/*

 * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.

 * Copyright (C) 2006, 2007 Vladimir Olexa (vladimir.olexa@gmail.com)

 *

 * 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. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "DebuggerClient.h"

#import "DebuggerApplication.h"

#import "DebuggerDocument.h"

#import <Carbon/Carbon.h>

#import <JavaScriptCore/JSContextRef.h>

#import <JavaScriptCore/JSRetainPtr.h>

#import <JavaScriptCore/JSStringRef.h>

#import <JavaScriptCore/JSStringRefCF.h>

#import <JavaScriptCore/RetainPtr.h>

static NSString *DebuggerConsoleToolbarItem = @"DebuggerConsoleToolbarItem";

static NSString *DebuggerContinueToolbarItem = @"DebuggerContinueToolbarItem";

static NSString *DebuggerPauseToolbarItem = @"DebuggerPauseToolbarItem";

static NSString *DebuggerStepIntoToolbarItem = @"DebuggerStepIntoToolbarItem";

static NSString *DebuggerStepOverToolbarItem = @"DebuggerStepOverToolbarItem";

static NSString *DebuggerStepOutToolbarItem = @"DebuggerStepOutToolbarItem";

@implementation DebuggerClient

+ (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector

{

    return NO;

}

+ (BOOL)isKeyExcludedFromWebScript:(const char *)name

{

    return NO;

}

+ (void)log:(NSString *)msg

{

    NSLog(@"%@", msg);

}

#pragma mark -

- (id)initWithServerName:(NSString *)serverName

{

    debuggerDocument = new DebuggerDocument(self);

    if ((self = [super init]))

        [self switchToServerNamed:serverName];

    return self;

}

- (void)dealloc

{

    delete debuggerDocument;

    [server release];

    [currentServerName release];

    [super dealloc];

}

#pragma mark -

#pragma mark Stack & Variables

- (WebScriptCallFrame *)currentFrame

{

    return currentFrame;

}

- (NSString *)currentFrameFunctionName

{

    return [currentFrame functionName];

}

- (NSArray *)webScriptAttributeKeysForScriptObject:(WebScriptObject *)object

{

    WebScriptObject *enumerateAttributes = [object evaluateWebScript:@"(function () { var result = new Array(); for (var x in this) { result.push(x); } return result; })"];

    NSMutableArray *result = [[NSMutableArray alloc] init];

    WebScriptObject *variables = [enumerateAttributes callWebScriptMethod:@"call" withArguments:[NSArray arrayWithObject:object]];

    unsigned length = [[variables valueForKey:@"length"] intValue];

    for (unsigned i = 0; i < length; i++) {

        NSString *key = [variables webScriptValueAtIndex:i];

        [result addObject:key];

    }

    [result sortUsingSelector:@selector(compare:)];

    return [result autorelease];

}

#pragma mark -

#pragma mark Pause & Step

- (void)pause

{

    if ([[(NSDistantObject *)server connectionForProxy] isValid])

        [server pause];

    [[NSApplication sharedApplication] activateIgnoringOtherApps:YES];

}

- (void)resume

{

    if ([[(NSDistantObject *)server connectionForProxy] isValid])

        [server resume];

}

- (void)stepInto

{

    if ([[(NSDistantObject *)server connectionForProxy] isValid])

        [server step];

}

#pragma mark -

#pragma mark Interface Actions

- (IBAction)pause:(id)sender

{

    DebuggerDocument::callGlobalFunction([[webView mainFrame] globalContext], "pause", 0, 0);

}

- (IBAction)resume:(id)sender

{

    DebuggerDocument::callGlobalFunction([[webView mainFrame] globalContext], "resume", 0, 0);

}

- (IBAction)stepInto:(id)sender

{

    DebuggerDocument::callGlobalFunction([[webView mainFrame] globalContext], "stepInto", 0, 0);

}

- (IBAction)stepOver:(id)sender

{

    DebuggerDocument::callGlobalFunction([[webView mainFrame] globalContext], "stepOver", 0, 0);

}

- (IBAction)stepOut:(id)sender

{

    DebuggerDocument::callGlobalFunction([[webView mainFrame] globalContext], "stepOut", 0, 0);

}

- (IBAction)showConsole:(id)sender

{

    DebuggerDocument::callGlobalFunction([[webView mainFrame] globalContext], "showConsoleWindow", 0, 0);

}

- (IBAction)closeCurrentFile:(id)sender

{

    DebuggerDocument::callGlobalFunction([[webView mainFrame] globalContext], "closeCurrentFile", 0, 0);

