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Added precaching of images for script constructed images.

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This commit is contained in:
vidur%netscape.com 1999-05-07 00:08:21 +00:00
parent 443e8a76ef
commit 70bc9a9d5c
4 changed files with 372 additions and 18 deletions
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194
content/html/content/src/nsHTMLImageElement.cpp
View File

@ -26,14 +26,24 @@
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIHTMLAttributes.h"
#include "nsIJSScriptObject.h"
#include "nsIJSNativeInitializer.h"
#include "nsSize.h"
#include "nsIDocument.h"
#include "nsIDOMWindow.h"
#include "nsIDOMDocument.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIURL.h"
// XXX nav attrs: suppress
static NS_DEFINE_IID(kIDOMHTMLImageElementIID, NS_IDOMHTMLIMAGEELEMENT_IID);
static NS_DEFINE_IID(kIJSNativeInitializerIID, NS_IJSNATIVEINITIALIZER_IID);
static NS_DEFINE_IID(kIDOMWindowIID, NS_IDOMWINDOW_IID);
static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);
class nsHTMLImageElement : public nsIDOMHTMLImageElement,
public nsIScriptObjectOwner,
@ -93,7 +103,7 @@ public:
NS_IMPL_IDOMEVENTRECEIVER_USING_GENERIC(mInner)
// nsIContent
NS_IMPL_ICONTENT_USING_GENERIC(mInner)
NS_IMPL_ICONTENT_NO_SETDOCUMENT_USING_GENERIC(mInner)
// nsIHTMLContent
NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)
@ -113,6 +123,7 @@ public:
protected:
nsGenericHTMLLeafElement mInner;
nsIDocument* mOwnerDocument; // Only used if this is a script constructed image
};
nsresult
@ -133,10 +144,12 @@ nsHTMLImageElement::nsHTMLImageElement(nsIAtom* aTag)
{
NS_INIT_REFCNT();
mInner.Init(this, aTag);
mOwnerDocument = nsnull;
}
nsHTMLImageElement::~nsHTMLImageElement()
{
NS_IF_RELEASE(mOwnerDocument);
}
NS_IMPL_ADDREF(nsHTMLImageElement)
@ -162,9 +175,9 @@ nsHTMLImageElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
if (aIID.Equals(kIJSNativeInitializerIID)) {
nsIJSNativeInitializer* tmp = this;
*aInstancePtr = (void*) tmp;
AddRef();
NS_ADDREF_THIS();
return NS_OK;
}
}
return NS_NOINTERFACE;
}
@ -188,7 +201,6 @@ NS_IMPL_STRING_ATTR(nsHTMLImageElement, Height, height)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Hspace, hspace)
NS_IMPL_BOOL_ATTR(nsHTMLImageElement, IsMap, ismap)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, LongDesc, longdesc)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Src, src)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, UseMap, usemap)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Vspace, vspace)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Width, width)
@ -363,11 +375,6 @@ nsHTMLImageElement::Finalize(JSContext *aContext)
mInner.Finalize(aContext);
}
NS_IMETHODIMP
nsHTMLImageElement::Initialize(JSContext* aContext, PRUint32 argc, jsval *argv)
{
return NS_OK;
}
NS_IMETHODIMP
nsHTMLImageElement::GetStyleHintForAttributeChange(
@ -386,3 +393,172 @@ nsHTMLImageElement::GetStyleHintForAttributeChange(
}
return NS_OK;
}
NS_IMETHODIMP
nsHTMLImageElement::Initialize(JSContext* aContext,
PRUint32 argc,
jsval *argv)
{
nsresult result = NS_OK;
// XXX This element is created unattached to any document. Later
// on, it might be used to preload the image cache. For that, we
// need a document (actually a pres context). The only way to get
// one is to associate the image with one at creation time, through
// the JSContext passed in. This mechanism is **UGLY** and makes
// some hard assumptions about the relationship between JSContexts
// and documents.
nsIScriptContext* scriptContext;
scriptContext = (nsIScriptContext*)JS_GetContextPrivate(aContext);
if (nsnull != scriptContext) {
nsIScriptGlobalObject* globalObject = scriptContext->GetGlobalObject();
