[Qemu-devel] [PATCH] Add support for a Send Key menu.

* [Qemu-devel] [PATCH] Add support for a Send Key menu.
@ 2016-07-11 22:20 Programmingkid
  2016-07-11 22:28 ` Peter Maydell
  0 siblings, 1 reply; 5+ messages in thread
From: Programmingkid @ 2016-07-11 22:20 UTC (permalink / raw)
  To: qemu-devel qemu-devel; +Cc: Peter Maydell

Add a menu called "Send Key". It is populated with options the user supplies at
runtime. The option works like this: -sendkeymenu <title>:<key values>. The
title can be anything you want. The values are the hexadecimal values for the
keycodes. The title is added to the menu as an menu item. The keycodes are sent
to QEMU.

Example: -sendkeymenu Command-Option-Esc:0x37,0x3a,0x35:Command-Power:0x37,0x7f7f

Two menu items would be added to the "Send Key" menu with this example.

This feature could be used to send Control-Alt-Delete to a Windows guest. It can
also be used to send Command-Power keys to a Mac OS 9 guest to display Macsbugs. 
The user can decide what menu items to place in this menu. If the user doesn't
use this feature the "Send Key" menu is not displayed.

Signed-off-by: John Arbuckle <programmingkidx@gmail.com>
---
 ui/cocoa.m | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)

diff --git a/ui/cocoa.m b/ui/cocoa.m
index 36c6bf0..9fa9cc5 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -824,6 +824,7 @@ QemuCocoaView *cocoaView;
 - (void)changeDeviceMedia:(id)sender;
 - (BOOL)verifyQuit;
 - (void)openDocumentation:(NSString *)filename;
+- (IBAction)do_send_key_menu_item:(id)sender;
 @end
 
 @implementation QemuCocoaAppController
@@ -1138,8 +1139,110 @@ QemuCocoaView *cocoaView;
     }
 }
 
+/* The action method to the items in the Send Keys menu */
+- (IBAction)do_send_key_menu_item:(id)sender {
+    NSString *keys = [sender representedObject];
+    NSArray *key_array = [keys componentsSeparatedByString: @","];
+    #define array_size 0xff
+    int keydown_array[array_size] = {0};
+    int index, keycode;
+    NSString *hex_string;
+
+    for (index = 0; index < [key_array count]; index++) {
+        hex_string = [key_array objectAtIndex: index];
+        sscanf([hex_string cStringUsingEncoding: NSASCIIStringEncoding], "%x",
+               &keycode);
+        keycode = cocoa_keycode_to_qemu(keycode);
+        qemu_input_event_send_key_qcode(dcl->con, keycode, true);
+        keydown_array[keycode] = 1;
+    }
+
+    /* Send keyup event for all keys that were sent */
+    for (index = 0; index < array_size; index++) {
+        if (keydown_array[index] != 0) {
+            qemu_input_event_send_key_qcode(dcl->con, index, false);
+        }
+    }
+}
+
 @end
 
+/* Determines if '-sendkeymenu' is in the arguments sent to QEMU */
+static int send_key_support(void) {
+    int index;
+    for (index = 0; index < gArgc; index++) {
+        if (strcmp("-sendkeymenu", gArgv[index]) == 0) {
+            return true;
+        }
+    }
+    return false;
+}
+
+/* Remove one of the options from the global variable gArgv */
+static void remove_option(int index)
+{
+    if (index < 0) {
+        printf("Error: remove_option(): index less than zero: %d\n", index);
+        return;
+    } else if (index >= gArgc) {
+        printf("Error: remove_option(): index too big: %d\n", index);
+        return;
+    }
+    gArgc--;
+    /* copy everything from index + 1 to the end */
+    for (; index < gArgc; index++) {
+        gArgv[index] = gArgv[index+1];
+    }
+}
+
+/* Creates the Send Key menu and populates it */
+static void create_send_key_menu(void) {
+    NSMenu *menu;
+    menu = [[NSMenu alloc] initWithTitle:@"Send Key"];
+
+    /* Find the index of the sendkeymenu and its items */
+    int send_key_index = -1;
+    int index;
+    for (index = 0; index < gArgc; index++) {
+        if (strcmp("-sendkeymenu", gArgv[index]) == 0) {
+            send_key_index = index;
+            break;
+        }
+    }
+
+    /* if failed to find the -sendkeymenu argument */
+    if (send_key_index == -1) {
+        printf("Failed to find 'sendkeymenu' arguments\n");
+        exit(EXIT_FAILURE);
+    }
+
+    NSMenuItem *menu_item;
+    char *token;
+    token = strtok(gArgv[send_key_index+1], ":");
+
+    /* loop thru each set of keys */
+    while (token) {
+        menu_item = [[[NSMenuItem alloc] initWithTitle: [NSString stringWithCString: token encoding:NSASCIIStringEncoding]
+                                                action: @selector(do_send_key_menu_item:)
+                                         keyEquivalent: @""] autorelease];
+        [menu addItem: menu_item];
+        token = strtok(NULL, ":");
+
+        [menu_item setRepresentedObject: [NSString stringWithCString: token encoding: NSASCIIStringEncoding]];
+        token = strtok(NULL, ":");
+    }
+
+    /* Add the menu to QEMU's menubar */
+    menu_item = [[[NSMenuItem alloc] initWithTitle: @"Send Key"
+                                            action:nil
+                                     keyEquivalent:@""] autorelease];
+    [menu_item setSubmenu:menu];
+    [[NSApp mainMenu] addItem:menu_item];
+
+    /* Remove the -sendkeymenu and related options from the global variable */
+    remove_option(send_key_index);
+    remove_option(send_key_index);
+}
 
 int main (int argc, const char * argv[]) {
 
@@ -1212,6 +1315,11 @@ int main (int argc, const char * argv[]) {
     [menuItem setSubmenu:menu];
     [[NSApp mainMenu] addItem:menuItem];
 
+    // Send Key menu
+    if (send_key_support()) {
+        create_send_key_menu();
+    }
+
     // View menu
     menu = [[NSMenu alloc] initWithTitle:@"View"];
     [menu addItem: [[[NSMenuItem alloc] initWithTitle:@"Enter Fullscreen" action:@selector(doToggleFullScreen:) keyEquivalent:@"f"] autorelease]]; // Fullscreen
-- 
2.7.2

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