/*

 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#import <Cocoa/Cocoa.h>

#import <JavaNativeFoundation/JavaNativeFoundation.h>

#import "sun_lwawt_macosx_CPlatformWindow.h"

#import "com_apple_eawt_event_GestureHandler.h"

#import "com_apple_eawt_FullScreenHandler.h"

#import "ApplicationDelegate.h"

#import "AWTWindow.h"

#import "AWTView.h"

#import "GeomUtilities.h"

#import "ThreadUtilities.h"

#define MASK(KEY) \

    (sun_lwawt_macosx_CPlatformWindow_ ## KEY)

#define IS(BITS, KEY) \

    ((BITS & MASK(KEY)) != 0)

#define SET(BITS, KEY, VALUE) \

    BITS = VALUE ? BITS | MASK(KEY) : BITS & ~MASK(KEY)

static JNF_CLASS_CACHE(jc_CPlatformWindow, "sun/lwawt/macosx/CPlatformWindow");

// Cocoa windowDidBecomeKey/windowDidResignKey notifications

// doesn't provide information about "opposite" window, so we

// have to do a bit of tracking. This variable points to a window

// which had been the key window just before a new key window

// was set. It would be nil if the new key window isn't an AWT

// window or the app currently has no key window.

static AWTWindow* lastKeyWindow = nil;

// This variable contains coordinates of a window's top left

// which was positioned via java.awt.Window.setLocationByPlatform.

// It would be NSZeroPoint if 'Location by Platform' is not used.

static NSPoint lastTopLeftPoint;

// --------------------------------------------------------------

// NSWindow/NSPanel descendants implementation

#define AWT_NS_WINDOW_IMPLEMENTATION                            \

- (id) initWithDelegate:(AWTWindow *)delegate                   \

              frameRect:(NSRect)contectRect                     \

              styleMask:(NSUInteger)styleMask                   \

            contentView:(NSView *)view                          \

{                                                               \

    self = [super initWithContentRect:contectRect               \

                            styleMask:styleMask                 \

                              backing:NSBackingStoreBuffered    \

                                defer:NO];                      \

                                                                \

    if (self == nil) return nil;                                \

                                                                \

    [self setDelegate:delegate];                                \

    [self setContentView:view];                                 \

    [self setInitialFirstResponder:view];                       \

    [self setReleasedWhenClosed:NO];                            \

    [self setPreservesContentDuringLiveResize:YES];             \

                                                                \

    return self;                                                \

}                                                               \

                                                                \

/* NSWindow overrides */                                        \

- (BOOL) canBecomeKeyWindow {                                   \

    return [(AWTWindow*)[self delegate] canBecomeKeyWindow];    \

}                                                               \

                                                                \

- (BOOL) canBecomeMainWindow {                                  \

    return [(AWTWindow*)[self delegate] canBecomeMainWindow];   \

}                                                               \

                                                                \

- (BOOL) worksWhenModal {                                       \

    return [(AWTWindow*)[self delegate] worksWhenModal];        \

}                                                               \

                                                                \

- (void)sendEvent:(NSEvent *)event {                            \

    [(AWTWindow*)[self delegate] sendEvent:event];              \

    [super sendEvent:event];                                    \

}

@implementation AWTWindow_Normal

AWT_NS_WINDOW_IMPLEMENTATION

// Gesture support

- (void)postGesture:(NSEvent *)event as:(jint)type a:(jdouble)a b:(jdouble)b {

    AWT_ASSERT_APPKIT_THREAD;

    JNIEnv *env = [ThreadUtilities getJNIEnv];

    jobject platformWindow = [((AWTWindow *)self.delegate).javaPlatformWindow jObjectWithEnv:env];

    if (platformWindow != NULL) {

        // extract the target AWT Window object out of the CPlatformWindow

        static JNF_MEMBER_CACHE(jf_target, jc_CPlatformWindow, "target", "Ljava/awt/Window;");

        jobject awtWindow = JNFGetObjectField(env, platformWindow, jf_target);

        if (awtWindow != NULL) {

            // translate the point into Java coordinates

            NSPoint loc = [event locationInWindow];

            loc.y = [self frame].size.height - loc.y;