if (nsnull != globalObject) {
nsIDOMWindow* domWindow;
result = globalObject->QueryInterface(kIDOMWindowIID, (void**)&domWindow);
if (NS_SUCCEEDED(result)) {
nsIDOMDocument* domDocument;
result = domWindow->GetDocument(&domDocument);
if (NS_SUCCEEDED(result)) {
// Maintain the reference
result = domDocument->QueryInterface(kIDocumentIID,
(void**)&mOwnerDocument);
NS_RELEASE(domDocument);
}
NS_RELEASE(domWindow);
}
}
}
if (NS_SUCCEEDED(result) && (argc > 0)) {
// The first (optional) argument is the width of the image
int32 width;
JSBool ret = JS_ValueToInt32(aContext, argv[0], &width);
if (ret) {
nsHTMLValue widthVal((PRInt32)width, eHTMLUnit_Integer);
result = mInner.SetHTMLAttribute(nsHTMLAtoms::width,
widthVal, PR_FALSE);
if (NS_SUCCEEDED(result) && (argc > 1)) {
// The second (optional) argument is the height of the image
int32 height;
ret = JS_ValueToInt32(aContext, argv[1], &height);
if (ret) {
nsHTMLValue heightVal((PRInt32)height, eHTMLUnit_Integer);
result = mInner.SetHTMLAttribute(nsHTMLAtoms::height,
heightVal, PR_FALSE);
}
else {
result = NS_ERROR_INVALID_ARG;
}
}
}
else {
result = NS_ERROR_INVALID_ARG;
}
}
return result;
}
NS_IMETHODIMP
nsHTMLImageElement::SetDocument(nsIDocument* aDocument,
PRBool aDeep)
{
// If we've been added to the document, we can get rid of
// our owner document reference so as to avoid a circular
// reference.
NS_IF_RELEASE(mOwnerDocument);
return mInner.SetDocument(aDocument, aDeep);
}
NS_IMETHODIMP
nsHTMLImageElement::GetSrc(nsString& aSrc)
{
mInner.GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::src, aSrc);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLImageElement::SetSrc(const nsString& aSrc)
{
nsresult result = NS_OK;
if (nsnull != mOwnerDocument) {
PRInt32 i, count = mOwnerDocument->GetNumberOfShells();
nsIPresShell* shell;
for (i = 0; i < count; i++) {
shell = mOwnerDocument->GetShellAt(i);
if (nsnull != shell) {
nsIPresContext* context;
result = shell->GetPresContext(&context);
if (NS_SUCCEEDED(result)) {
nsSize size;
nsHTMLValue val;
float p2t;
context->GetScaledPixelsToTwips(&p2t);
result = mInner.GetHTMLAttribute(nsHTMLAtoms::width, val);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
size.width = NSIntPixelsToTwips(val.GetIntValue(), p2t);
}
else {
size.width = 0;
}
result = mInner.GetHTMLAttribute(nsHTMLAtoms::height, val);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
size.height = NSIntPixelsToTwips(val.GetIntValue(), p2t);
}
else {
size.height = 0;
}
nsAutoString url, empty;
nsIURL* baseURL;
empty.Truncate();
result = mOwnerDocument->GetBaseURL(baseURL);
if (NS_SUCCEEDED(result)) {
result = NS_MakeAbsoluteURL(baseURL, empty, aSrc, url);
if (NS_FAILED(result)) {
url = aSrc;
}
NS_RELEASE(baseURL);
}
else {
url = aSrc;
}
nsSize* specifiedSize = nsnull;
if ((size.width > 0) || (size.height > 0)) {
specifiedSize = &size;
}
// Start the image loading. We don't care about notification
// or holding on to the image loader.
result = context->StartLoadImage(url, nsnull, specifiedSize,
nsnull, nsnull, nsnull,
nsnull);
NS_RELEASE(context);
}
NS_RELEASE(shell);
}
}
// Only do this the first time since it's only there for
// backwards compatability
NS_RELEASE(mOwnerDocument);
}
if (NS_SUCCEEDED(result)) {
result = mInner.SetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::src, aSrc, PR_TRUE);
}
return result;
}

1
content/html/content/src/nsHTMLSelectElement.cpp
View File

@ -755,6 +755,7 @@ NS_IMPL_RELEASE_INHERITED(nsOptionList, nsGenericDOMHTMLCollection)
nsresult
nsOptionList::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (!aInstancePtr) return NS_ERROR_NULL_POINTER;
if (aIID.Equals(kIJSScriptObjectIID)) {
*aInstancePtr = (void*)(nsIJSScriptObject*) this;
NS_ADDREF_THIS();