}

#pragma mark -

#pragma mark Window Controller Overrides

- (NSString *)windowNibName

{

    return @"Debugger";

}

- (void)windowDidLoad

{

    [super windowDidLoad];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationTerminating:) name:NSApplicationWillTerminateNotification object:nil];

    NSString *path = [[NSBundle mainBundle] pathForResource:@"debugger" ofType:@"html" inDirectory:nil];

    [[webView mainFrame] loadRequest:[[[NSURLRequest alloc] initWithURL:[NSURL fileURLWithPath:path]] autorelease]];

    NSToolbar *toolbar = [[NSToolbar alloc] initWithIdentifier:@"debugger"];

    [toolbar setDelegate:self];

    [toolbar setAllowsUserCustomization:YES];

    [toolbar setAutosavesConfiguration:YES];

    [[self window] setToolbar:toolbar];

    [toolbar release];

}

- (void)windowWillClose:(NSNotification *)notification

{

    [[webView windowScriptObject] removeWebScriptKey:@"DebuggerDocument"];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSApplicationWillTerminateNotification object:nil];

    [self switchToServerNamed:nil];

    [self autorelease]; // DebuggerApplication expects us to release on close

}

#pragma mark -

#pragma mark Connection Handling

- (void)switchToServerNamed:(NSString *)name

{

    if (server) {

        [[NSNotificationCenter defaultCenter] removeObserver:self name:NSConnectionDidDieNotification object:[(NSDistantObject *)server connectionForProxy]];

        if ([[(NSDistantObject *)server connectionForProxy] isValid]) {

            [server removeListener:self];

            [self resume];

        }

    }

    id old = server;

    server = ([name length] ? [[NSConnection rootProxyForConnectionWithRegisteredName:name host:nil] retain] : nil);

    [old release];

    old = currentServerName;

    currentServerName = [name copy];

    [old release];

    if (server) {

        @try {

            [(NSDistantObject *)server setProtocolForProxy:@protocol(WebScriptDebugServer)];

            [server addListener:self];

        } @catch (NSException *exception) {

            [currentServerName release];

            currentServerName = nil;

            [server release];

            server = nil;

        }

        if (server)

            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(serverConnectionDidDie:) name:NSConnectionDidDieNotification object:[(NSDistantObject *)server connectionForProxy]];  

    }

}

- (void)applicationTerminating:(NSNotification *)notifiction

{

    if (server && [[(NSDistantObject *)server connectionForProxy] isValid]) {

        [self switchToServerNamed:nil];

        // call the runloop for a while to make sure our removeListener: is sent to the server

        [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.25]];

    }

}

- (void)serverConnectionDidDie:(NSNotification *)notifiction

{

    [self switchToServerNamed:nil];

}

#pragma mark -

#pragma mark Toolbar Delegate

- (NSToolbarItem *)toolbar:(NSToolbar *)toolbar itemForItemIdentifier:(NSString *)itemIdentifier willBeInsertedIntoToolbar:(BOOL)flag

{

    if ([itemIdentifier isEqualToString:DebuggerContinueToolbarItem]) {

        NSToolbarItem *item = [[NSToolbarItem alloc] initWithItemIdentifier:itemIdentifier];

        [item setLabel:@"Continue"];

        [item setPaletteLabel:@"Continue"];

        [item setToolTip:@"Continue script execution"];

        [item setImage:[NSImage imageNamed:@"continue"]];

        [item setTarget:self];

        [item setAction:@selector(resume:)];

        return [item autorelease];

    } else if ([itemIdentifier isEqualToString:DebuggerConsoleToolbarItem]) {

        NSToolbarItem *item = [[NSToolbarItem alloc] initWithItemIdentifier:itemIdentifier];

        [item setLabel:@"Console"];

        [item setPaletteLabel:@"Console"];

        [item setToolTip:@"Console"];

        [item setImage:[NSImage imageNamed:@"console"]];

        [item setTarget:self];

        [item setAction:@selector(showConsole:)];

        return [item autorelease];

    } else if ([itemIdentifier isEqualToString:DebuggerPauseToolbarItem]) {

        NSToolbarItem *item = [[NSToolbarItem alloc] initWithItemIdentifier:itemIdentifier];

        [item setLabel:@"Pause"];

        [item setPaletteLabel:@"Pause"];

        [item setToolTip:@"Pause script execution"];

        [item setImage:[NSImage imageNamed:@"pause"]];

        [item setTarget:self];

        [item setAction:@selector(pause:)];

        return [item autorelease];

