[mutter/bilelmoussaoui/gdk-x11-only: 3/6] clutter: Add keyval helpers

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 67875bf160d50c934c3b808a8514727d01e45358
Author: Bilal Elmoussaoui <belmouss redhat com>
Date:   Mon May 9 16:25:40 2022 +0200

    clutter: Add keyval helpers
    
    Infrastructure for adding meta_accelerator_name

 clutter/clutter/clutter-keyval.c | 215 +++++++++++++++++++++++++++++++++++++++
 clutter/clutter/clutter-keyval.h |  44 ++++++++
 clutter/clutter/clutter.h        |   1 +
 clutter/clutter/meson.build      |   2 +
 4 files changed, 262 insertions(+)
---
diff --git a/clutter/clutter/clutter-keyval.c b/clutter/clutter/clutter-keyval.c
new file mode 100644
index 0000000000..12ea0d9d5c
--- /dev/null
+++ b/clutter/clutter/clutter-keyval.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2021 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Bilal Elmoussaoui <belmous redhat com>
+ * 
+ * The code is a modified version of the GDK implementation
+ */
+
+#include <glib.h>
+#include <glib/gprintf.h>
+
+#include "clutter-keyval.h"
+#include "clutter-event.h"
+#include "clutter-keysyms.h"
+#include "clutter-keyname-table.h"
+
+#define CLUTTER_NUM_KEYS G_N_ELEMENTS (clutter_keys_by_keyval)
+
+/**
+ * clutter_keyval_convert_case: 
+ * @symbol: a keyval.
+ * @lower: (out): return location of the lowercase version of @symbol.
+ * @upper: (out): return location of the uppercase version of @symbol.
+ */
+void
+clutter_keyval_convert_case (unsigned int  symbol,
+                             unsigned int *lower,
+                             unsigned int *upper)
+{
+  unsigned int xlower, xupper;
+
+  xlower = symbol;
+  xupper = symbol;
+
+  /* Check for directly encoded 24-bit UCS characters: */
+  if ((symbol & 0xff000000) == 0x01000000)
+    {
+      if (lower)
+        *lower = clutter_unicode_to_keysym (g_unichar_tolower (symbol & 0x00ffffff));
+      if (upper)
+        *upper = clutter_unicode_to_keysym (g_unichar_toupper (symbol & 0x00ffffff));
+      return;
+    }
+
+  switch (symbol >> 8)
+    {
+    case 0: /* Latin 1 */
+      if ((symbol >= CLUTTER_KEY_A) && (symbol <= CLUTTER_KEY_Z))
+        xlower += (CLUTTER_KEY_a - CLUTTER_KEY_A);
+      else if ((symbol >= CLUTTER_KEY_a) && (symbol <= CLUTTER_KEY_z))
+        xupper -= (CLUTTER_KEY_a - CLUTTER_KEY_A);
+      else if ((symbol >= CLUTTER_KEY_Agrave) && (symbol <= CLUTTER_KEY_Odiaeresis))
+        xlower += (CLUTTER_KEY_agrave - CLUTTER_KEY_Agrave);
+      else if ((symbol >= CLUTTER_KEY_agrave) && (symbol <= CLUTTER_KEY_odiaeresis))
+        xupper -= (CLUTTER_KEY_agrave - CLUTTER_KEY_Agrave);
+      else if ((symbol >= CLUTTER_KEY_Ooblique) && (symbol <= CLUTTER_KEY_Thorn))
+        xlower += (CLUTTER_KEY_oslash - CLUTTER_KEY_Ooblique);
+      else if ((symbol >= CLUTTER_KEY_oslash) && (symbol <= CLUTTER_KEY_thorn))
+        xupper -= (CLUTTER_KEY_oslash - CLUTTER_KEY_Ooblique);
+      break;
+
+    case 1: /* Latin 2 */
+      /* Assume the KeySym is a legal value (ignore discontinuities) */
+      if (symbol == CLUTTER_KEY_Aogonek)
+        xlower = CLUTTER_KEY_aogonek;
+      else if (symbol >= CLUTTER_KEY_Lstroke && symbol <= CLUTTER_KEY_Sacute)
+        xlower += (CLUTTER_KEY_lstroke - CLUTTER_KEY_Lstroke);
+      else if (symbol >= CLUTTER_KEY_Scaron && symbol <= CLUTTER_KEY_Zacute)
+        xlower += (CLUTTER_KEY_scaron - CLUTTER_KEY_Scaron);
+      else if (symbol >= CLUTTER_KEY_Zcaron && symbol <= CLUTTER_KEY_Zabovedot)
+        xlower += (CLUTTER_KEY_zcaron - CLUTTER_KEY_Zcaron);
+      else if (symbol == CLUTTER_KEY_aogonek)
+        xupper = CLUTTER_KEY_Aogonek;
