.set_connection_error_handler(base::BindOnce(
&AlertBridge::OnConnectionError, weak_factory_.GetWeakPtr()));
}
AlertBridge::~AlertBridge() {
[helper_ setAlertBridge:nil];
[NSObject cancelPreviousPerformRequestsWithTarget:helper_.get()];
}
void AlertBridge::OnConnectionError() {
// If the alert has been shown, then close the window, and |this| will delete
// itself after the window is closed. Otherwise, just delete |this|
// immediately.
if (alert_shown_)
[helper_ closeWindow];
else
delete this;
}
void AlertBridge::SendResultAndDestroy(AlertDisposition disposition) {
DCHECK(callback_);
std::move(callback_).Run(disposition, [helper_ input],
[helper_ shouldSuppress]);
delete this;
}
void AlertBridge::SetAlertHasShown() {
DCHECK(!alert_shown_);
alert_shown_ = true;
}
////////////////////////////////////////////////////////////////////////////////
// AlertBridge, mojo::AlertBridge:
void AlertBridge::Show(mojom::AlertBridgeInitParamsPtr params,
ShowCallback callback) {
callback_ = std::move(callback);
// Create a helper which will receive the sheet ended selector. It will
// delete itself when done.
helper_.reset([[AlertBridgeHelper alloc] init]);
[helper_ setAlertBridge:this];
[helper_ initAlert:params.get()];
// Dispatch the method to show the alert back to the top of the CFRunLoop.
// This fixes an interaction bug with NSSavePanel. http://crbug.com/375785
// When this object is destroyed, outstanding performSelector: requests
// should be cancelled.
[helper_.get() performSelector:@selector(showAlert)
withObject:nil
afterDelay:0];
}
} // namespace views_bridge_mac