зеркало из https://github.com/mozilla/gecko-dev.git
1019 строки
25 KiB
C++
1019 строки
25 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "nsCOMPtr.h"
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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 "nsIFrameManager.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 "nsILoadGroup.h"
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#include "nsIDocument.h"
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#include "nsIStyleContext.h"
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#include "nsLayoutAtoms.h"
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#include "nsILookAndFeel.h"
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#include "nsWidgetsCID.h"
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#include "nsIComponentManager.h"
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#ifdef _WIN32
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#include <windows.h>
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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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static NS_DEFINE_IID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
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static NS_DEFINE_IID(kILookAndFeelIID, NS_ILOOKANDFEEL_IID);
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nsPresContext::nsPresContext()
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: mDefaultFont("serif", 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("monospace", 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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mCompatibilityMode = eCompatibility_Standard;
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mCompatibilityLocked = PR_FALSE;
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mWidgetRenderingMode = eWidgetRendering_Gfx;
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mLookAndFeel = nsnull;
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mShell = nsnull;
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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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mDefaultBackgroundImageAttachment = NS_STYLE_BG_ATTACHMENT_SCROLL;
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mDefaultBackgroundImageRepeat = NS_STYLE_BG_REPEAT_XY;
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mDefaultBackgroundImageOffsetX = mDefaultBackgroundImageOffsetY = 0;
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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 (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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}
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if (mEventManager)
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mEventManager->SetPresContext(nsnull); // unclear if this is needed, but can't hurt
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NS_IF_RELEASE(mLookAndFeel);
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// Unregister preference callbacks
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if (mPrefs) {
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mPrefs->UnregisterCallback("browser.", PrefChangedCallback, (void*)this);
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mPrefs->UnregisterCallback("font.", PrefChangedCallback, (void*)this);
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}
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}
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NS_IMPL_ISUPPORTS(nsPresContext, kIPresContextIID);
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void
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nsPresContext::GetFontPreferences()
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{
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if (mPrefs) {
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char* value = nsnull;
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mPrefs->CopyCharPref("font.default", &value);
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if (value) {
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mDefaultFont.name = value;
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nsAllocator::Free(value);
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value = nsnull;
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}
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if (mLangGroup) {
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nsAutoString pref("font.size.variable.");
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const PRUnichar* langGroup = nsnull;
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mLangGroup->GetUnicode(&langGroup);
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pref.Append(langGroup);
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char name[128];
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pref.ToCString(name, sizeof(name));
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PRInt32 variableSize = 16;
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mPrefs->GetIntPref(name, &variableSize);
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pref = "font.size.fixed.";
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pref.Append(langGroup);
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pref.ToCString(name, sizeof(name));
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PRInt32 fixedSize = 14;
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mPrefs->GetIntPref(name, &fixedSize);
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char* unit = nsnull;
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mPrefs->CopyCharPref("font.size.unit", &unit);
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char* defaultUnit = "px";
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if (!unit) {
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unit = defaultUnit;
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}
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if (!PL_strcmp(unit, "px")) {
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float p2t;
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GetScaledPixelsToTwips(&p2t);
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mDefaultFont.size = NSFloatPixelsToTwips((float) variableSize, p2t);
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mDefaultFixedFont.size = NSFloatPixelsToTwips((float) fixedSize, p2t);
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}
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else if (!PL_strcmp(unit, "pt")) {
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mDefaultFont.size = NSIntPointsToTwips(variableSize);
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mDefaultFixedFont.size = NSIntPointsToTwips(fixedSize);
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}
