[v2] Machine menu patch for Mac OS X

diff --git a/ui/cocoa.m b/ui/cocoa.m
index d37c29b..31a2043 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -29,6 +29,8 @@ 
 #include "ui/console.h"
 #include "ui/input.h"
 #include "sysemu/sysemu.h"
+#include "qmp-commands.h"
+#include "sysemu/blockdev.h"
 
 #ifndef MAC_OS_X_VERSION_10_4
 #define MAC_OS_X_VERSION_10_4 1040
@@ -64,6 +66,9 @@  static int last_buttons;
 
 int gArgc;
 char **gArgv;
+#define MAX_DEVICE_NAME_SIZE 10
+char floppy_drive_name[MAX_DEVICE_NAME_SIZE], cdrom_drive_name[MAX_DEVICE_NAME_SIZE];
+NSTextField * pause_label;
 
 // keymap conversion
 int keymap[] =
@@ -239,7 +244,95 @@  static int cocoa_keycode_to_qemu(int keycode)
     return keymap[keycode];
 }
 
+/* Handles any errors that happen with a device transaction */
+static void handleAnyDeviceErrors(Error * err)
+{
+    if (err) {
+        NSRunAlertPanel(@"Alert", [NSString stringWithCString: error_get_pretty(err)], @"OK", nil, nil);
+        error_free(err);
+    }
+}
+
+/*
+Determine if the current emulator has the specified device.
+device_name: the name of the device you want: floppy, cd
+official_name: QEMU's name for the device: floppy0, ide-cd0
+*/
+static bool emulatorHasDevice(char * device_name, char * official_name)
+{
+    BlockInfoList * block_device_data;
+    block_device_data = qmp_query_block(false);
+    if(block_device_data == NULL) {
+        return false;
+    }
+    while(block_device_data->next != NULL) {
+        /* If we found the device */
+        if (strstr(block_device_data->value->device, device_name)) {
+            strcpy(official_name, block_device_data->value->device);
+            qapi_free_BlockInfoList(block_device_data);
+            return true;
+        }
+        block_device_data = block_device_data->next;
+    }
+    return false;
+}
+
+/* Determine if the current emulator has a floppy drive */
+static bool emulatorHasFloppy()
+{
+    if (emulatorHasDevice("floppy", floppy_drive_name)) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+/* Determine if the current emulator has a CDROM drive */
+static bool emulatorHasCDROM()
+{
+    if (emulatorHasDevice("cd", cdrom_drive_name)) {
+        return true;
+    } else {
+        return false;
+    }
+}
 
+/* Adds the Machine menu to the menu bar. */
+/* Has to be added separately because QEMU needs
+   to be running to determine used devices.
+*/
+static void createMachineMenu()
+{
+    NSMenu * menu;
+    NSMenuItem * menuItem;
+
+    // Machine menu
+     menu = [[NSMenu alloc] initWithTitle: @"Machine"];
+    [menu setAutoenablesItems: NO];
+    [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Pause" action: @selector(pauseQemu:) keyEquivalent: @""] autorelease]];
+    [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Resume" action: @selector(resumeQemu:) keyEquivalent: @""] autorelease]];
+
+    if(emulatorHasFloppy() || emulatorHasCDROM()) {
+        [menu addItem: [NSMenuItem separatorItem]];
+    }
+
+    if (emulatorHasFloppy()) {
+        [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Eject Floppy" action: @selector(ejectFloppy:) keyEquivalent: @""] autorelease]];
+        [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Change Floppy..." action: @selector(changeFloppy:) keyEquivalent: @""] autorelease]];
+    }
+    if (emulatorHasCDROM()) {
+        [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Eject cdrom" action: @selector(ejectCdrom:) keyEquivalent: @""] autorelease]];
+        [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Use cdrom image..." action: @selector(changeCdrom:) keyEquivalent: @""] autorelease]];
+        [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Use real cdrom drive" action: @selector(useRealCdrom:) keyEquivalent: @""] autorelease]];
+    }
+    [menu addItem: [NSMenuItem separatorItem]];
+    [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Reset" action: @selector(restartQemu:) keyEquivalent: @""] autorelease]];
+    [menu addItem: [[[NSMenuItem alloc] initWithTitle: @"Power Down" action: @selector(powerDown:) keyEquivalent: @""] autorelease]];
+    menuItem = [[[NSMenuItem alloc] initWithTitle: @"Machine" action:nil keyEquivalent:@""] autorelease];
+    [menuItem setSubmenu:menu];
+    [[NSApp mainMenu] insertItem: menuItem atIndex: 2]; /* Insert after View menu */
+    [[menu itemWithTitle: @"Resume"] setEnabled: NO];
+}
 