    } else if ([itemIdentifier isEqualToString:DebuggerStepIntoToolbarItem]) {

        NSToolbarItem *item = [[NSToolbarItem alloc] initWithItemIdentifier:itemIdentifier];

        [item setLabel:@"Step Into"];

        [item setPaletteLabel:@"Step Into"];

        [item setToolTip:@"Step into function call"];

        [item setImage:[NSImage imageNamed:@"step"]];

        [item setTarget:self];

        [item setAction:@selector(stepInto:)];

        return [item autorelease];

    } else if ([itemIdentifier isEqualToString:DebuggerStepOverToolbarItem]) {

        NSToolbarItem *item = [[NSToolbarItem alloc] initWithItemIdentifier:itemIdentifier];

        [item setLabel:@"Step Over"];

        [item setPaletteLabel:@"Step Over"];

        [item setToolTip:@"Step over function call"];

        [item setImage:[NSImage imageNamed:@"stepOver"]];

        [item setTarget:self];

        [item setAction:@selector(stepOver:)];

        return [item autorelease];

    } else if ([itemIdentifier isEqualToString:DebuggerStepOutToolbarItem]) {

        NSToolbarItem *item = [[NSToolbarItem alloc] initWithItemIdentifier:itemIdentifier];

        [item setLabel:@"Step Out"];

        [item setPaletteLabel:@"Step Over"];

        [item setToolTip:@"Step out of current function"];

        [item setImage:[NSImage imageNamed:@"stepOut"]];

        [item setTarget:self];

        [item setAction:@selector(stepOut:)];

        return [item autorelease];

    }

    return nil;

}

- (NSArray *)toolbarDefaultItemIdentifiers:(NSToolbar*)toolbar

{

    return [NSArray arrayWithObjects:DebuggerContinueToolbarItem, DebuggerPauseToolbarItem,

        NSToolbarSeparatorItemIdentifier, DebuggerStepIntoToolbarItem, DebuggerStepOutToolbarItem,

        DebuggerStepOverToolbarItem, NSToolbarFlexibleSpaceItemIdentifier, DebuggerConsoleToolbarItem, nil];

}

- (NSArray *)toolbarAllowedItemIdentifiers:(NSToolbar*)toolbar

{

    return [NSArray arrayWithObjects:DebuggerConsoleToolbarItem, DebuggerContinueToolbarItem, DebuggerPauseToolbarItem,

        DebuggerStepIntoToolbarItem, DebuggerStepOutToolbarItem, DebuggerStepOverToolbarItem, NSToolbarCustomizeToolbarItemIdentifier,

        NSToolbarFlexibleSpaceItemIdentifier, NSToolbarSpaceItemIdentifier, NSToolbarSeparatorItemIdentifier, nil];

}

- (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)interfaceItem

{

    SEL action = [interfaceItem action];

    if (action == @selector(pause:)) {

        if (!webViewLoaded)

            return NO;

        return !debuggerDocument->isPaused([[webView mainFrame] globalContext]);

    }

    if (action == @selector(resume:) ||

        action == @selector(stepOver:) ||

        action == @selector(stepOut:) ||

        action == @selector(stepInto:)) {

        if (!webViewLoaded)

            return YES;

        return debuggerDocument->isPaused([[webView mainFrame] globalContext]);

    }

    return YES;

}

#pragma mark -

#pragma mark WebView UI Delegate

- (WebView *)webView:(WebView *)sender createWebViewWithRequest:(NSURLRequest *)request

{

    WebView *newWebView = [[WebView alloc] initWithFrame:NSZeroRect frameName:nil groupName:nil];

    [newWebView setAutoresizingMask:(NSViewWidthSizable | NSViewHeightSizable)];

    [newWebView setUIDelegate:self];

    [newWebView setPolicyDelegate:self];

    [newWebView setFrameLoadDelegate:self];

    if (request)

        [[newWebView mainFrame] loadRequest:request];

    NSWindow *window = [[NSWindow alloc] initWithContentRect:NSZeroRect styleMask:(NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask | NSUnifiedTitleAndToolbarWindowMask) backing:NSBackingStoreBuffered defer:NO screen:[[webView window] screen]];

    [window setReleasedWhenClosed:YES];

    [newWebView setFrame:[[window contentView] frame]];

    [[window contentView] addSubview:newWebView];

    [newWebView release];

    return newWebView;

}

- (void)webViewShow:(WebView *)sender

{

    [[sender window] makeKeyAndOrderFront:sender];

}

- (BOOL)webViewAreToolbarsVisible:(WebView *)sender

{

    return [[[sender window] toolbar] isVisible];