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else {
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float p2t;
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GetScaledPixelsToTwips(&p2t);
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mDefaultFont.size = NSFloatPixelsToTwips((float) variableSize, p2t);
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mDefaultFixedFont.size = NSFloatPixelsToTwips((float) fixedSize, p2t);
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}
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if (unit != defaultUnit) {
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nsAllocator::Free(unit);
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unit = nsnull;
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}
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}
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}
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}
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void
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nsPresContext::GetUserPreferences()
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{
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PRInt32 prefInt;
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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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if (NS_OK == mPrefs->GetIntPref("nglayout.compatibility.mode", &prefInt)) {
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// XXX this should really be a state on the webshell instead of using prefs
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switch (prefInt) {
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case 1:
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mCompatibilityLocked = PR_TRUE;
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mCompatibilityMode = eCompatibility_Standard;
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break;
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case 2:
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mCompatibilityLocked = PR_TRUE;
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mCompatibilityMode = eCompatibility_NavQuirks;
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break;
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case 0: // auto
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default:
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mCompatibilityLocked = PR_FALSE;
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break;
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}
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}
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else {
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mCompatibilityLocked = PR_FALSE; // auto
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}
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if (NS_OK == mPrefs->GetIntPref("nglayout.widget.mode", &prefInt)) {
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mWidgetRenderingMode = (enum nsWidgetRendering)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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PRBool 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 = !boolPref;
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}
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#endif
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if (usePrefColors) {
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PRUint32 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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GetFontPreferences();
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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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if (mDeviceContext) {
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mDeviceContext->FlushFontCache();
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}
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if (mShell) {
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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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mShell->GetRootFrame(&rootFrame);
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if (rootFrame) {
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nsIStyleContext* rootStyleContext;
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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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}
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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 = dont_QueryInterface(aDeviceContext);
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mPrefs = dont_QueryInterface(aPrefs);
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if (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("font.", 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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mShell = aShell;
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if (nsnull != mShell) {
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nsCOMPtr<nsIDocument> doc;
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if (NS_SUCCEEDED(mShell->GetDocument(getter_AddRefs(doc)))) {
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NS_ASSERTION(doc, "expect document here");
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if (doc) {
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doc->GetBaseURL(*getter_AddRefs(mBaseURL));
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NS_ASSERTION(mDeviceContext, "expect device context here");
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if (mDeviceContext) {
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nsAutoString charset;
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doc->GetDocumentCharacterSet(charset);
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mDeviceContext->GetLangGroup(charset, getter_AddRefs(mLangGroup));
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GetFontPreferences();
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}
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}
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetShell(nsIPresShell** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = mShell;
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NS_IF_ADDREF(mShell);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetPrefs(nsIPref** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = mPrefs;
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NS_IF_ADDREF(*aResult);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetCompatibilityMode(nsCompatibility* aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = 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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if (! mCompatibilityLocked) {