 /*
  ------------------------------------------------------
@@ -801,6 +894,17 @@  QemuCocoaView *cocoaView;
 - (void)toggleFullScreen:(id)sender;
 - (void)showQEMUDoc:(id)sender;
 - (void)showQEMUTec:(id)sender;
+- (void)pauseQemu:(id)sender;
+- (void)ejectFloppy:(id)sender;
+- (void)ejectCdrom:(id)sender;
+- (void)changeCdrom:(id)sender;
+- (void)changeFloppy:(id)sender;
+- (void)restartQemu:(id)sender;
+- (void)useRealCdrom:(id)sender;
+- (void)verifyQuit:(id)sender;
+- (void)powerDown:(id)sender;
+- (void)displayPause;
+- (void)removePause;
 @end
 
 @implementation QemuCocoaAppController
@@ -833,6 +937,21 @@  QemuCocoaView *cocoaView;
         [normalWindow makeKeyAndOrderFront:self];
         [normalWindow center];
 
+        /* Used for displaying pause on the screen */
+        pause_label = [NSTextField new];
+        [pause_label setBezeled:NO];
+        [pause_label setDrawsBackground:NO];
+        [pause_label setEditable:NO];
+        [pause_label setSelectable:NO];
+        [pause_label setStringValue: @"Paused"];
+        [pause_label setFont: [NSFont fontWithName: @"Helvetica" size: 90]];
+        [pause_label setTextColor: [NSColor redColor]];
+        [pause_label sizeToFit];
+
+        /* Verify with the user before quitting QEMU */
+        NSButton *closeButton = [normalWindow standardWindowButton:NSWindowCloseButton];
+        [closeButton setTarget: self];
+        [closeButton setAction: @selector(verifyQuit:)];
     }
     return self;
 }
@@ -943,6 +1062,119 @@  QemuCocoaView *cocoaView;
     [[NSWorkspace sharedWorkspace] openFile:[NSString stringWithFormat:@"%@/../doc/qemu/qemu-tech.html",
         [[NSBundle mainBundle] resourcePath]] withApplication:@"Help Viewer"];
 }
+
+/* Pause the guest */
+- (void)pauseQemu:(id)sender
+{
+    qmp_stop(NULL);
+    [sender setEnabled: NO];
+    [[[sender menu] itemWithTitle: @"Resume"] setEnabled: YES];
+    [self displayPause];
+}
+
+/* Resume running the guest operating system */
+- (void)resumeQemu: (id) sender
+{
+    qmp_cont(NULL);
+    [sender setEnabled: NO];
+    [[[sender menu] itemWithTitle: @"Pause"] setEnabled: YES];
+    [self removePause];
+}
+
+/* Eject the floppy0 disk */
+- (void)ejectFloppy:(id)sender
+{
+    Error *err = NULL;
+    qmp_eject(floppy_drive_name, false, false, &err);
+    handleAnyDeviceErrors(err);
+}
+
+/* Displays a dialog box asking the user to select a floppy image to load */
+- (void)changeFloppy:(id)sender
+{
+    NSOpenPanel * open_panel;
+    open_panel = [NSOpenPanel openPanel];
+    [open_panel setCanChooseFiles: YES];
+    [open_panel setAllowsMultipleSelection: NO];
+    if([open_panel runModalForDirectory: nil file: nil] == NSOKButton) {
+        Error *err = NULL;
+        NSString * file = [[open_panel filenames] objectAtIndex: 0];
+        qmp_change_blockdev(floppy_drive_name, [file cString], "raw", &err);
+        handleAnyDeviceErrors(err);
+    }
+}
+
+// Ejects the cdrom
+- (void)ejectCdrom:(id)sender
+{
+    Error *err = NULL;