}

- (void)webView:(WebView *)sender setToolbarsVisible:(BOOL)visible

{

    [[[sender window] toolbar] setVisible:visible];

}

- (void)webView:(WebView *)sender setResizable:(BOOL)resizable

{

    [[sender window] setShowsResizeIndicator:resizable];

    [[[sender window] standardWindowButton:NSWindowZoomButton] setEnabled:resizable];

}

- (void)webView:(WebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame

{

    NSRange range = [message rangeOfString:@"\t"];

    NSString *title = @"Alert";

    if (range.location != NSNotFound) {

        title = [message substringToIndex:range.location];

        message = [message substringFromIndex:(range.location + range.length)];

    }

    NSBeginInformationalAlertSheet(title, nil, nil, nil, [sender window], nil, NULL, NULL, NULL, message);

}

- (void)scriptConfirmSheetDidEnd:(NSWindow *)sheet returnCode:(int)returnCode contextInfo:(long *)contextInfo

{

    *contextInfo = returnCode;

}

- (BOOL)webView:(WebView *)sender runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame

{

    NSRange range = [message rangeOfString:@"\t"];

    NSString *title = @"Alert";

    if (range.location != NSNotFound) {

        title = [message substringToIndex:range.location];

        message = [message substringFromIndex:(range.location + range.length)];

    }

    long result = NSNotFound;

    NSBeginInformationalAlertSheet(title, nil, @"Cancel", nil, [sender window], self, @selector(scriptConfirmSheetDidEnd:returnCode:contextInfo:), NULL, &result, message);

    while (result == NSNotFound) {

        NSEvent *nextEvent = [[NSApplication sharedApplication] nextEventMatchingMask:NSAnyEventMask untilDate:[NSDate distantFuture] inMode:NSDefaultRunLoopMode dequeue:YES];

        [[NSApplication sharedApplication] sendEvent:nextEvent];

    }

    return result;

}

#pragma mark -

#pragma mark WebView Frame Load Delegate

- (void)webView:(WebView *)sender windowScriptObjectAvailable:(WebScriptObject *)windowScriptObject

{

    // note: this is the Debuggers's own WebView, not the one being debugged

    JSContextRef context = [[webView mainFrame] globalContext];

    JSObjectRef globalObject = JSContextGetGlobalObject(context);

    debuggerDocument->windowScriptObjectAvailable(context, globalObject);

}

- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame

{

    // note: this is the Debuggers's own WebView, not the one being debugged

    if ([[sender window] isEqual:[self window]])

        webViewLoaded = YES;

}

- (void)webView:(WebView *)sender didReceiveTitle:(NSString *)title forFrame:(WebFrame *)frame

{

    // note: this is the Debuggers's own WebViews, not the one being debugged

    if ([frame isEqual:[sender mainFrame]]) {

        NSDictionary *info = [[(DebuggerApplication *)[[NSApplication sharedApplication] delegate] knownServers] objectForKey:currentServerName];

        NSString *processName = [info objectForKey:WebScriptDebugServerProcessNameKey];

        if (info && [processName length]) {

            NSMutableString *newTitle = [[NSMutableString alloc] initWithString:processName];

            [newTitle appendString:@" - "];

            [newTitle appendString:title];

            [[sender window] setTitle:newTitle];

            [newTitle release];

        } else 

            [[sender window] setTitle:title];

    }

}

#pragma mark -

#pragma mark Debug Listener Callbacks

- (void)webView:(WebView *)view didLoadMainResourceForDataSource:(WebDataSource *)dataSource

{  

    NSString *documentSource = nil;

    id <WebDocumentRepresentation> rep = [dataSource representation];

    if ([rep canProvideDocumentSource])

        documentSource = [rep documentSource];

    if (!documentSource)

        return;

    JSRetainPtr<JSStringRef> documentSourceJS(Adopt, JSStringCreateWithCFString((CFStringRef)documentSource));     // We already checked for NULL

    NSString *url = [[[dataSource response] URL] absoluteString];

    JSRetainPtr<JSStringRef> urlJS(Adopt, JSStringCreateWithCFString(url ? (CFStringRef)url : CFSTR("")));

    DebuggerDocument::updateFileSource([[webView mainFrame] globalContext], documentSourceJS.get(), urlJS.get());

}

- (void)webView:(WebView *)view didParseSource:(NSString *)source baseLineNumber:(unsigned)baseLine fromURL:(NSURL *)url sourceId:(int)sid forWebFrame:(WebFrame *)webFrame

{

    if (!webViewLoaded)

        return;

    RetainPtr<NSString *>sourceCopy = [source copy];

    if (!sourceCopy.get())

        return;