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 #if MOZ_VERSION_MAJOR > 1 || (MOZ_VERSION_MAJOR == 1 && MOZ_VERSION_MINOR >= 8)
   8 #   include <nsIStyleSheetService.h>
   9 #   include <nsServiceManagerUtils.h>
  10 #else
  11 #   include <nsICSSLoader.h>
  12 #   include <nsICSSStyleSheet.h>
  13 #   include <nsIPresShell.h>
  14 #   include <nsIServiceManagerUtils.h>
  15 #endif
  16 #include <nsIURI.h>
  17 #include <nsNetUtil.h>
  18
  19 #include "xpcom_support.hpp"
  20
  21 using xpcom_support::check;
  22
  23 #if MOZ_VERSION_MAJOR > 1 || (MOZ_VERSION_MAJOR == 1 && MOZ_VERSION_MINOR >= 8)
  24
  25 // We just have to load and register a style-sheet as a user
  26 // style-sheet.  There is no need to do anything for each page.
  27
  28 agent_style_sheet_holder init_agent_style_sheet(const char * uri)
  29 {
  30     nsCOMPtr<nsIURI> style_sheet_uri;
  31     check(NS_NewURI(getter_AddRefs(style_sheet_uri), nsCString(uri)));
  32
  33     nsCOMPtr<nsIStyleSheetService> style_sheet_service;
  34     static const nsCID style_sheet_service_cid = {
  35         // NS_STYLESHEETSERVICE_CID copied from
  36         // layout/base/nsStyleSheetService.cpp
  37         0xfcca6f83, 0x9f7d, 0x44e4,
  38         {0xa7, 0x4b, 0xb5, 0x94, 0x33, 0xe6, 0xc8, 0xc3}
  39     };
  40     check(CallGetService<nsIStyleSheetService>(
  41               style_sheet_service_cid, getter_AddRefs(style_sheet_service)));
  42     check(style_sheet_service->LoadAndRegisterSheet(
  43               style_sheet_uri, nsIStyleSheetService::USER_SHEET));
  44
  45     return agent_style_sheet_holder();
  46 }
  47
  48 #else // Mozilla version < 1.8
  49
  50 already_AddRefed<nsIStyleSheet> init_agent_style_sheet(const char * uri)
  51 {
  52     nsCOMPtr<nsICSSLoader> css_loader;
  53     static const nsCID css_loader_cid = NS_CSS_LOADER_CID;
  54     check(CallGetService<nsICSSLoader>(css_loader_cid,
  55                                        getter_AddRefs(css_loader)));
  56
  57     nsCOMPtr<nsIURI> style_sheet_uri;
  58     check(NS_NewURI(getter_AddRefs(style_sheet_uri), nsCString(uri)));
  59
  60     nsICSSStyleSheet * style_sheet;
  61     check(css_loader->LoadAgentSheet(style_sheet_uri, &style_sheet));
  62     return style_sheet;
  63 }
  64
  65 // Apply a style-sheet to a given presentation shell as the top-priority
  66 // agent style-sheet and disable the preferences-derived style rules.
  67 void apply_agent_style_sheet(nsIStyleSheet * style_sheet,
  68                              nsIPresShell * pres_shell)
  69 {
  70     nsCOMArray<nsIStyleSheet> style_sheets;
  71     check(pres_shell->GetAgentStyleSheets(style_sheets));
  72     check(style_sheets.InsertObjectAt(style_sheet, 0));
  73     check(pres_shell->SetAgentStyleSheets(style_sheets));
  74
  75     check(pres_shell->EnablePrefStyleRules(false));
  76
  77     // Update the display
  78     check(pres_shell->ReconstructStyleData());
  79     check(pres_shell->FlushPendingNotifications(true));
  80 }
  81
  82 #endif // Mozilla version >=/< 1.8