            // send up to the GestureHandler to recursively dispatch on the AWT event thread

            static JNF_CLASS_CACHE(jc_GestureHandler, "com/apple/eawt/event/GestureHandler");

            static JNF_STATIC_MEMBER_CACHE(sjm_handleGestureFromNative, jc_GestureHandler, "handleGestureFromNative", "(Ljava/awt/Window;IDDDD)V");

            JNFCallStaticVoidMethod(env, sjm_handleGestureFromNative, awtWindow, type, (jdouble)loc.x, (jdouble)loc.y, (jdouble)a, (jdouble)b);

            (*env)->DeleteLocalRef(env, awtWindow);

        }

        (*env)->DeleteLocalRef(env, platformWindow);

    }

}

- (void)beginGestureWithEvent:(NSEvent *)event {

    [self postGesture:event

                   as:com_apple_eawt_event_GestureHandler_PHASE

                    a:-1.0

                    b:0.0];

}

- (void)endGestureWithEvent:(NSEvent *)event {

    [self postGesture:event

                   as:com_apple_eawt_event_GestureHandler_PHASE

                    a:1.0

                    b:0.0];

}

- (void)magnifyWithEvent:(NSEvent *)event {

    [self postGesture:event

                   as:com_apple_eawt_event_GestureHandler_MAGNIFY

                    a:[event magnification]

                    b:0.0];

}

- (void)rotateWithEvent:(NSEvent *)event {

    [self postGesture:event

                   as:com_apple_eawt_event_GestureHandler_ROTATE

                    a:[event rotation]

                    b:0.0];

}

- (void)swipeWithEvent:(NSEvent *)event {

    [self postGesture:event

                   as:com_apple_eawt_event_GestureHandler_SWIPE

                    a:[event deltaX]

                    b:[event deltaY]];

}

@end

@implementation AWTWindow_Panel

AWT_NS_WINDOW_IMPLEMENTATION

@end

// END of NSWindow/NSPanel descendants implementation

// --------------------------------------------------------------

@implementation AWTWindow

@synthesize nsWindow;

@synthesize javaPlatformWindow;

@synthesize javaMenuBar;

@synthesize javaMinSize;

@synthesize javaMaxSize;

@synthesize styleBits;

@synthesize isEnabled;

@synthesize ownerWindow;

@synthesize preFullScreenLevel;

@synthesize standardFrame;

@synthesize isMinimizing;

- (void) updateMinMaxSize:(BOOL)resizable {

    if (resizable) {

        [self.nsWindow setMinSize:self.javaMinSize];

        [self.nsWindow setMaxSize:self.javaMaxSize];

    } else {

        NSRect currentFrame = [self.nsWindow frame];

        [self.nsWindow setMinSize:currentFrame.size];

        [self.nsWindow setMaxSize:currentFrame.size];

    }

}

// creates a new NSWindow style mask based on the _STYLE_PROP_BITMASK bits

+ (NSUInteger) styleMaskForStyleBits:(jint)styleBits {

    NSUInteger type = 0;

    if (IS(styleBits, DECORATED)) {

        type |= NSTitledWindowMask;

        if (IS(styleBits, CLOSEABLE))   type |= NSClosableWindowMask;

        if (IS(styleBits, MINIMIZABLE)) type |= NSMiniaturizableWindowMask;

        if (IS(styleBits, RESIZABLE))   type |= NSResizableWindowMask;

    } else {

        type |= NSBorderlessWindowMask;

    }

    if (IS(styleBits, TEXTURED))      type |= NSTexturedBackgroundWindowMask;

    if (IS(styleBits, UNIFIED))       type |= NSUnifiedTitleAndToolbarWindowMask;

    if (IS(styleBits, UTILITY))       type |= NSUtilityWindowMask;

    if (IS(styleBits, HUD))           type |= NSHUDWindowMask;

    if (IS(styleBits, SHEET))         type |= NSDocModalWindowMask;

    if (IS(styleBits, NONACTIVATING)) type |= NSNonactivatingPanelMask;

    return type;

