style_sheets.cpp

   1 // Copyright 2005 Ben Hutchings <ben@decadent.org.uk>.
   2 // See the file "COPYING" for licence details.
   3
   4 #include "style_sheets.hpp"
   5
   6 #include <nsContentCID.h>
   7 #include <nsICSSLoader.h>
   8 #include <nsICSSStyleSheet.h>
   9 #include <nsIPresShell.h>
  10 #if MOZ_VERSION_MAJOR > 1 || (MOZ_VERSION_MAJOR == 1 && MOZ_VERSION_MINOR >= 8)
  11 #   include <nsServiceManagerUtils.h>
  12 #else
  13 #   include <nsIServiceManagerUtils.h>
  14 #endif
  15 #include <nsIURI.h>
  16 #include <nsNetUtil.h>
  17
  18 #include "xpcom_support.hpp"
  19
  20 using xpcom_support::check;
  21
  22 // Load a CSS from an (absolute) URI.
  23 // TODO: Support loading from an absolute, or better, relative filename.
  24 already_AddRefed<nsIStyleSheet> load_css(const char * uri)
  25 {
  26     nsCOMPtr<nsICSSLoader> css_loader;
  27     static const nsCID css_loader_cid = NS_CSS_LOADER_CID;
  28     check(CallGetService<nsICSSLoader>(css_loader_cid,
  29                                        getter_AddRefs(css_loader)));
  30
  31     nsCOMPtr<nsIURI> style_sheet_uri;
  32     check(NS_NewURI(getter_AddRefs(style_sheet_uri), nsCString(uri)));
  33
  34     nsICSSStyleSheet * style_sheet;
  35     check(css_loader->LoadAgentSheet(style_sheet_uri, &style_sheet));
  36     return style_sheet;
  37 }
  38
  39 // Apply a style-sheet to a given presentation shell as the top-priority
  40 // agent style-sheet and disable the preferences-derived style rules.
  41 void apply_style_sheet(nsIStyleSheet * style_sheet, nsIPresShell * pres_shell)
  42 {
  43     nsCOMArray<nsIStyleSheet> style_sheets;
  44     check(pres_shell->GetAgentStyleSheets(style_sheets));
  45     check(style_sheets.AppendObject(style_sheet));
  46     check(pres_shell->SetAgentStyleSheets(style_sheets));
  47
  48     // FIXME: We need to find an alternative that works in Mozilla 1.8.
  49 #   if MOZ_VERSION_MAJOR == 1 && MOZ_VERSION_MINOR < 8
  50         check(pres_shell->EnablePrefStyleRules(false));
  51 #   endif
  52
  53     // Update the display
  54 #   if MOZ_VERSION_MAJOR > 1                              \
  55     || (MOZ_VERSION_MAJOR == 1 && MOZ_VERSION_MINOR >= 8)
  56         pres_shell->ReconstructStyleData();
  57         check(pres_shell->FlushPendingNotifications(Flush_Display));
  58 #   else
  59         check(pres_shell->ReconstructStyleData());
  60         check(pres_shell->FlushPendingNotifications(true));
  61 #   endif
  62 }