+    qmp_eject(cdrom_drive_name, false, false, &err);
+    handleAnyDeviceErrors(err);
+}
+
+/* Displays a dialog box asking the user to select a CD image to load */
+- (void)changeCdrom:(id)sender
+{
+    NSOpenPanel * open_panel;
+    open_panel = [NSOpenPanel openPanel];
+    [open_panel setCanChooseFiles: YES];
+    [open_panel setAllowsMultipleSelection: NO];
+    if([open_panel runModalForDirectory: nil file: nil] == NSOKButton) {
+        NSString * file = [[open_panel filenames] objectAtIndex: 0];
+        Error *err = NULL;
+        qmp_change_blockdev(cdrom_drive_name, [file cString], "raw", &err);
+        handleAnyDeviceErrors(err);
+    }
+}
+
+/* Restarts QEMU */
+- (void)restartQemu:(id)sender
+{
+    qemu_system_reset_request();
+}
+
+/* Switches QEMU to use the real cdrom drive */
+- (void)useRealCdrom:(id)sender
+{
+    Error *err = NULL;
+    qmp_change_blockdev(cdrom_drive_name, "/dev/cdrom", "raw", &err);
+    handleAnyDeviceErrors(err);
+}
+
+/* Verifies if the user really wants to quit */
+- (void)verifyQuit:(id)sender
+{
+    NSInteger response;
+    response = NSRunAlertPanel(@"Quit?", @"Are you sure you want to quit?", @"Cancel", @"Quit", nil);
+    if(response == NSAlertAlternateReturn)
+        qmp_quit(NULL);
+}
+
+/* Powers down the emulator */
+- (void)powerDown:(id)sender
+{
+    qmp_system_powerdown(NULL);
+}
+
+/* Displays the word pause on the screen */
+- (void)displayPause
+{
+    /* Coordinates have to be calculated each time because the window can change its size */
+    int xCoord, yCoord, width, height;
+    xCoord = ([normalWindow frame].size.width - [pause_label frame].size.width)/2;
+    yCoord = [normalWindow frame].size.height - [pause_label frame].size.height - ([pause_label frame].size.height * .5);
+    width = [pause_label frame].size.width;
+    height = [pause_label frame].size.height;
+    [pause_label setFrame: NSMakeRect(xCoord, yCoord, width, height)];
+    [cocoaView addSubview: pause_label];
+}
+
+/* Removes the word pause from the screen */
+- (void)removePause
+{
+    [pause_label removeFromSuperview];
+}
+
 @end
 
 
@@ -997,7 +1229,7 @@  int main (int argc, const char * argv[]) {
     [menuItem setKeyEquivalentModifierMask:(NSAlternateKeyMask|NSCommandKeyMask)];
     [menu addItemWithTitle:@"Show All" action:@selector(unhideAllApplications:) keyEquivalent:@""]; // Show All
     [menu addItem:[NSMenuItem separatorItem]]; //Separator
-    [menu addItemWithTitle:@"Quit QEMU" action:@selector(terminate:) keyEquivalent:@"q"];
+    [menu addItemWithTitle:@"Quit QEMU" action:@selector(verifyQuit:) keyEquivalent:@"q"];
     menuItem = [[NSMenuItem alloc] initWithTitle:@"Apple" action:nil keyEquivalent:@""];
     [menuItem setSubmenu:menu];
     [[NSApp mainMenu] addItem:menuItem];
@@ -1128,4 +1360,7 @@  void cocoa_display_init(DisplayState *ds, int full_screen)
 
     // register cleanup function
     atexit(cocoa_cleanup);
+
+    /* Creates and adds the Machine menu to the menubar */
+    createMachineMenu();
 }