Renamed various types to fit lower_case_with_underscores convention.

[videolink.git] / style_sheets.cpp

diff --git a/style_sheets.cpp b/style_sheets.cpp
new file mode 100644 (file)
index 0000000..5767800
--- /dev/null
+++ b/style_sheets.cpp
@@ -0,0 +1,50 @@
+// Copyright 2005 Ben Hutchings <ben@decadentplace.org.uk>.
+// See the file "COPYING" for licence details.
+
+#include "style_sheets.hpp"
+
+#include <nsContentCID.h>
+#include <nsICSSLoader.h>
+#include <nsICSSStyleSheet.h>
+#include <nsIPresShell.h>
+#include <nsIServiceManagerUtils.h>
+#include <nsIURI.h>
+#include <nsNetUtil.h>
+
+#include "xpcom_support.hpp"
+
+using xpcom_support::check;
+
+// Load a CSS from an (absolute) URI.
+// TODO: Support loading from an absolute, or better, relative filename.
+already_AddRefed<nsIStyleSheet> load_css(const char * uri)
+{
+    nsCOMPtr<nsICSSLoader> css_loader;
+    static const nsCID css_loader_cid = NS_CSS_LOADER_CID;
+    check(CallGetService<nsICSSLoader>(css_loader_cid,
+                                      getter_AddRefs(css_loader)));
+
+    nsCOMPtr<nsIURI> style_sheet_uri;
+    check(NS_NewURI(getter_AddRefs(style_sheet_uri), nsCString(uri)));
+
+    nsICSSStyleSheet * style_sheet;
+    check(css_loader->LoadAgentSheet(style_sheet_uri, &style_sheet));
+    return style_sheet;
+}
+
+// Apply a style-sheet to a given presentation shell as the top-priority
+// agent style-sheet and disable the preferences-derived style rules.
+void apply_style_sheet(nsIStyleSheet * style_sheet, nsIPresShell * pres_shell)
+{
+    nsCOMArray<nsIStyleSheet> style_sheets;
+    check(pres_shell->GetAgentStyleSheets(style_sheets));
+    check(style_sheets.InsertObjectAt(style_sheet, 0));
+    check(pres_shell->SetAgentStyleSheets(style_sheets));
+
+    check(pres_shell->EnablePrefStyleRules(false));
+
+    // Update the display
+    check(pres_shell->ReconstructStyleData());
+    check(pres_shell->FlushPendingNotifications(true));
+}
+