+      else if (symbol >= CLUTTER_KEY_lstroke && symbol <= CLUTTER_KEY_sacute)
+        xupper -= (CLUTTER_KEY_lstroke - CLUTTER_KEY_Lstroke);
+      else if (symbol >= CLUTTER_KEY_scaron && symbol <= CLUTTER_KEY_zacute)
+        xupper -= (CLUTTER_KEY_scaron - CLUTTER_KEY_Scaron);
+      else if (symbol >= CLUTTER_KEY_zcaron && symbol <= CLUTTER_KEY_zabovedot)
+        xupper -= (CLUTTER_KEY_zcaron - CLUTTER_KEY_Zcaron);
+      else if (symbol >= CLUTTER_KEY_Racute && symbol <= CLUTTER_KEY_Tcedilla)
+        xlower += (CLUTTER_KEY_racute - CLUTTER_KEY_Racute);
+      else if (symbol >= CLUTTER_KEY_racute && symbol <= CLUTTER_KEY_tcedilla)
+        xupper -= (CLUTTER_KEY_racute - CLUTTER_KEY_Racute);
+      break;
+
+    case 2: /* Latin 3 */
+      /* Assume the KeySym is a legal value (ignore discontinuities) */
+      if (symbol >= CLUTTER_KEY_Hstroke && symbol <= CLUTTER_KEY_Hcircumflex)
+        xlower += (CLUTTER_KEY_hstroke - CLUTTER_KEY_Hstroke);
+      else if (symbol >= CLUTTER_KEY_Gbreve && symbol <= CLUTTER_KEY_Jcircumflex)
+        xlower += (CLUTTER_KEY_gbreve - CLUTTER_KEY_Gbreve);
+      else if (symbol >= CLUTTER_KEY_hstroke && symbol <= CLUTTER_KEY_hcircumflex)
+        xupper -= (CLUTTER_KEY_hstroke - CLUTTER_KEY_Hstroke);
+      else if (symbol >= CLUTTER_KEY_gbreve && symbol <= CLUTTER_KEY_jcircumflex)
+        xupper -= (CLUTTER_KEY_gbreve - CLUTTER_KEY_Gbreve);
+      else if (symbol >= CLUTTER_KEY_Cabovedot && symbol <= CLUTTER_KEY_Scircumflex)
+        xlower += (CLUTTER_KEY_cabovedot - CLUTTER_KEY_Cabovedot);
+      else if (symbol >= CLUTTER_KEY_cabovedot && symbol <= CLUTTER_KEY_scircumflex)
+        xupper -= (CLUTTER_KEY_cabovedot - CLUTTER_KEY_Cabovedot);
+      break;
+
+    case 3: /* Latin 4 */
+      /* Assume the KeySym is a legal value (ignore discontinuities) */
+      if (symbol >= CLUTTER_KEY_Rcedilla && symbol <= CLUTTER_KEY_Tslash)
+        xlower += (CLUTTER_KEY_rcedilla - CLUTTER_KEY_Rcedilla);
+      else if (symbol >= CLUTTER_KEY_rcedilla && symbol <= CLUTTER_KEY_tslash)
+        xupper -= (CLUTTER_KEY_rcedilla - CLUTTER_KEY_Rcedilla);
+      else if (symbol == CLUTTER_KEY_ENG)
+        xlower = CLUTTER_KEY_eng;
+      else if (symbol == CLUTTER_KEY_eng)
+        xupper = CLUTTER_KEY_ENG;
+      else if (symbol >= CLUTTER_KEY_Amacron && symbol <= CLUTTER_KEY_Umacron)
+        xlower += (CLUTTER_KEY_amacron - CLUTTER_KEY_Amacron);
+      else if (symbol >= CLUTTER_KEY_amacron && symbol <= CLUTTER_KEY_umacron)
+        xupper -= (CLUTTER_KEY_amacron - CLUTTER_KEY_Amacron);
+      break;
+
+    case 6: /* Cyrillic */
+      /* Assume the KeySym is a legal value (ignore discontinuities) */
+      if (symbol >= CLUTTER_KEY_Serbian_DJE && symbol <= CLUTTER_KEY_Serbian_DZE)
+        xlower -= (CLUTTER_KEY_Serbian_DJE - CLUTTER_KEY_Serbian_dje);
+      else if (symbol >= CLUTTER_KEY_Serbian_dje && symbol <= CLUTTER_KEY_Serbian_dze)
+        xupper += (CLUTTER_KEY_Serbian_DJE - CLUTTER_KEY_Serbian_dje);
+      else if (symbol >= CLUTTER_KEY_Cyrillic_YU && symbol <= CLUTTER_KEY_Cyrillic_HARDSIGN)
+        xlower -= (CLUTTER_KEY_Cyrillic_YU - CLUTTER_KEY_Cyrillic_yu);
+      else if (symbol >= CLUTTER_KEY_Cyrillic_yu && symbol <= CLUTTER_KEY_Cyrillic_hardsign)
+        xupper += (CLUTTER_KEY_Cyrillic_YU - CLUTTER_KEY_Cyrillic_yu);
+      break;
+
+    case 7: /* Greek */
+      /* Assume the KeySym is a legal value (ignore discontinuities) */
+      if (symbol >= CLUTTER_KEY_Greek_ALPHAaccent && symbol <= CLUTTER_KEY_Greek_OMEGAaccent)
+        xlower += (CLUTTER_KEY_Greek_alphaaccent - CLUTTER_KEY_Greek_ALPHAaccent);
+      else if (symbol >= CLUTTER_KEY_Greek_alphaaccent && symbol <= CLUTTER_KEY_Greek_omegaaccent &&