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mCompatibilityMode = aMode;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetWidgetRenderingMode(nsWidgetRendering* aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = mWidgetRenderingMode;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::SetWidgetRenderingMode(nsWidgetRendering aMode)
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{
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mWidgetRenderingMode = aMode;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetLookAndFeel(nsILookAndFeel** aLookAndFeel)
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{
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NS_PRECONDITION(nsnull != aLookAndFeel, "null ptr");
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if (nsnull == aLookAndFeel) {
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return NS_ERROR_NULL_POINTER;
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}
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nsresult result = NS_OK;
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if (! mLookAndFeel) {
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result = nsComponentManager::CreateInstance(kLookAndFeelCID, nsnull,
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kILookAndFeelIID, (void**)&mLookAndFeel);
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if (NS_FAILED(result)) {
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mLookAndFeel = nsnull;
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}
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}
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NS_IF_ADDREF(mLookAndFeel);
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*aLookAndFeel = mLookAndFeel;
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return result;
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}
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NS_IMETHODIMP
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nsPresContext::GetBaseURL(nsIURI** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = mBaseURL;
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NS_IF_ADDREF(*aResult);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::ResolveStyleContextFor(nsIContent* aContent,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique,
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nsIStyleContext** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIStyleContext* result = nsnull;
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nsCOMPtr<nsIStyleSet> set;
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nsresult rv = mShell->GetStyleSet(getter_AddRefs(set));
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if (NS_SUCCEEDED(rv)) {
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if (set) {
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result = set->ResolveStyleFor(this, aContent, aParentContext,
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aForceUnique);
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if (nsnull == result) {
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rv = NS_ERROR_OUT_OF_MEMORY;
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}
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}
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}
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*aResult = result;
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return rv;
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}
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NS_IMETHODIMP
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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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nsIStyleContext** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIStyleContext* result = nsnull;
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nsCOMPtr<nsIStyleSet> set;
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nsresult rv = mShell->GetStyleSet(getter_AddRefs(set));
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if (NS_SUCCEEDED(rv)) {
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if (set) {
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result = set->ResolvePseudoStyleFor(this, aParentContent, aPseudoTag,
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aParentContext, aForceUnique);
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if (nsnull == result) {
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rv = NS_ERROR_OUT_OF_MEMORY;
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}
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}
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}
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*aResult = result;
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return rv;
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}
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NS_IMETHODIMP
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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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nsIStyleContext** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIStyleContext* result = nsnull;
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nsCOMPtr<nsIStyleSet> set;
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nsresult rv = mShell->GetStyleSet(getter_AddRefs(set));
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if (NS_SUCCEEDED(rv)) {
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if (set) {
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result = set->ProbePseudoStyleFor(this, aParentContent, aPseudoTag,
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aParentContext, aForceUnique);
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}
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}
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*aResult = result;
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return rv;
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}
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NS_IMETHODIMP
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nsPresContext::ReParentStyleContext(nsIFrame* aFrame,
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nsIStyleContext* aNewParentContext)
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{
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NS_PRECONDITION(aFrame, "null ptr");
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if (! aFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsCOMPtr<nsIFrameManager> manager;
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nsresult rv = mShell->GetFrameManager(getter_AddRefs(manager));
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if (NS_SUCCEEDED(rv) && manager) {
