libXcursor support (themed cursors).

src/xcursor.c

@@ -0,0 +1,42 @@
+#include <assert.h>
+#include <X11/Xcursor/Xcursor.h>
+#include <X11/cursorfont.h>
+
+#include "i3.h"
+#include "xcb.h"
+#include "xcursor.h"
+
+static Cursor cursors[XCURSOR_CURSOR_MAX];
+
+static const int xcb_cursors[XCURSOR_CURSOR_MAX] = {
+    XCB_CURSOR_LEFT_PTR,
+    XCB_CURSOR_SB_H_DOUBLE_ARROW,
+    XCB_CURSOR_SB_V_DOUBLE_ARROW
+};
+
+static Cursor load_cursor(const char *name, int font)
+{
+    Cursor c = XcursorLibraryLoadCursor(xlibdpy, name);
+    if (c == None)
+        c = XCreateFontCursor(xlibdpy, font);
+    return c;
+}
+
+void xcursor_load_cursors()
+{
+    cursors[XCURSOR_CURSOR_POINTER] = load_cursor("left_ptr", XC_left_ptr);
+    cursors[XCURSOR_CURSOR_RESIZE_HORIZONTAL] = load_cursor("sb_h_double_arrow", XC_sb_h_double_arrow);
+    cursors[XCURSOR_CURSOR_RESIZE_VERTICAL] = load_cursor("sb_v_double_arrow", XC_sb_v_double_arrow);
+}
+
+Cursor xcursor_get_cursor(enum xcursor_cursor_t c)
+{
+    assert(c >= 0 && c < XCURSOR_CURSOR_MAX);
+    return cursors[c];
+}
+
+int xcursor_get_xcb_cursor(enum xcursor_cursor_t c)
+{
+    assert(c >= 0 && c < XCURSOR_CURSOR_MAX);
+    return xcb_cursors[c];
+}