1 files changed, 73 insertions, 0 deletions
diff --git a/src/select/properties/z_index.c b/src/select/properties/z_index.c
new file mode 100644
index 0000000..aeb01db
--- /dev/null
+++ b/src/select/properties/z_index.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of LibCSS
+ * Licensed under the MIT License,
+ *		  http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
+ */
+
+#include "bytecode/bytecode.h"
+#include "bytecode/opcodes.h"
+#include "select/propset.h"
+#include "select/propget.h"
+#include "utils/utils.h"
+
+#include "select/properties/properties.h"
+#include "select/properties/helpers.h"
+
+css_error cascade_z_index(uint32_t opv, css_style *style, 
+		css_select_state *state)
+{
+	uint16_t value = CSS_Z_INDEX_INHERIT;
+	css_fixed index = 0;
+
+	if (isInherit(opv) == false) {
+		switch (getValue(opv)) {
+		case Z_INDEX_SET:
+			value = CSS_Z_INDEX_SET;
+
+			index = *((css_fixed *) style->bytecode);
+			advance_bytecode(style, sizeof(index));
+			break;
+		case Z_INDEX_AUTO:
+			value = CSS_Z_INDEX_AUTO;
+			break;
+		}
+	}
+
+	if (outranks_existing(getOpcode(opv), isImportant(opv), state,
+			isInherit(opv))) {
+		return set_z_index(state->result, value, index);
+	}
+
+	return CSS_OK;
+}
+
+css_error set_z_index_from_hint(const css_hint *hint,
+		css_computed_style *style)
+{
+	return set_z_index(style, hint->status, hint->data.integer);
+}
+
+css_error initial_z_index(css_select_state *state)
+{
+	return set_z_index(state->result, CSS_Z_INDEX_AUTO, 0);
+}
+
+css_error compose_z_index(const css_computed_style *parent,
+		const css_computed_style *child,
+		css_computed_style *result)
+{
+	int32_t index = 0;
+	uint8_t type = get_z_index(child, &index);
+
+	if (type == CSS_Z_INDEX_INHERIT) {
+		type = get_z_index(parent, &index);
+	}
+
+	return set_z_index(result, type, index);
+}
+
+uint32_t destroy_z_index(void *bytecode)
+{
+	return generic_destroy_number(bytecode);
+}