curses: support wide input

This makes use of wide curses functions instead of 8bit functions. This
allows to type e.g. accented letters.

Unfortunately, key codes are then returned with values that could be
confused with wide characters by ncurses, so we need to add a maybe_keycode
variable to know whether the returned value is a key code or a character
(curses with wide support), or possibly both (curses without wide support).

The translation tables thus also need to be separated into key code
translation and character translation.  The curses2foo helper makes it easier
to use them.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Message-id: 20190304210532.7840-1-samuel.thibault@ens-lyon.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 65 insertions, 48 deletions

diff --git a/ui/curses_keys.h b/ui/curses_keys.h
index e9195a1671..71e04acdc7 100644
--- a/ui/curses_keys.h
+++ b/ui/curses_keys.h
@@ -49,22 +49,28 @@
 /* curses won't detect a Control + Alt + 1, so use Alt + 1 */
 #define QEMU_KEY_CONSOLE0   (2 | ALT)   /* (curses2keycode['1'] | ALT) */
 
+#define CURSES_CHARS        0x100       /* Support latin1 only */
 #define CURSES_KEYS         KEY_MAX     /* KEY_MAX defined in <curses.h> */
 
-static const int curses2keysym[CURSES_KEYS] = {
-    [0 ... (CURSES_KEYS - 1)] = -1,
+static const int _curses2keysym[CURSES_CHARS] = {
+    [0 ... (CURSES_CHARS - 1)] = -1,
 
     [0x7f] = KEY_BACKSPACE,
     ['\r'] = KEY_ENTER,
     ['\n'] = KEY_ENTER,
     [27] = 27,
+};
+
+static const int _curseskey2keysym[CURSES_KEYS] = {
+    [0 ... (CURSES_KEYS - 1)] = -1,
+
     [KEY_BTAB] = '\t' | KEYSYM_SHIFT,
     [KEY_SPREVIOUS] = KEY_PPAGE | KEYSYM_SHIFT,
     [KEY_SNEXT] = KEY_NPAGE | KEYSYM_SHIFT,
 };
 
-static const int curses2keycode[CURSES_KEYS] = {
-    [0 ... (CURSES_KEYS - 1)] = -1,
+static const int _curses2keycode[CURSES_CHARS] = {
+    [0 ... (CURSES_CHARS - 1)] = -1,
 
     [0x01b] = 1, /* Escape */
     ['1'] = 2,
@@ -80,7 +86,6 @@ static const int curses2keycode[CURSES_KEYS] = {
     ['-'] = 12,
     ['='] = 13,
     [0x07f] = 14, /* Backspace */
-    [KEY_BACKSPACE] = 14, /* Backspace */
 
     ['\t'] = 15, /* Tab */
     ['q'] = 16,
@@ -97,7 +102,6 @@ static const int curses2keycode[CURSES_KEYS] = {
     [']'] = 27,
     ['\n'] = 28, /* Return */
     ['\r'] = 28, /* Return */
-    [KEY_ENTER] = 28, /* Return */
 
     ['a'] = 30,
     ['s'] = 31,
@@ -126,33 +130,6 @@ static const int curses2keycode[CURSES_KEYS] = {
 
     [' '] = 57,
 
-    [KEY_F(1)] = 59, /* Function Key 1 */
-    [KEY_F(2)] = 60, /* Function Key 2 */
-    [KEY_F(3)] = 61, /* Function Key 3 */
-    [KEY_F(4)] = 62, /* Function Key 4 */
-    [KEY_F(5)] = 63, /* Function Key 5 */
-    [KEY_F(6)] = 64, /* Function Key 6 */
-    [KEY_F(7)] = 65, /* Function Key 7 */
-    [KEY_F(8)] = 66, /* Function Key 8 */
-    [KEY_F(9)] = 67, /* Function Key 9 */
-    [KEY_F(10)] = 68, /* Function Key 10 */
-    [KEY_F(11)] = 87, /* Function Key 11 */
-    [KEY_F(12)] = 88, /* Function Key 12 */
-
-    [KEY_HOME] = 71 | GREY, /* Home */
-    [KEY_UP] = 72 | GREY, /* Up Arrow */
-    [KEY_PPAGE] = 73 | GREY, /* Page Up */
-    [KEY_LEFT] = 75 | GREY, /* Left Arrow */
-    [KEY_RIGHT] = 77 | GREY, /* Right Arrow */
-    [KEY_END] = 79 | GREY, /* End */
-    [KEY_DOWN] = 80 | GREY, /* Down Arrow */
-    [KEY_NPAGE] = 81 | GREY, /* Page Down */
-    [KEY_IC] = 82 | GREY, /* Insert */
-    [KEY_DC] = 83 | GREY, /* Delete */
-
-    [KEY_SPREVIOUS] = 73 | GREY | SHIFT, /* Shift + Page Up */
-    [KEY_SNEXT] = 81 | GREY | SHIFT, /* Shift + Page Down */
-
     ['!'] = 2 | SHIFT,
     ['@'] = 3 | SHIFT,
     ['#'] = 4 | SHIFT,
@@ -166,7 +143,6 @@ static const int curses2keycode[CURSES_KEYS] = {
     ['_'] = 12 | SHIFT,
     ['+'] = 13 | SHIFT,
 
-    [KEY_BTAB] = 15 | SHIFT, /* Shift + Tab */
     ['Q'] = 16 | SHIFT,
     ['W'] = 17 | SHIFT,
     ['E'] = 18 | SHIFT,
@@ -205,19 +181,6 @@ static const int curses2keycode[CURSES_KEYS] = {
     ['>'] = 52 | SHIFT,
     ['?'] = 53 | SHIFT,
 