}

// updates _METHOD_PROP_BITMASK based properties on the window

- (void) setPropertiesForStyleBits:(jint)bits mask:(jint)mask {

    if (IS(mask, RESIZABLE)) {

        BOOL resizable = IS(bits, RESIZABLE);

        [self updateMinMaxSize:resizable];

        [self.nsWindow setShowsResizeIndicator:resizable];

        // Zoom button should be disabled, if the window is not resizable,

        // otherwise button should be restored to initial state.

        BOOL zoom = resizable && IS(bits, ZOOMABLE);

        [[self.nsWindow standardWindowButton:NSWindowZoomButton] setEnabled:zoom];

    }

    if (IS(mask, HAS_SHADOW)) {

        [self.nsWindow setHasShadow:IS(bits, HAS_SHADOW)];

    }

    if (IS(mask, ZOOMABLE)) {

        [[self.nsWindow standardWindowButton:NSWindowZoomButton] setEnabled:IS(bits, ZOOMABLE)];

    }

    if (IS(mask, ALWAYS_ON_TOP)) {

        [self.nsWindow setLevel:IS(bits, ALWAYS_ON_TOP) ? NSFloatingWindowLevel : NSNormalWindowLevel];

    }

    if (IS(mask, HIDES_ON_DEACTIVATE)) {

        [self.nsWindow setHidesOnDeactivate:IS(bits, HIDES_ON_DEACTIVATE)];

    }

    if (IS(mask, DRAGGABLE_BACKGROUND)) {

        [self.nsWindow setMovableByWindowBackground:IS(bits, DRAGGABLE_BACKGROUND)];

    }

    if (IS(mask, DOCUMENT_MODIFIED)) {

        [self.nsWindow setDocumentEdited:IS(bits, DOCUMENT_MODIFIED)];

    }

    if (IS(mask, FULLSCREENABLE) && [self.nsWindow respondsToSelector:@selector(toggleFullScreen:)]) {

        if (IS(bits, FULLSCREENABLE)) {

            [self.nsWindow setCollectionBehavior:(1 << 7) /*NSWindowCollectionBehaviorFullScreenPrimary*/];

        } else {

            [self.nsWindow setCollectionBehavior:NSWindowCollectionBehaviorDefault];

        }

    }

}

- (id) initWithPlatformWindow:(JNFWeakJObjectWrapper *)platformWindow

                  ownerWindow:owner

                    styleBits:(jint)bits

                    frameRect:(NSRect)rect

                  contentView:(NSView *)view

{

AWT_ASSERT_APPKIT_THREAD;

    NSUInteger styleMask = [AWTWindow styleMaskForStyleBits:bits];

    NSRect contentRect = rect; //[NSWindow contentRectForFrameRect:rect styleMask:styleMask];

    if (contentRect.size.width <= 0.0) {

        contentRect.size.width = 1.0;

    }

    if (contentRect.size.height <= 0.0) {

        contentRect.size.height = 1.0;

    }

    self = [super init];

    if (self == nil) return nil; // no hope

    if (IS(bits, UTILITY) ||

        IS(bits, NONACTIVATING) ||

        IS(bits, HUD) ||

        IS(bits, HIDES_ON_DEACTIVATE))

    {

        self.nsWindow = [[AWTWindow_Panel alloc] initWithDelegate:self

                            frameRect:contentRect

                            styleMask:styleMask

                          contentView:view];

    }

    else

    {

        // These windows will appear in the window list in the dock icon menu

        self.nsWindow = [[AWTWindow_Normal alloc] initWithDelegate:self

                            frameRect:contentRect

                            styleMask:styleMask

                          contentView:view];

