зеркало из https://github.com/mozilla/gecko-dev.git
692 строки
17 KiB
C++
692 строки
17 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIPref.h"
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#include "nsILinkHandler.h"
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#include "nsIStyleSet.h"
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#include "nsFrameImageLoader.h"
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#include "nsIImageGroup.h"
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#include "nsIFrame.h"
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#include "nsIRenderingContext.h"
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#include "nsEventStateManager.h"
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#include "nsIURL.h"
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#include "nsIURLGroup.h"
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#include "nsIDocument.h"
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#include "nsIFrame.h"
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#include "nsIStyleContext.h"
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#include "nsLayoutAtoms.h"
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#ifdef DEBUG
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#undef NOISY_IMAGES
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#else
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#undef NOISY_IMAGES
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#endif
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int
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PrefChangedCallback(const char* aPrefName, void* instance_data)
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{
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nsPresContext* presContext = (nsPresContext*)instance_data;
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NS_ASSERTION(nsnull != presContext, "bad instance data");
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if (nsnull != presContext) {
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presContext->PreferenceChanged(aPrefName);
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}
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return 0; // PREF_OK
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}
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static NS_DEFINE_IID(kIPresContextIID, NS_IPRESCONTEXT_IID);
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nsPresContext::nsPresContext()
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: mDefaultFont("Times", NS_FONT_STYLE_NORMAL,
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NS_FONT_VARIANT_NORMAL,
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NS_FONT_WEIGHT_NORMAL,
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0,
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NSIntPointsToTwips(12)),
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mDefaultFixedFont("Courier", NS_FONT_STYLE_NORMAL,
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NS_FONT_VARIANT_NORMAL,
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NS_FONT_WEIGHT_NORMAL,
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0,
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NSIntPointsToTwips(10))
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{
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NS_INIT_REFCNT();
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nsLayoutAtoms::AddrefAtoms();
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mCompatibilityMode = eCompatibility_NavQuirks;
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#ifdef _WIN32
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// XXX This needs to be elsewhere, e.g., part of nsIDeviceContext
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mDefaultColor = ::GetSysColor(COLOR_WINDOWTEXT);
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mDefaultBackgroundColor = ::GetSysColor(COLOR_WINDOW);
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#else
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mDefaultColor = NS_RGB(0x00, 0x00, 0x00);
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mDefaultBackgroundColor = NS_RGB(0xFF, 0xFF, 0xFF);
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#endif
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}
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nsPresContext::~nsPresContext()
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{
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mShell = nsnull;
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Stop();
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if (nsnull != mImageGroup) {
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// Interrupt any loading images. This also stops all looping
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// image animations.
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mImageGroup->Interrupt();
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NS_RELEASE(mImageGroup);
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}
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NS_IF_RELEASE(mLinkHandler);
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NS_IF_RELEASE(mContainer);
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if (nsnull != mEventManager) {
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mEventManager->SetPresContext(nsnull);
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NS_RELEASE(mEventManager);
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}
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NS_IF_RELEASE(mDeviceContext);
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// Unregister preference callbacks
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if (nsnull != mPrefs) {
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mPrefs->UnregisterCallback("browser.", PrefChangedCallback, (void*)this);
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mPrefs->UnregisterCallback("intl.font2.", PrefChangedCallback, (void*)this);
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}
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NS_IF_RELEASE(mPrefs);
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NS_IF_RELEASE(mBaseURL);
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nsLayoutAtoms::ReleaseAtoms();
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}