-    [KEY_F(13)] = 59 | SHIFT, /* Shift + Function Key 1 */
-    [KEY_F(14)] = 60 | SHIFT, /* Shift + Function Key 2 */
-    [KEY_F(15)] = 61 | SHIFT, /* Shift + Function Key 3 */
-    [KEY_F(16)] = 62 | SHIFT, /* Shift + Function Key 4 */
-    [KEY_F(17)] = 63 | SHIFT, /* Shift + Function Key 5 */
-    [KEY_F(18)] = 64 | SHIFT, /* Shift + Function Key 6 */
-    [KEY_F(19)] = 65 | SHIFT, /* Shift + Function Key 7 */
-    [KEY_F(20)] = 66 | SHIFT, /* Shift + Function Key 8 */
-    [KEY_F(21)] = 67 | SHIFT, /* Shift + Function Key 9 */
-    [KEY_F(22)] = 68 | SHIFT, /* Shift + Function Key 10 */
-    [KEY_F(23)] = 69 | SHIFT, /* Shift + Function Key 11 */
-    [KEY_F(24)] = 70 | SHIFT, /* Shift + Function Key 12 */
-
     ['Q' - '@'] = 16 | CNTRL, /* Control + q */
     ['W' - '@'] = 17 | CNTRL, /* Control + w */
     ['E' - '@'] = 18 | CNTRL, /* Control + e */
@@ -249,13 +212,67 @@ static const int curses2keycode[CURSES_KEYS] = {
 
 };
 
-static const int curses2qemu[CURSES_KEYS] = {
+static const int _curseskey2keycode[CURSES_KEYS] = {
     [0 ... (CURSES_KEYS - 1)] = -1,
 
+    [KEY_BACKSPACE] = 14, /* Backspace */
+
+    [KEY_ENTER] = 28, /* Return */
+
+    [KEY_F(1)] = 59, /* Function Key 1 */
+    [KEY_F(2)] = 60, /* Function Key 2 */
+    [KEY_F(3)] = 61, /* Function Key 3 */
+    [KEY_F(4)] = 62, /* Function Key 4 */
+    [KEY_F(5)] = 63, /* Function Key 5 */
+    [KEY_F(6)] = 64, /* Function Key 6 */
+    [KEY_F(7)] = 65, /* Function Key 7 */
+    [KEY_F(8)] = 66, /* Function Key 8 */
+    [KEY_F(9)] = 67, /* Function Key 9 */
+    [KEY_F(10)] = 68, /* Function Key 10 */
+    [KEY_F(11)] = 87, /* Function Key 11 */
+    [KEY_F(12)] = 88, /* Function Key 12 */
+
+    [KEY_HOME] = 71 | GREY, /* Home */
+    [KEY_UP] = 72 | GREY, /* Up Arrow */
+    [KEY_PPAGE] = 73 | GREY, /* Page Up */
+    [KEY_LEFT] = 75 | GREY, /* Left Arrow */
+    [KEY_RIGHT] = 77 | GREY, /* Right Arrow */
+    [KEY_END] = 79 | GREY, /* End */
+    [KEY_DOWN] = 80 | GREY, /* Down Arrow */
+    [KEY_NPAGE] = 81 | GREY, /* Page Down */
+    [KEY_IC] = 82 | GREY, /* Insert */
+    [KEY_DC] = 83 | GREY, /* Delete */
+
+    [KEY_SPREVIOUS] = 73 | GREY | SHIFT, /* Shift + Page Up */
+    [KEY_SNEXT] = 81 | GREY | SHIFT, /* Shift + Page Down */
+
+    [KEY_BTAB] = 15 | SHIFT, /* Shift + Tab */
+
+    [KEY_F(13)] = 59 | SHIFT, /* Shift + Function Key 1 */
+    [KEY_F(14)] = 60 | SHIFT, /* Shift + Function Key 2 */
+    [KEY_F(15)] = 61 | SHIFT, /* Shift + Function Key 3 */
+    [KEY_F(16)] = 62 | SHIFT, /* Shift + Function Key 4 */
+    [KEY_F(17)] = 63 | SHIFT, /* Shift + Function Key 5 */
+    [KEY_F(18)] = 64 | SHIFT, /* Shift + Function Key 6 */
+    [KEY_F(19)] = 65 | SHIFT, /* Shift + Function Key 7 */
+    [KEY_F(20)] = 66 | SHIFT, /* Shift + Function Key 8 */
+    [KEY_F(21)] = 67 | SHIFT, /* Shift + Function Key 9 */
+    [KEY_F(22)] = 68 | SHIFT, /* Shift + Function Key 10 */
+    [KEY_F(23)] = 69 | SHIFT, /* Shift + Function Key 11 */
+    [KEY_F(24)] = 70 | SHIFT, /* Shift + Function Key 12 */
+};
+
+static const int _curses2qemu[CURSES_CHARS] = {
+    [0 ... (CURSES_CHARS - 1)] = -1,
+
     ['\n'] = '\n',
     ['\r'] = '\n',
 
     [0x07f] = QEMU_KEY_BACKSPACE,
+};
+
+static const int _curseskey2qemu[CURSES_KEYS] = {
+    [0 ... (CURSES_KEYS - 1)] = -1,
 
     [KEY_DOWN] = QEMU_KEY_DOWN,
     [KEY_UP] = QEMU_KEY_UP,