xkb: add XkbLoadKeymapFromString

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>

2 files changed, 106 insertions, 8 deletions

diff --git a/xkb/ddxLoad.c b/xkb/ddxLoad.c
index 76bf09ca7..1dc0e4eee 100644
--- a/xkb/ddxLoad.c
+++ b/xkb/ddxLoad.c
@@ -68,6 +68,9 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define PATHSEPARATOR "/"
 #endif
 
+static unsigned
+LoadXKM(unsigned want, unsigned need, const char *keymap, XkbDescPtr *xkbRtrn);
+
 static void
 OutputDirectory(char *outdir, size_t size)
 {
@@ -255,6 +258,46 @@ XkbDDXCompileKeymapByNames(XkbDescPtr xkb,
     return rc;
 }
 
+typedef struct {
+    const char *keymap;
+    size_t len;
+} XkbKeymapString;
+
+static void
+xkb_write_keymap_string_cb(FILE *out, void *userdata)
+{
+    XkbKeymapString *s = userdata;
+    fwrite(s->keymap, s->len, 1, out);
+}
+
+static unsigned int
+XkbDDXLoadKeymapFromString(DeviceIntPtr keybd,
+                          const char *keymap, int keymap_length,
+                          unsigned int want,
+                          unsigned int need,
+                          XkbDescPtr *xkbRtrn)
+{
+    unsigned int have;
+    char *map_name;
+    XkbKeymapString map = {
+        .keymap = keymap,
+        .len = keymap_length
+    };
+
+    *xkbRtrn = NULL;
+
+    map_name = RunXkbComp(xkb_write_keymap_string_cb, &map);
+    if (!map_name) {
+        LogMessage(X_ERROR, "XKB: Couldn't compile keymap\n");
+        return 0;
+    }
+
+    have = LoadXKM(want, need, map_name, xkbRtrn);
+    free(map_name);
+
+    return have;
+}
+
 static FILE *
 XkbDDXOpenConfigFile(const char *mapName, char *fileNameRtrn, int fileNameRtrnLen)
 {
@@ -486,3 +529,32 @@ XkbCompileKeymap(DeviceIntPtr dev, XkbRMLVOSet * rmlvo)
 
     return KeymapOrDefaults(dev, xkb);
 }
+
+XkbDescPtr
+XkbCompileKeymapFromString(DeviceIntPtr dev,
+                           const char *keymap, int keymap_length)
+{
+    XkbDescPtr xkb;
+    unsigned int need, provided;
+
+    if (!dev || !keymap) {
+        LogMessage(X_ERROR, "XKB: No device or keymap specified\n");
+        return NULL;
+    }
+
+    /* These are the components we really really need */
+    need = XkmSymbolsMask | XkmCompatMapMask | XkmTypesMask |
+           XkmKeyNamesMask | XkmVirtualModsMask;
+
+    provided =
+        XkbDDXLoadKeymapFromString(dev, keymap, keymap_length,
+                                   XkmAllIndicesMask, need, &xkb);
+    if ((need & provided) != need) {
+        if (xkb) {
+            XkbFreeKeyboard(xkb, 0, TRUE);
+            xkb = NULL;
+        }
+    }
+
+    return KeymapOrDefaults(dev, xkb);
+}
diff --git a/xkb/xkbInit.c b/xkb/xkbInit.c
index 33420b6b6..06ec46e81 100644
--- a/xkb/xkbInit.c
+++ b/xkb/xkbInit.c
@@ -505,9 +505,10 @@ XkbInitControls(DeviceIntPtr pXDev, XkbSrvInfoPtr xkbi)
     return Success;
 }
 
-_X_EXPORT Bool
-InitKeyboardDeviceStruct(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
-                         BellProcPtr bell_func, KbdCtrlProcPtr ctrl_func)
+static Bool
+InitKeyboardDeviceStructInternal(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
+                                 const char *keymap, int keymap_length,
+                                 BellProcPtr bell_func, KbdCtrlProcPtr ctrl_func)
 {
     int i;
     unsigned int check;
@@ -521,8 +522,9 @@ InitKeyboardDeviceStruct(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
     BUG_RETURN_VAL(dev == NULL, FALSE);
     BUG_RETURN_VAL(dev->key != NULL, FALSE);
     BUG_RETURN_VAL(dev->kbdfeed != NULL, FALSE);
+    BUG_RETURN_VAL(rmlvo && keymap, FALSE);
 
-    if (!rmlvo) {
+    if (!rmlvo && !keymap) {
         rmlvo = &rmlvo_dflts;
         XkbGetRulesDflts(rmlvo);
     }
@@ -550,7 +552,7 @@ InitKeyboardDeviceStruct(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
     }
     dev->key->xkbInfo = xkbi;
 
-    if (xkb_cached_map && !XkbCompareUsedRMLVO(rmlvo)) {
+    if (xkb_cached_map && (keymap || (rmlvo && !XkbCompareUsedRMLVO(rmlvo)))) {
         XkbFreeKeyboard(xkb_cached_map, XkbAllComponentsMask, TRUE);
         xkb_cached_map = NULL;
     }
@@ -558,7 +560,11 @@ InitKeyboardDeviceStruct(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
     if (xkb_cached_map)
         LogMessageVerb(X_INFO, 4, "XKB: Reusing cached keymap\n");
     else {
-        xkb_cached_map = XkbCompileKeymap(dev, rmlvo);
+        if (rmlvo)
+            xkb_cached_map = XkbCompileKeymap(dev, rmlvo);
+        else
+            xkb_cached_map = XkbCompileKeymapFromString(dev, keymap, keymap_length);
+
         if (!xkb_cached_map) {
             ErrorF("XKB: Failed to compile keymap\n");
             goto unwind_info;
@@ -627,8 +633,10 @@ InitKeyboardDeviceStruct(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
 
     dev->kbdfeed->CtrlProc(dev, &dev->kbdfeed->ctrl);
 
-    XkbSetRulesDflts(rmlvo);
-    XkbSetRulesUsed(rmlvo);
+    if (rmlvo) {
+        XkbSetRulesDflts(rmlvo);
+        XkbSetRulesUsed(rmlvo);
+    }
     XkbFreeRMLVOSet(&rmlvo_dflts, FALSE);
 
     return TRUE;
@@ -647,6 +655,24 @@ InitKeyboardDeviceStruct(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
     return FALSE;
 }
 
+_X_EXPORT Bool
+InitKeyboardDeviceStruct(DeviceIntPtr dev, XkbRMLVOSet * rmlvo,
+                         BellProcPtr bell_func, KbdCtrlProcPtr ctrl_func)
+{
+    return InitKeyboardDeviceStructInternal(dev, rmlvo,
+                                            NULL, 0, bell_func, ctrl_func);
+}
+
+_X_EXPORT Bool
+InitKeyboardDeviceStructFromString(DeviceIntPtr dev,
+                                   const char *keymap, int keymap_length,
+                                   BellProcPtr bell_func, KbdCtrlProcPtr ctrl_func)
+{
+    return InitKeyboardDeviceStructInternal(dev, NULL,
+                                            keymap, keymap_length,
+                                            bell_func, ctrl_func);
+}
+
 /***====================================================================***/
 
         /*