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nsrefcnt
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nsPresContext::AddRef(void)
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{
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return ++mRefCnt;
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}
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nsrefcnt
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nsPresContext::Release(void)
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{
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NS_PRECONDITION(0 != mRefCnt, "bad refcnt");
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if (--mRefCnt == 0) {
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delete this;
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return 0;
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}
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return mRefCnt;
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}
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NS_IMPL_QUERY_INTERFACE(nsPresContext, kIPresContextIID);
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void
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nsPresContext::GetUserPreferences()
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{
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int32 prefInt;
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char prefChar[512];
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int charSize = sizeof(prefChar);
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if (NS_OK == mPrefs->GetIntPref("browser.base_font_scaler", &prefInt)) {
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mFontScaler = prefInt;
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}
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// XXX these font prefs strings don't take font encoding into account
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if (NS_OK == mPrefs->GetCharPref("intl.font2.win.prop_font", &(prefChar[0]), &charSize)) {
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mDefaultFont.name = prefChar;
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}
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if (NS_OK == mPrefs->GetIntPref("intl.font2.win.prop_size", &prefInt)) {
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mDefaultFont.size = NSIntPointsToTwips(prefInt);
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}
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if (NS_OK == mPrefs->GetCharPref("intl.font2.win.fixed_font", &(prefChar[0]), &charSize)) {
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mDefaultFixedFont.name = prefChar;
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}
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if (NS_OK == mPrefs->GetIntPref("intl.font2.win.fixed_size", &prefInt)) {
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mDefaultFixedFont.size = NSIntPointsToTwips(prefInt);
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}
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if (NS_OK == mPrefs->GetIntPref("nglayout.compatibility.mode", &prefInt)) {
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mCompatibilityMode = (enum nsCompatibility)prefInt; // bad cast
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}
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PRBool usePrefColors = PR_TRUE;
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#ifdef _WIN32
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XP_Bool boolPref;
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// XXX Is Windows the only platform that uses this?
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if (NS_OK == mPrefs->GetBoolPref("browser.wfe.use_windows_colors", &boolPref)) {
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usePrefColors = !PRBool(boolPref);
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}
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#endif
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if (usePrefColors) {
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uint32 colorPref;
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if (NS_OK == mPrefs->GetColorPrefDWord("browser.foreground_color", &colorPref)) {
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mDefaultColor = (nscolor)colorPref;
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}
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if (NS_OK == mPrefs->GetColorPrefDWord("browser.background_color", &colorPref)) {
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mDefaultBackgroundColor = (nscolor)colorPref;
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}
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}
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}
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void
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nsPresContext::PreferenceChanged(const char* aPrefName)
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{
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// Initialize our state from the user preferences
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GetUserPreferences();
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// Have the root frame's style context remap its style based on the
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// user preferences
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nsIFrame* rootFrame;
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nsIStyleContext* rootStyleContext;
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mShell->GetRootFrame(rootFrame);
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if (nsnull != rootFrame) {
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rootFrame->GetStyleContext(rootStyleContext);
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rootStyleContext->RemapStyle(this);
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NS_RELEASE(rootStyleContext);
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// Force a reflow of the root frame
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// XXX We really should only do a reflow if a preference that affects
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// formatting changed, e.g., a font change. If it's just a color change
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// then we only need to repaint...