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rv = manager->ReParentStyleContext(this, aFrame, aNewParentContext);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsPresContext::GetMetricsFor(const nsFont& aFont, nsIFontMetrics** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIFontMetrics* metrics = nsnull;
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if (mDeviceContext) {
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mDeviceContext->GetMetricsFor(aFont, mLangGroup, metrics);
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}
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*aResult = metrics;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPresContext::GetDefaultFont(nsFont& aResult)
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{
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aResult = mDefaultFont;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultFont(nsFont& aFont)
|
|
{
|
|
mDefaultFont = aFont;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDefaultFixedFont(nsFont& aResult)
|
|
{
|
|
aResult = mDefaultFixedFont;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultFixedFont(nsFont& aFont)
|
|
{
|
|
mDefaultFixedFont = aFont;
|
|
return NS_OK;
|
|
}
|
|
|
|
const nsFont&
|
|
nsPresContext::GetDefaultFontDeprecated()
|
|
{
|
|
return mDefaultFont;
|
|
}
|
|
|
|
const nsFont&
|
|
nsPresContext::GetDefaultFixedFontDeprecated()
|
|
{
|
|
return mDefaultFixedFont;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetFontScaler(PRInt32* aResult)
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
*aResult = mFontScaler;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetFontScaler(PRInt32 aScaler)
|
|
{
|
|
mFontScaler = aScaler;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDefaultColor(nscolor* aResult)
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
*aResult = mDefaultColor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDefaultBackgroundColor(nscolor* aResult)
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
*aResult = mDefaultBackgroundColor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDefaultBackgroundImage(nsString& aImage)
|
|
{
|
|
aImage = mDefaultBackgroundImage;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDefaultBackgroundImageRepeat(PRUint8* aRepeat)
|
|
{
|
|
NS_PRECONDITION(nsnull != aRepeat, "null ptr");
|
|
if (nsnull == aRepeat) { return NS_ERROR_NULL_POINTER; }
|
|
*aRepeat = mDefaultBackgroundImageRepeat;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDefaultBackgroundImageOffset(nscoord* aX, nscoord* aY)
|
|
{
|
|
NS_PRECONDITION((nsnull != aX) && (nsnull != aY), "null ptr");
|
|
if (!aX || !aY) { return NS_ERROR_NULL_POINTER; }
|
|
*aX = mDefaultBackgroundImageOffsetX;
|
|
*aY = mDefaultBackgroundImageOffsetY;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDefaultBackgroundImageAttachment(PRUint8* aAttachment)
|
|
{
|
|
NS_PRECONDITION(nsnull != aAttachment, "null ptr");
|
|
if (nsnull == aAttachment) { return NS_ERROR_NULL_POINTER; }
|
|
*aAttachment = mDefaultBackgroundImageAttachment;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultColor(nscolor aColor)
|
|
{
|
|
mDefaultColor = aColor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultBackgroundColor(nscolor aColor)
|
|
{
|
|
mDefaultBackgroundColor = aColor;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultBackgroundImage(const nsString& aImage)
|
|
{
|
|
mDefaultBackgroundImage = aImage;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultBackgroundImageRepeat(PRUint8 aRepeat)
|
|
{
|
|
mDefaultBackgroundImageRepeat = aRepeat;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultBackgroundImageOffset(nscoord aX, nscoord aY)
|
|
{
|
|
mDefaultBackgroundImageOffsetX = aX;
|
|
mDefaultBackgroundImageOffsetY = aY;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetDefaultBackgroundImageAttachment(PRUint8 aAttachment)
|
|
{
|
|
mDefaultBackgroundImageAttachment = aAttachment;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetVisibleArea(nsRect& aResult)
|
|
{
|
|
aResult = mVisibleArea;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetVisibleArea(const nsRect& r)
|
|
{
|
|
mVisibleArea = r;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetPixelsToTwips(float* aResult) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
float p2t = 1.0f;
|
|
if (mDeviceContext) {
|
|
mDeviceContext->GetDevUnitsToAppUnits(p2t);
|
|
}
|
|
*aResult = p2t;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetTwipsToPixels(float* aResult) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
float app2dev = 1.0f;
|
|
if (mDeviceContext) {
|
|
mDeviceContext->GetAppUnitsToDevUnits(app2dev);
|
|
}
|
|
*aResult = app2dev;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetScaledPixelsToTwips(float* aResult) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
float scale = 1.0f;
|
|
if (mDeviceContext)
|
|
{
|
|
float p2t;
|
|
mDeviceContext->GetDevUnitsToAppUnits(p2t);
|
|
mDeviceContext->GetCanonicalPixelScale(scale);
|
|
scale = p2t * scale;
|
|
}
|
|
*aResult = scale;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetDeviceContext(nsIDeviceContext** aResult) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
*aResult = mDeviceContext;
|
|
NS_IF_ADDREF(*aResult);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::GetImageGroup(nsIImageGroup** aResult)
|
|
{
|
|
NS_PRECONDITION(nsnull != aResult, "null ptr");
|
|
if (nsnull == aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
if (!mImageGroup) {
|
|
// Create image group
|
|
nsresult rv = NS_NewImageGroup(getter_AddRefs(mImageGroup));
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
|
|
// Initialize the image group
|
|
nsCOMPtr<nsILoadGroup> loadGroup;
|
|
nsCOMPtr<nsIDocument> doc;
|
|
if (NS_SUCCEEDED(mShell->GetDocument(getter_AddRefs(doc)))) {
|
|
NS_ASSERTION(doc, "expect document here");
|
|
if (doc) {
|
|
doc->GetDocumentLoadGroup(getter_AddRefs(loadGroup));
|
|
}
|
|
}
|
|
if (rv == NS_OK)
|
|
rv = mImageGroup->Init(mDeviceContext, loadGroup);
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
*aResult = mImageGroup;
|
|
NS_IF_ADDREF(*aResult);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::StartLoadImage(const nsString& aURL,
|
|
const nscolor* aBackgroundColor,
|
|
const nsSize* aDesiredSize,
|
|
nsIFrame* aTargetFrame,
|
|
nsIFrameImageLoaderCB aCallBack,
|
|
void* aClosure,
|
|
nsIFrameImageLoader** aResult)
|
|
{
|
|
if (mStopped) {
|
|
if (aResult) {
|
|
*aResult = nsnull;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Allow for a null target frame argument (for precached images)
|
|
if (nsnull != aTargetFrame) {
|
|
// Mark frame as having loaded an image
|
|
nsFrameState state;
|
|
aTargetFrame->GetFrameState(&state);
|
|
state |= NS_FRAME_HAS_LOADED_IMAGES;
|
|
aTargetFrame->SetFrameState(state);
|
|
}
|
|
|
|
// Lookup image request in our loaders array (maybe the load request
|
|
// has already been made for that url at the desired size).