    }

    if (self.nsWindow == nil) return nil; // no hope either

    [self.nsWindow release]; // the property retains the object already

    self.isEnabled = YES;

    self.isMinimizing = NO;

    self.javaPlatformWindow = platformWindow;

    self.styleBits = bits;

    self.ownerWindow = owner;

    [self setPropertiesForStyleBits:styleBits mask:MASK(_METHOD_PROP_BITMASK)];

    if (IS(self.styleBits, IS_POPUP)) {

        [self.nsWindow setCollectionBehavior:(1 << 8) /*NSWindowCollectionBehaviorFullScreenAuxiliary*/];

    }

    return self;

}

+ (BOOL) isAWTWindow:(NSWindow *)window {

    return [window isKindOfClass: [AWTWindow_Panel class]] || [window isKindOfClass: [AWTWindow_Normal class]];

}

// returns id for the topmost window under mouse

+ (NSInteger) getTopmostWindowUnderMouseID {

    NSInteger result = -1;

    NSRect screenRect = [[NSScreen mainScreen] frame];

    NSPoint nsMouseLocation = [NSEvent mouseLocation];

    CGPoint cgMouseLocation = CGPointMake(nsMouseLocation.x, screenRect.size.height - nsMouseLocation.y);

    NSMutableArray *windows = (NSMutableArray *)CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly | kCGWindowListExcludeDesktopElements, kCGNullWindowID);

    for (NSDictionary *window in windows) {

        NSInteger layer = [[window objectForKey:(id)kCGWindowLayer] integerValue];

        if (layer == 0) {

            CGRect rect;

            CGRectMakeWithDictionaryRepresentation((CFDictionaryRef)[window objectForKey:(id)kCGWindowBounds], &rect);

            if (CGRectContainsPoint(rect, cgMouseLocation)) {

                result = [[window objectForKey:(id)kCGWindowNumber] integerValue];

                break;

            }

        }

    }

    [windows release];

    return result;

}

// checks that this window is under the mouse cursor and this point is not overlapped by others windows

- (BOOL) isTopmostWindowUnderMouse {

    return [self.nsWindow windowNumber] == [AWTWindow getTopmostWindowUnderMouseID];

}

+ (AWTWindow *) getTopmostWindowUnderMouse {

    NSEnumerator *windowEnumerator = [[NSApp windows] objectEnumerator];

    NSWindow *window;

    NSInteger topmostWindowUnderMouseID = [AWTWindow getTopmostWindowUnderMouseID];

    while ((window = [windowEnumerator nextObject]) != nil) {

        if ([window windowNumber] == topmostWindowUnderMouseID) {

            BOOL isAWTWindow = [AWTWindow isAWTWindow: window];

            return isAWTWindow ? (AWTWindow *) [window delegate] : nil;

        }

    }

    return nil;

}

+ (void) synthesizeMouseEnteredExitedEvents:(NSWindow*)window withType:(NSEventType)eventType {

    NSPoint screenLocation = [NSEvent mouseLocation];

    NSPoint windowLocation = [window convertScreenToBase: screenLocation];

    int modifierFlags = (eventType == NSMouseEntered) ? NSMouseEnteredMask : NSMouseExitedMask;

    NSEvent *mouseEvent = [NSEvent enterExitEventWithType: eventType

                                                 location: windowLocation

                                            modifierFlags: modifierFlags

                                                timestamp: 0

                                             windowNumber: [window windowNumber]

                                                  context: nil

                                              eventNumber: 0

                                           trackingNumber: 0

                                                 userData: nil

                           ];

    [[window contentView] deliverJavaMouseEvent: mouseEvent];

}

+ (void) synthesizeMouseEnteredExitedEventsForAllWindows {

    NSInteger topmostWindowUnderMouseID = [AWTWindow getTopmostWindowUnderMouseID];

    NSArray *windows = [NSApp windows];

    NSWindow *window;

    NSEnumerator *windowEnumerator = [windows objectEnumerator];

    while ((window = [windowEnumerator nextObject]) != nil) {

        if ([AWTWindow isAWTWindow: window]) {

            BOOL isUnderMouse = ([window windowNumber] == topmostWindowUnderMouseID);