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mShell->StyleChangeReflow();
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}
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}
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NS_IMETHODIMP
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nsPresContext::Init(nsIDeviceContext* aDeviceContext, nsIPref* aPrefs)
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{
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NS_ASSERTION(!(mInitialized == PR_TRUE), "attempt to reinit pres context");
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mDeviceContext = aDeviceContext;
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NS_IF_ADDREF(mDeviceContext);
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mPrefs = aPrefs;
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NS_IF_ADDREF(mPrefs);
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if (nsnull != mPrefs) {
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// Register callbacks so we're notified when the preferences change
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mPrefs->RegisterCallback("browser.", PrefChangedCallback, (void*)this);
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mPrefs->RegisterCallback("intl.font2.", PrefChangedCallback, (void*)this);
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// Initialize our state from the user preferences
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GetUserPreferences();
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}
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#ifdef DEBUG
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mInitialized = PR_TRUE;
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#endif
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return NS_OK;
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}
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// Note: We don't hold a reference on the shell; it has a reference to
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// us
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NS_IMETHODIMP
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nsPresContext::SetShell(nsIPresShell* aShell)
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{
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NS_IF_RELEASE(mBaseURL);
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mShell = aShell;
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if (nsnull != mShell) {
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nsIDocument* doc = mShell->GetDocument();
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NS_ASSERTION(nsnull != doc, "expect document here");
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if (nsnull != doc) {
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mBaseURL = doc->GetDocumentURL();
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NS_RELEASE(doc);
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}
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}
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return NS_OK;
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}
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nsIPresShell*
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nsPresContext::GetShell()
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{
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NS_IF_ADDREF(mShell);
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return mShell;
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}
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NS_IMETHODIMP
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nsPresContext::GetPrefs(nsIPref*& aPrefs)
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{
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aPrefs = mPrefs;
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NS_IF_ADDREF(aPrefs);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetCompatibilityMode(nsCompatibility& aMode)
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{
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aMode = mCompatibilityMode;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::SetCompatibilityMode(nsCompatibility aMode)
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{
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mCompatibilityMode = aMode;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetBaseURL(nsIURL*& aURL)
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{
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NS_IF_ADDREF(mBaseURL);
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aURL = mBaseURL;
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return NS_OK;
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}
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nsIStyleContext*
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nsPresContext::ResolveStyleContextFor(nsIContent* aContent,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique)
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{
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nsIStyleContext* result = nsnull;
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nsIStyleSet* set = mShell->GetStyleSet();
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if (nsnull != set) {
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result = set->ResolveStyleFor(this, aContent, aParentContext, aForceUnique);
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NS_RELEASE(set);
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}
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return result;
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}
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nsIStyleContext*
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nsPresContext::ResolvePseudoStyleContextFor(nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique)
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{
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nsIStyleContext* result = nsnull;
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nsIStyleSet* set = mShell->GetStyleSet();
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if (nsnull != set) {
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result = set->ResolvePseudoStyleFor(this, aParentContent, aPseudoTag, aParentContext, aForceUnique);
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NS_RELEASE(set);
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}
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return result;
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}
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nsIStyleContext*
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nsPresContext::ProbePseudoStyleContextFor(nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique)
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{
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nsIStyleContext* result = nsnull;
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nsIStyleSet* set = mShell->GetStyleSet();
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if (nsnull != set) {
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result = set->ProbePseudoStyleFor(this, aParentContent, aPseudoTag, aParentContext, aForceUnique);
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NS_RELEASE(set);
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}
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return result;
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}
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nsIFontMetrics*
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nsPresContext::GetMetricsFor(const nsFont& aFont)
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{
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if (nsnull != mDeviceContext) {
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nsIFontMetrics* metrics;
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mDeviceContext->GetMetricsFor(aFont, metrics);
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return metrics;
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}
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return nsnull;
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}
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const nsFont&
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nsPresContext::GetDefaultFont(void)
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{
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return mDefaultFont;
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}
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const nsFont&
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nsPresContext::GetDefaultFixedFont(void)
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{
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return mDefaultFixedFont;
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}
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NS_IMETHODIMP
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nsPresContext::GetFontScaler(PRInt32& aResult)
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{
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aResult = mFontScaler;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::SetFontScaler(PRInt32 aScaler)
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{
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mFontScaler = aScaler;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetDefaultColor(nscolor& aColor)
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{
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aColor = mDefaultColor;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetDefaultBackgroundColor(nscolor& aColor)
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{
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aColor = mDefaultBackgroundColor;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::SetDefaultColor(const nscolor& aColor)
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{