194
layout/html/content/src/nsHTMLImageElement.cpp
View File

@ -26,14 +26,24 @@
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIHTMLAttributes.h"
#include "nsIJSScriptObject.h"
#include "nsIJSNativeInitializer.h"
#include "nsSize.h"
#include "nsIDocument.h"
#include "nsIDOMWindow.h"
#include "nsIDOMDocument.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIURL.h"
// XXX nav attrs: suppress
static NS_DEFINE_IID(kIDOMHTMLImageElementIID, NS_IDOMHTMLIMAGEELEMENT_IID);
static NS_DEFINE_IID(kIJSNativeInitializerIID, NS_IJSNATIVEINITIALIZER_IID);
static NS_DEFINE_IID(kIDOMWindowIID, NS_IDOMWINDOW_IID);
static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);
class nsHTMLImageElement : public nsIDOMHTMLImageElement,
public nsIScriptObjectOwner,
@ -93,7 +103,7 @@ public:
NS_IMPL_IDOMEVENTRECEIVER_USING_GENERIC(mInner)
// nsIContent
NS_IMPL_ICONTENT_USING_GENERIC(mInner)
NS_IMPL_ICONTENT_NO_SETDOCUMENT_USING_GENERIC(mInner)
// nsIHTMLContent
NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)
@ -113,6 +123,7 @@ public:
protected:
nsGenericHTMLLeafElement mInner;
nsIDocument* mOwnerDocument; // Only used if this is a script constructed image
};
nsresult
@ -133,10 +144,12 @@ nsHTMLImageElement::nsHTMLImageElement(nsIAtom* aTag)
{
NS_INIT_REFCNT();
mInner.Init(this, aTag);
mOwnerDocument = nsnull;
}
nsHTMLImageElement::~nsHTMLImageElement()
{
NS_IF_RELEASE(mOwnerDocument);
}
NS_IMPL_ADDREF(nsHTMLImageElement)
@ -162,9 +175,9 @@ nsHTMLImageElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
if (aIID.Equals(kIJSNativeInitializerIID)) {
nsIJSNativeInitializer* tmp = this;
*aInstancePtr = (void*) tmp;
AddRef();
NS_ADDREF_THIS();
return NS_OK;
}
}
return NS_NOINTERFACE;
}
@ -188,7 +201,6 @@ NS_IMPL_STRING_ATTR(nsHTMLImageElement, Height, height)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Hspace, hspace)
NS_IMPL_BOOL_ATTR(nsHTMLImageElement, IsMap, ismap)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, LongDesc, longdesc)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Src, src)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, UseMap, usemap)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Vspace, vspace)
NS_IMPL_STRING_ATTR(nsHTMLImageElement, Width, width)
@ -363,11 +375,6 @@ nsHTMLImageElement::Finalize(JSContext *aContext)
mInner.Finalize(aContext);
}
NS_IMETHODIMP
nsHTMLImageElement::Initialize(JSContext* aContext, PRUint32 argc, jsval *argv)
{
return NS_OK;
}
NS_IMETHODIMP
nsHTMLImageElement::GetStyleHintForAttributeChange(
@ -386,3 +393,172 @@ nsHTMLImageElement::GetStyleHintForAttributeChange(
}
return NS_OK;
}
NS_IMETHODIMP
nsHTMLImageElement::Initialize(JSContext* aContext,
PRUint32 argc,
jsval *argv)
{
nsresult result = NS_OK;
// XXX This element is created unattached to any document. Later
// on, it might be used to preload the image cache. For that, we
// need a document (actually a pres context). The only way to get
// one is to associate the image with one at creation time, through
// the JSContext passed in. This mechanism is **UGLY** and makes
// some hard assumptions about the relationship between JSContexts
// and documents.
nsIScriptContext* scriptContext;
scriptContext = (nsIScriptContext*)JS_GetContextPrivate(aContext);
if (nsnull != scriptContext) {
nsIScriptGlobalObject* globalObject = scriptContext->GetGlobalObject();
if (nsnull != globalObject) {
nsIDOMWindow* domWindow;