+               symbol != CLUTTER_KEY_Greek_iotaaccentdieresis &&
+               symbol != CLUTTER_KEY_Greek_upsilonaccentdieresis)
+        xupper -= (CLUTTER_KEY_Greek_alphaaccent - CLUTTER_KEY_Greek_ALPHAaccent);
+      else if (symbol >= CLUTTER_KEY_Greek_ALPHA && symbol <= CLUTTER_KEY_Greek_OMEGA)
+        xlower += (CLUTTER_KEY_Greek_alpha - CLUTTER_KEY_Greek_ALPHA);
+      else if (symbol == CLUTTER_KEY_Greek_finalsmallsigma)
+        xupper = CLUTTER_KEY_Greek_SIGMA;
+      else if (symbol >= CLUTTER_KEY_Greek_alpha && symbol <= CLUTTER_KEY_Greek_omega)
+        xupper -= (CLUTTER_KEY_Greek_alpha - CLUTTER_KEY_Greek_ALPHA);
+      break;
+
+    default:
+      break;
+    }
+
+  if (lower)
+    *lower = xlower;
+  if (upper)
+    *upper = xupper;
+}
+
+static int
+clutter_keys_keyval_compare (const void *pkey, const void *pbase)
+{
+  return (*(int *) pkey) - ((clutter_key *) pbase)->keyval;
+}
+
+/**
+ * clutter_keyval_name:
+ * @keyval: A key value.
+ *  
+ * Returns: (nullable): The corresponding symbolic name.
+ */
+char *
+clutter_keyval_name (unsigned int keyval)
+{
+  static char buf[100];
+  clutter_key *found;
+
+  /* Check for directly encoded 24-bit UCS characters: */
+  if ((keyval & 0xff000000) == 0x01000000)
+    {
+      g_sprintf (buf, "U+%.04X", (keyval & 0x00ffffff));
+      return buf;
+    }
+
+  found = bsearch (&keyval, clutter_keys_by_keyval,
+                  CLUTTER_NUM_KEYS, sizeof (clutter_key),
+                  clutter_keys_keyval_compare);
+
+  if (found != NULL)
+    {
+      while ((found > clutter_keys_by_keyval) &&
+             ((found - 1)->keyval == keyval))
+        found--;
+
+      return (char *) (keynames + found->offset);
+    }
+  else if (keyval != 0)
+    {
+      g_sprintf (buf, "%#x", keyval);
+      return buf;
+    }
+
+  return NULL;
+}
\ No newline at end of file
diff --git a/clutter/clutter/clutter-keyval.h b/clutter/clutter/clutter-keyval.h
new file mode 100644
index 0000000000..5f9b4ee621
--- /dev/null
+++ b/clutter/clutter/clutter-keyval.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2021 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Bilal Elmoussaoui <belmous redhat com>
+ * 
+ * The code is a modified version of the GDK implementation
+ */
+#ifndef __CLUTTER_KEYVAL_H__
+#define __CLUTTER_KEYVAL_H__
+
+#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
+#error "Only <clutter/keyval.h> can be included directly."
+#endif
+
+#include <clutter/clutter-types.h>
+
+G_BEGIN_DECLS
+
+CLUTTER_EXPORT
+void clutter_keyval_convert_case (unsigned int  symbol,
+                                  unsigned int *lower,
+                                  unsigned int *upper);
+
+CLUTTER_EXPORT
+char * clutter_keyval_name       (unsigned int keyval);
+
+G_END_DECLS
+
+#endif /* __CLUTTER_KEYVAL_H__ */
diff --git a/clutter/clutter/clutter.h b/clutter/clutter/clutter.h
index be788b9e56..d2259c0b03 100644
--- a/clutter/clutter/clutter.h
+++ b/clutter/clutter/clutter.h
@@ -76,6 +76,7 @@
 #include "clutter-keyframe-transition.h"
 #include "clutter-keymap.h"
 #include "clutter-keysyms.h"
+#include "clutter-keyval.h"
 #include "clutter-layout-manager.h"
 #include "clutter-layout-meta.h"
 #include "clutter-macros.h"
diff --git a/clutter/clutter/meson.build b/clutter/clutter/meson.build
index ff834f6200..a224b4e6fd 100644
--- a/clutter/clutter/meson.build
+++ b/clutter/clutter/meson.build
@@ -50,6 +50,8 @@ clutter_headers = [
   'clutter-keyframe-transition.h',
   'clutter-keymap.h',
   'clutter-keysyms.h',
+  'clutter-keyval.c',
+  'clutter-keyval.h',
   'clutter-layout-manager.h',
   'clutter-layout-meta.h',
   'clutter-macros.h',