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mDefaultColor = aColor;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::SetDefaultBackgroundColor(const nscolor& aColor)
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{
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mDefaultBackgroundColor = aColor;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetVisibleArea(nsRect& aResult)
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{
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aResult = mVisibleArea;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::SetVisibleArea(const nsRect& r)
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{
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mVisibleArea = r;
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return NS_OK;
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}
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float
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nsPresContext::GetPixelsToTwips() const
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{
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if (nsnull != mDeviceContext) {
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float p2t;
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mDeviceContext->GetDevUnitsToAppUnits(p2t);
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return p2t;
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}
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return 1.0f;
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}
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float
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nsPresContext::GetTwipsToPixels() const
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{
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if (nsnull != mDeviceContext) {
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float app2dev;
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mDeviceContext->GetAppUnitsToDevUnits(app2dev);
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return app2dev;
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}
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return 1.0f;
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}
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NS_IMETHODIMP nsPresContext :: GetScaledPixelsToTwips(float &aScale) const
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{
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if (nsnull != mDeviceContext)
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{
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float p2t, scale;
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mDeviceContext->GetDevUnitsToAppUnits(p2t);
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mDeviceContext->GetCanonicalPixelScale(scale);
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aScale = p2t * scale;
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}
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else
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aScale = 1.0f;
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return NS_OK;
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}
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nsIDeviceContext*
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nsPresContext::GetDeviceContext() const
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{
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NS_IF_ADDREF(mDeviceContext);
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return mDeviceContext;
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}
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NS_IMETHODIMP
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nsPresContext::GetImageGroup(nsIImageGroup*& aGroupResult)
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{
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if (nsnull == mImageGroup) {
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// Create image group
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nsresult rv = NS_NewImageGroup(&mImageGroup);
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if (NS_OK != rv) {
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return rv;
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}
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// Initialize the image group
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nsIURLGroup* urlGroup;
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rv = mBaseURL->GetURLGroup(&urlGroup);
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if (rv == NS_OK)
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rv = mImageGroup->Init(mDeviceContext, urlGroup);
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NS_IF_RELEASE(urlGroup);
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if (NS_OK != rv) {
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return rv;
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}
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}
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aGroupResult = mImageGroup;
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NS_IF_ADDREF(mImageGroup);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::StartLoadImage(const nsString& aURL,
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const nscolor* aBackgroundColor,
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nsIFrame* aTargetFrame,
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nsFrameImageLoaderCB aCallBack,
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PRBool aNeedSizeUpdate,
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nsIFrameImageLoader*& aLoaderResult)
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{
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if (mStopped) {
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return NS_OK;
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}
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#ifdef NOISY_IMAGES
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nsIDocument* doc = mShell->GetDocument();
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if (nsnull != doc) {
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nsIURL* url = doc->GetDocumentURL();
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if (nsnull != url) {
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printf("%s: ", url->GetSpec());
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NS_RELEASE(url);
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}
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NS_RELEASE(doc);
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}
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printf("%p: start load for %p (", this, aTargetFrame);
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fputs(aURL, stdout);
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printf(")\n");
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#endif
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aLoaderResult = nsnull;
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// Lookup image request in our loaders array. Note that we need
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// to get a loader that is observing the same image and that has
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// the same value for aNeedSizeUpdate.
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PRInt32 i, n = mImageLoaders.Count();
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nsIFrameImageLoader* loader;
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nsAutoString loaderURL;
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for (i = 0; i < n; i++) {
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loader = (nsIFrameImageLoader*) mImageLoaders.ElementAt(i);
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nsIFrame* targetFrame;
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loader->GetTargetFrame(targetFrame);
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if (targetFrame == aTargetFrame) {
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loader->GetURL(loaderURL);
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// XXX case doesn't matter for all of the url so using Equals
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// isn't quite right
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if (aURL.Equals(loaderURL)) {
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// Make sure the size update flags are the same, if not keep looking
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PRIntn status;
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loader->GetImageLoadStatus(status);
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PRBool wantSize = 0 != (status & NS_IMAGE_LOAD_STATUS_SIZE_REQUESTED);
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if (aNeedSizeUpdate == wantSize) {
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NS_ADDREF(loader);
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aLoaderResult = loader;
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return NS_OK;
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}
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}
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}
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}
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// Create image group if needed
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nsresult rv;
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if (nsnull == mImageGroup) {
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nsIImageGroup* group;
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rv = GetImageGroup(group);
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if (NS_OK != rv) {
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return rv;
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}
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NS_RELEASE(group);
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}
|
|
|
|
// We haven't seen that image before. Create a new loader and
|
|
// start it going.
