move MetaButtonLayout to libmetacity

3 files changed, 200 insertions, 0 deletions

diff --git a/libmetacity/Makefile.am b/libmetacity/Makefile.am
index 47c445b8..49664896 100644
--- a/libmetacity/Makefile.am
+++ b/libmetacity/Makefile.am
@@ -5,6 +5,8 @@ lib_LTLIBRARIES = libmetacity.la
 libmetacity_la_SOURCES = \
 	meta-button-function.c \
 	meta-button-function.h \
+	meta-button-layout.c \
+	meta-button-layout.h \
 	meta-color.c \
 	meta-color.h \
 	meta-color-private.h \
@@ -52,6 +54,7 @@ libmetacity_la_LIBADD = \
 libmetacity_includedir = $(includedir)/metacity/libmetacity
 libmetacity_include_HEADERS = \
 	meta-button-function.h \
+	meta-button-layout.h \
 	meta-color.h \
 	meta-color-spec.h \
 	meta-frame-borders.h \
diff --git a/libmetacity/meta-button-layout.c b/libmetacity/meta-button-layout.c
new file mode 100644
index 00000000..fc299109
--- /dev/null
+++ b/libmetacity/meta-button-layout.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2001 Havoc Pennington
+ * Copyright (C) 2016 Alberts Muktupāvels
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "meta-button-layout.h"
+
+static void
+meta_button_layout_init (MetaButtonLayout *layout)
+{
+  gint i;
+
+  for (i = 0; i < META_BUTTON_FUNCTION_LAST; i++)
+    {
+      layout->left_buttons[i] = META_BUTTON_FUNCTION_LAST;
+      layout->left_buttons_has_spacer[i] = FALSE;
+
+      layout->right_buttons[i] = META_BUTTON_FUNCTION_LAST;
+      layout->right_buttons_has_spacer[i] = FALSE;
+    }
+}
+
+static void
+string_to_buttons (const gchar        *str,
+                   MetaButtonFunction  side_buttons[META_BUTTON_FUNCTION_LAST],
+                   gboolean            side_has_spacer[META_BUTTON_FUNCTION_LAST])
+{
+  gint i;
+  gint b;
+  gboolean used[META_BUTTON_FUNCTION_LAST];
+  gchar **buttons;
+
+  i = 0;
+  while (i < META_BUTTON_FUNCTION_LAST)
+    used[i++] = FALSE;
+
+  buttons = g_strsplit (str, ",", -1);
+
+  i = b = 0;
+  while (buttons[b] != NULL)
+    {
+      MetaButtonFunction f;
+
+      f = meta_button_function_from_string (buttons[b]);
+
+      if (i > 0 && g_strcmp0 ("spacer", buttons[b]) == 0)
+        {
+          side_has_spacer[i - 1] = TRUE;
+
+          f = meta_button_function_get_opposite (f);
+          if (f != META_BUTTON_FUNCTION_LAST)
+            side_has_spacer[i - 2] = TRUE;
+        }
+      else
+        {
+          if (f != META_BUTTON_FUNCTION_LAST && !used[f])
+            {
+              side_buttons[i] = f;
+              used[f] = TRUE;
+              i++;
+
+              f = meta_button_function_get_opposite (f);
+              if (f != META_BUTTON_FUNCTION_LAST)
+                side_buttons[i++] = f;
+            }
+          else
+            {
+              g_debug ("Ignoring unknown or already-used button name - '%s'",
+                       buttons[b]);
+            }
+        }
+
+      b++;
+    }
+
+  g_strfreev (buttons);
+}
+
+MetaButtonLayout
+meta_button_layout_new (const gchar *str,
+                        gboolean     invert)
+{
+  gchar **sides;
+  MetaButtonLayout layout;
+  MetaButtonLayout rtl_layout;
+  gint i;
+  gint j;
+
+  sides = g_strsplit (str, ":", 2);
+  meta_button_layout_init (&layout);
+
+  if (sides[0] != NULL)
+    {
+      string_to_buttons (sides[0], layout.left_buttons,
+                         layout.left_buttons_has_spacer);
+    }
+
+  if (sides[0] != NULL && sides[1] != NULL)
+    {
+      string_to_buttons (sides[1], layout.right_buttons,
+                         layout.right_buttons_has_spacer);
+    }
+
+  g_strfreev (sides);
+
+  if (!invert)
+    return layout;
+
+  meta_button_layout_init (&rtl_layout);
+
+  i = 0;
+  while (rtl_layout.left_buttons[i] != META_BUTTON_FUNCTION_LAST)
+    i++;
+
+  for (j = 0; j < i; j++)
+    {
+      rtl_layout.right_buttons[j] = layout.left_buttons[i - j - 1];
+
+      if (j == 0)
+        rtl_layout.right_buttons_has_spacer[i - 1] = layout.left_buttons_has_spacer[i - j - 1];
+      else
+        rtl_layout.right_buttons_has_spacer[j - 1] = layout.left_buttons_has_spacer[i - j - 1];
+    }
+
+  i = 0;
+  while (rtl_layout.left_buttons[i] != META_BUTTON_FUNCTION_LAST)
+    i++;
+
+  for (j = 0; j < i; j++)
+    {
+      rtl_layout.left_buttons[j] = layout.right_buttons[i - j - 1];
+
+      if (j == 0)
+        rtl_layout.left_buttons_has_spacer[i - 1] = layout.right_buttons_has_spacer[i - j - 1];
+      else
+        rtl_layout.left_buttons_has_spacer[j - 1] = layout.right_buttons_has_spacer[i - j - 1];
+    }
+
+  return rtl_layout;
+}
diff --git a/libmetacity/meta-button-layout.h b/libmetacity/meta-button-layout.h
new file mode 100644
index 00000000..434d5a70
--- /dev/null
+++ b/libmetacity/meta-button-layout.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2001 Havoc Pennington
+ * Copyright (C) 2016 Alberts Muktupāvels
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef META_BUTTON_LAYOUT_H
+#define META_BUTTON_LAYOUT_H
+
+#include <libmetacity/meta-button-function.h>
+
+G_BEGIN_DECLS
+
+typedef struct
+{
+  /* buttons in the group on the left side */
+  MetaButtonFunction left_buttons[META_BUTTON_FUNCTION_LAST];
+  gboolean left_buttons_has_spacer[META_BUTTON_FUNCTION_LAST];
+
+  /* buttons in the group on the right side */
+  MetaButtonFunction right_buttons[META_BUTTON_FUNCTION_LAST];
+  gboolean right_buttons_has_spacer[META_BUTTON_FUNCTION_LAST];
+} MetaButtonLayout;
+
+MetaButtonLayout meta_button_layout_new (const gchar *str,
+                                         gboolean     invert);
+
+G_END_DECLS
+
+#endif