            BOOL mouseIsOver = [[window contentView] mouseIsOver];

            if (isUnderMouse && !mouseIsOver) {

                [AWTWindow synthesizeMouseEnteredExitedEvents:window withType:NSMouseEntered];

            } else if (!isUnderMouse && mouseIsOver) {

                [AWTWindow synthesizeMouseEnteredExitedEvents:window withType:NSMouseExited];

            }

        }

    }

}

+ (NSNumber *) getNSWindowDisplayID_AppKitThread:(NSWindow *)window {

    AWT_ASSERT_APPKIT_THREAD;

    NSScreen *screen = [window screen];

    NSDictionary *deviceDescription = [screen deviceDescription];

    return [deviceDescription objectForKey:@"NSScreenNumber"];

}

- (void) dealloc {

AWT_ASSERT_APPKIT_THREAD;

    JNIEnv *env = [ThreadUtilities getJNIEnvUncached];

    [self.javaPlatformWindow setJObject:nil withEnv:env];

    self.nsWindow = nil;

    self.ownerWindow = nil;

    [super dealloc];

}

// Tests whether window is blocked by modal dialog/window

- (BOOL) isBlocked {

    BOOL isBlocked = NO;

    JNIEnv *env = [ThreadUtilities getJNIEnv];

    jobject platformWindow = [self.javaPlatformWindow jObjectWithEnv:env];

    if (platformWindow != NULL) {

        static JNF_MEMBER_CACHE(jm_isBlocked, jc_CPlatformWindow, "isBlocked", "()Z");

        isBlocked = JNFCallBooleanMethod(env, platformWindow, jm_isBlocked) == JNI_TRUE ? YES : NO;

        (*env)->DeleteLocalRef(env, platformWindow);

    }

    return isBlocked;

}

// Tests whether the corresponding Java platform window is visible or not

+ (BOOL) isJavaPlatformWindowVisible:(NSWindow *)window {

    BOOL isVisible = NO;

    if ([AWTWindow isAWTWindow:window] && [window delegate] != nil) {

        AWTWindow *awtWindow = (AWTWindow *)[window delegate];

        [AWTToolkit eventCountPlusPlus];

        JNIEnv *env = [ThreadUtilities getJNIEnv];

        jobject platformWindow = [awtWindow.javaPlatformWindow jObjectWithEnv:env];

        if (platformWindow != NULL) {

            static JNF_MEMBER_CACHE(jm_isVisible, jc_CPlatformWindow, "isVisible", "()Z");

            isVisible = JNFCallBooleanMethod(env, platformWindow, jm_isVisible) == JNI_TRUE ? YES : NO;

            (*env)->DeleteLocalRef(env, platformWindow);

        }

    }

    return isVisible;

}

// Orders window's childs based on the current focus state

- (void) orderChildWindows:(BOOL)focus {

AWT_ASSERT_APPKIT_THREAD;

    if (self.isMinimizing || [self isBlocked]) {

        // Do not perform any ordering, if iconify is in progress

        // or the window is blocked by a modal window

        return;

    }

    NSEnumerator *windowEnumerator = [[NSApp windows]objectEnumerator];

    NSWindow *window;

    while ((window = [windowEnumerator nextObject]) != nil) {

        if ([AWTWindow isJavaPlatformWindowVisible:window]) {

            AWTWindow *awtWindow = (AWTWindow *)[window delegate];

            AWTWindow *owner = awtWindow.ownerWindow;

            if (IS(awtWindow.styleBits, ALWAYS_ON_TOP)) {

                // Do not order 'always on top' windows

                continue;

            }

            while (awtWindow.ownerWindow != nil) {

                if (awtWindow.ownerWindow == self) {

                    if (focus) {

                        // Move the childWindow to floating level

                        // so it will appear in front of its

                        // parent which owns the focus

                        [window setLevel:NSFloatingWindowLevel];

                    } else {

                        // Focus owner has changed, move the childWindow

                        // back to normal window level