|
|
rv = NS_NewFrameImageLoader(&loader);
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
mImageLoaders.AppendElement(loader);
|
|
|
|
rv = loader->Init(this, mImageGroup, aURL, aBackgroundColor, aTargetFrame,
|
|
aCallBack, aNeedSizeUpdate);
|
|
if (NS_OK != rv) {
|
|
mImageLoaders.RemoveElement(loader);
|
|
NS_RELEASE(loader);
|
|
return rv;
|
|
}
|
|
// Return the loader
|
|
NS_ADDREF(loader);
|
|
aLoaderResult = loader;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::Stop(void)
|
|
{
|
|
PRInt32 n = mImageLoaders.Count();
|
|
for (PRInt32 i = 0; i < n; i++) {
|
|
nsIFrameImageLoader* loader;
|
|
loader = (nsIFrameImageLoader*) mImageLoaders.ElementAt(i);
|
|
loader->StopImageLoad();
|
|
NS_RELEASE(loader);
|
|
}
|
|
mImageLoaders.Clear();
|
|
mStopped = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::StopLoadImage(nsIFrame* aForFrame)
|
|
{
|
|
nsIFrameImageLoader* loader;
|
|
PRInt32 i, n = mImageLoaders.Count();
|
|
for (i = 0; i < n;) {
|
|
loader = (nsIFrameImageLoader*) mImageLoaders.ElementAt(i);
|
|
nsIFrame* loaderFrame;
|
|
loader->GetTargetFrame(loaderFrame);
|
|
if (loaderFrame == aForFrame) {
|
|
#ifdef NOISY_IMAGES
|
|
nsIDocument* doc = mShell->GetDocument();
|
|
if (nsnull != doc) {
|
|
nsIURL* url = doc->GetDocumentURL();
|
|
if (nsnull != url) {
|
|
printf("%s: ", url->GetSpec());
|
|
NS_RELEASE(url);
|
|
}
|
|
NS_RELEASE(doc);
|
|
}
|
|
printf("%p: stop load for %p\n", this, aForFrame);
|
|
#endif
|
|
loader->StopImageLoad();
|
|
NS_RELEASE(loader);
|
|
mImageLoaders.RemoveElementAt(i);
|
|
n--;
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetLinkHandler(nsILinkHandler* aHandler)
|
|
{ // XXX should probably be a WEAK reference
|
|
NS_IF_RELEASE(mLinkHandler);
|
|
mLinkHandler = aHandler;
|
|
NS_IF_ADDREF(aHandler);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetLinkHandler(nsILinkHandler** aResult)
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
*aResult = mLinkHandler;
|
|
NS_IF_ADDREF(mLinkHandler);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetContainer(nsISupports* aHandler)
|
|
{ // XXX should most likely be a WEAK reference
|
|
NS_IF_RELEASE(mContainer);
|
|
mContainer = aHandler;
|
|
NS_IF_ADDREF(aHandler);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetContainer(nsISupports** aResult)
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
*aResult = mContainer;
|
|
NS_IF_ADDREF(mContainer);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetEventStateManager(nsIEventStateManager** aManager)
|
|
{
|
|
NS_PRECONDITION(nsnull != aManager, "null ptr");
|
|
if (nsnull == aManager) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
if (nsnull == mEventManager) {
|
|
nsresult rv = NS_NewEventStateManager(&mEventManager);
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
//Not refcnted, set null in destructor
|
|
mEventManager->SetPresContext(this);
|
|
|
|
*aManager = mEventManager;
|
|
NS_IF_ADDREF(mEventManager);
|
|
return NS_OK;
|
|
}
|
|
|
|
|