Removed Alt-code mapping, using convenient identity relationship between keysyms and Alt-codes instead.

protocols/rdp/Makefile.am

@@ -43,8 +43,7 @@ lib_LTLIBRARIES = libguac-client-rdp.la
 
 libguac_client_rdp_la_SOURCES = src/client.c src/rdp_bitmap.c src/rdp_glyph.c src/rdp_pointer.c src/rdp_gdi.c src/guac_handlers.c \
 				 src/rdp_keymap.c \
-				 src/rdp_keymap_en_us.c \
-				 src/rdp_keymap_alt.c
+				 src/rdp_keymap_en_us.c
 
 libguac_client_rdp_la_LDFLAGS = -version-info 0:0:0
 

protocols/rdp/include/rdp_keymap.h

@@ -68,21 +68,6 @@ typedef struct guac_rdp_scancode_map {
 
 } guac_rdp_scancode_map;
 
-/**
- * Represents the Alt-code which types a given keysym. This is used as a
- * fallback mapping, should a particular keymap not support a certain keysym.
- *
- * See: http://en.wikipedia.org/wiki/Alt_code
- */
-typedef struct guac_rdp_altcode_map {
-
-    /**
-     * The 4-digit Alt-code which types this keysym.
-     */
-    const char* altcode;
-
-} guac_rdp_altcode_map;
-
 /**
  * Mapping from keysym to current state
  */
@@ -93,21 +78,11 @@ typedef int guac_rdp_keysym_state_map[256][256];
  */
 typedef guac_rdp_scancode_map guac_rdp_keysym_scancode_map[256][256];
 
-/**
- * Static mapping from keysyms to Alt-codes.
- */
-typedef guac_rdp_altcode_map guac_rdp_keysym_altcode_map[256][256];
-
 /**
  * Map of X11 keysyms to RDP scancodes (US English).
  */
 extern const guac_rdp_keysym_scancode_map guac_rdp_keysym_scancode_en_us;
 
-/**
- * Map of X11 keysyms to Windows Alt-codes.
- */
-extern const guac_rdp_keysym_altcode_map guac_rdp_keysym_altcode;
-
 /**
  * Simple macro for referencing the mapped value of an altcode or scancode for a given keysym.
  */

protocols/rdp/src/guac_handlers.c

@@ -56,7 +56,7 @@
 
 void __guac_rdp_update_keysyms(guac_client* client, const int* keysym_string, int from, int to);
 int __guac_rdp_send_keysym(guac_client* client, int keysym, int pressed);
-void __guac_rdp_send_altcode(guac_client* client, const char* altcode);
+void __guac_rdp_send_altcode(guac_client* client, int altcode);
 
 int rdp_guac_client_free_handler(guac_client* client) {
 
@@ -227,11 +227,12 @@ int rdp_guac_client_mouse_handler(guac_client* client, int x, int y, int mask) {
     return 0;
 }
 
-void __guac_rdp_send_altcode(guac_client* client, const char* altcode) {
+void __guac_rdp_send_altcode(guac_client* client, int altcode) {
 
     rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
     freerdp* rdp_inst = guac_client_data->rdp_inst;
     const guac_rdp_keysym_scancode_map* keysym_scancodes = guac_client_data->keysym_scancodes;
+    int i;
 
     /* Lookup scancode for Alt */
     int alt = GUAC_RDP_KEYSYM_LOOKUP(*keysym_scancodes, 0xFFE9 /* Alt_L */).scancode;
@@ -242,18 +243,22 @@ void __guac_rdp_send_altcode(guac_client* client, const char* altcode) {
     /* Press Alt */
     rdp_inst->input->KeyboardEvent(rdp_inst->input, KBD_FLAGS_DOWN, alt);
 
-    /* For each character in Alt-code ... */
-    while (*altcode != '\0') {
+    /* For each character in four-digit Alt-code ... */
+    for (i=0; i<4; i++) {
 
         /* Get scancode of keypad digit */
-        int scancode = GUAC_RDP_KEYSYM_LOOKUP(*keysym_scancodes, 0xFFB0 + (*altcode) - '0').scancode;
+        int scancode = GUAC_RDP_KEYSYM_LOOKUP(
+                *keysym_scancodes,
+                0xFFB0 + (altcode / 1000)
+        ).scancode;
 
         /* Press and release digit */
         rdp_inst->input->KeyboardEvent(rdp_inst->input, KBD_FLAGS_DOWN, scancode);
         rdp_inst->input->KeyboardEvent(rdp_inst->input, KBD_FLAGS_RELEASE, scancode);
 
-        /* Next character */
-        altcode++;
+        /* Shift digits left by one place */
+        altcode = (altcode * 10) % 10000;
+
     }
 
     /* Release Alt */
@@ -304,24 +309,21 @@ int __guac_rdp_send_keysym(guac_client* client, int keysym, int pressed) {
 
         }
 
-        /* If undefined, try to type using Alt-code */
-        else {
+        /* If undefined but has Alt-code, use Alt-Code */
+        else if (keysym <= 0xFF) {
 
-            const guac_rdp_altcode_map* altcode_map = &GUAC_RDP_KEYSYM_LOOKUP(guac_rdp_keysym_altcode, keysym);
-            if (altcode_map->altcode != NULL) {
+            /* NOTE: The Alt-codes are conveniently identical to keysyms. */
 
-                /* Only send Alt-code on press */
-                if (pressed)
-                    __guac_rdp_send_altcode(client, altcode_map->altcode);
-
-            }
-
-            /* If no defined Alt-code, log warning */
-            else
-                guac_client_log_info(client, "unmapped keysym: 0x%x", keysym);
+            /* Only send Alt-code on press */
+            if (pressed)
+                __guac_rdp_send_altcode(client, keysym);
 
         }
 
+        /* If no defined Alt-code, log warning */
+        else
+            guac_client_log_info(client, "unmapped keysym: 0x%x", keysym);
+
     }
 
     return 0;