|
|
PRInt32 i, n = mImageLoaders.Count();
|
|
nsIFrameImageLoader* loader;
|
|
for (i = 0; i < n; i++) {
|
|
PRBool same;
|
|
loader = (nsIFrameImageLoader*) mImageLoaders.ElementAt(i);
|
|
loader->IsSameImageRequest(aURL, aBackgroundColor, aDesiredSize, &same);
|
|
if (same) {
|
|
// This is pretty sick, but because we can get a notification
|
|
// *before* the caller has returned we have to store into
|
|
// aResult before calling the AddFrame method.
|
|
if (aResult) {
|
|
NS_ADDREF(loader);
|
|
*aResult = loader;
|
|
}
|
|
|
|
// Add frame to list of interested frames for this loader
|
|
loader->AddFrame(aTargetFrame, aCallBack, aClosure);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
// Create image group if needed
|
|
nsresult rv;
|
|
if (!mImageGroup) {
|
|
nsCOMPtr<nsIImageGroup> group;
|
|
rv = GetImageGroup(getter_AddRefs(group)); // sets mImageGroup as side effect
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
|
|
// This is pretty sick, but because we can get a notification
|
|
// *before* the caller has returned we have to store into aResult
|
|
// before calling the loaders init method.
|
|
if (aResult) {
|
|
*aResult = loader;
|
|
NS_ADDREF(loader);
|
|
}
|
|
|
|
rv = loader->Init(this, mImageGroup, aURL, aBackgroundColor, aDesiredSize,
|
|
aTargetFrame, aCallBack, aClosure);
|
|
if (NS_OK != rv) {
|
|
mImageLoaders.RemoveElement(loader);
|
|
loader->StopImageLoad();
|
|
NS_RELEASE(loader);
|
|
|
|
// Undo premature store of reslut
|
|
if (aResult) {
|
|
*aResult = nsnull;
|
|
NS_RELEASE(loader);
|
|
}
|
|
return rv;
|
|
}
|
|
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* aTargetFrame,
|
|
nsIFrameImageLoader* aLoader)
|
|
{
|
|
PRInt32 i, n = mImageLoaders.Count();
|
|
nsIFrameImageLoader* loader;
|
|
for (i = 0; i < n; i++) {
|
|
loader = (nsIFrameImageLoader*) mImageLoaders.ElementAt(i);
|
|
if (loader == aLoader) {
|
|
// Remove frame from list of interested frames for this loader
|
|
loader->RemoveFrame(aTargetFrame);
|
|
|
|
// If loader is no longer loading for anybody and its safe to
|
|
// nuke it, nuke it.
|
|
PRBool safe;
|
|
loader->SafeToDestroy(&safe);
|
|
if (safe) {
|
|
loader->StopImageLoad();
|
|
NS_RELEASE(loader);
|
|
mImageLoaders.RemoveElementAt(i);
|
|
n--;
|
|
i--;
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::StopAllLoadImagesFor(nsIFrame* aTargetFrame)
|
|
{
|
|
nsFrameState state;
|
|
aTargetFrame->GetFrameState(&state);
|
|
if (NS_FRAME_HAS_LOADED_IMAGES & state) {
|
|
nsIFrameImageLoader* loader;
|
|
PRInt32 i, n = mImageLoaders.Count();
|
|
for (i = 0; i < n; i++) {
|
|
PRBool safe;
|
|
loader = (nsIFrameImageLoader*) mImageLoaders.ElementAt(i);
|
|
loader->RemoveFrame(aTargetFrame);
|
|
loader->SafeToDestroy(&safe);
|
|
if (safe) {
|
|
loader->StopImageLoad();
|
|
NS_RELEASE(loader);
|
|
mImageLoaders.RemoveElementAt(i);
|
|
n--;
|
|
i--;
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPresContext::SetLinkHandler(nsILinkHandler* aHandler)
|
|
{
|
|
mLinkHandler = 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)
|
|
{
|
|
mContainer = 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 (!mEventManager) {
|
|
nsresult rv = NS_NewEventStateManager(getter_AddRefs(mEventManager));
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
//Not refcnted, set null in destructor
|
|
mEventManager->SetPresContext(this);
|
|
|
|
*aManager = mEventManager;
|
|
NS_IF_ADDREF(*aManager);
|
|
return NS_OK;
|
|
}
|