result = globalObject->QueryInterface(kIDOMWindowIID, (void**)&domWindow);
if (NS_SUCCEEDED(result)) {
nsIDOMDocument* domDocument;
result = domWindow->GetDocument(&domDocument);
if (NS_SUCCEEDED(result)) {
// Maintain the reference
result = domDocument->QueryInterface(kIDocumentIID,
(void**)&mOwnerDocument);
NS_RELEASE(domDocument);
}
NS_RELEASE(domWindow);
}
}
}
if (NS_SUCCEEDED(result) && (argc > 0)) {
// The first (optional) argument is the width of the image
int32 width;
JSBool ret = JS_ValueToInt32(aContext, argv[0], &width);
if (ret) {
nsHTMLValue widthVal((PRInt32)width, eHTMLUnit_Integer);
result = mInner.SetHTMLAttribute(nsHTMLAtoms::width,
widthVal, PR_FALSE);
if (NS_SUCCEEDED(result) && (argc > 1)) {
// The second (optional) argument is the height of the image
int32 height;
ret = JS_ValueToInt32(aContext, argv[1], &height);
if (ret) {
nsHTMLValue heightVal((PRInt32)height, eHTMLUnit_Integer);
result = mInner.SetHTMLAttribute(nsHTMLAtoms::height,
heightVal, PR_FALSE);
}
else {
result = NS_ERROR_INVALID_ARG;
}
}
}
else {
result = NS_ERROR_INVALID_ARG;
}
}
return result;
}
NS_IMETHODIMP
nsHTMLImageElement::SetDocument(nsIDocument* aDocument,
PRBool aDeep)
{
// If we've been added to the document, we can get rid of
// our owner document reference so as to avoid a circular
// reference.
NS_IF_RELEASE(mOwnerDocument);
return mInner.SetDocument(aDocument, aDeep);
}
NS_IMETHODIMP
nsHTMLImageElement::GetSrc(nsString& aSrc)
{
mInner.GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::src, aSrc);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLImageElement::SetSrc(const nsString& aSrc)
{
nsresult result = NS_OK;
if (nsnull != mOwnerDocument) {
PRInt32 i, count = mOwnerDocument->GetNumberOfShells();
nsIPresShell* shell;
for (i = 0; i < count; i++) {
shell = mOwnerDocument->GetShellAt(i);
if (nsnull != shell) {
nsIPresContext* context;
result = shell->GetPresContext(&context);
if (NS_SUCCEEDED(result)) {
nsSize size;
nsHTMLValue val;
float p2t;
context->GetScaledPixelsToTwips(&p2t);
result = mInner.GetHTMLAttribute(nsHTMLAtoms::width, val);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
size.width = NSIntPixelsToTwips(val.GetIntValue(), p2t);
}
else {
size.width = 0;
}
result = mInner.GetHTMLAttribute(nsHTMLAtoms::height, val);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
size.height = NSIntPixelsToTwips(val.GetIntValue(), p2t);
}
else {
size.height = 0;
}
nsAutoString url, empty;
nsIURL* baseURL;
empty.Truncate();
result = mOwnerDocument->GetBaseURL(baseURL);
if (NS_SUCCEEDED(result)) {
result = NS_MakeAbsoluteURL(baseURL, empty, aSrc, url);
if (NS_FAILED(result)) {
url = aSrc;
}
NS_RELEASE(baseURL);
}
else {
url = aSrc;
}
nsSize* specifiedSize = nsnull;
if ((size.width > 0) || (size.height > 0)) {
specifiedSize = &size;
}
// Start the image loading. We don't care about notification
// or holding on to the image loader.
result = context->StartLoadImage(url, nsnull, specifiedSize,
nsnull, nsnull, nsnull,
nsnull);
NS_RELEASE(context);
}
NS_RELEASE(shell);
}
}
// Only do this the first time since it's only there for
// backwards compatability
NS_RELEASE(mOwnerDocument);
}
if (NS_SUCCEEDED(result)) {
result = mInner.SetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::src, aSrc, PR_TRUE);
}
return result;
}

1
layout/html/content/src/nsHTMLSelectElement.cpp
View File

@ -755,6 +755,7 @@ NS_IMPL_RELEASE_INHERITED(nsOptionList, nsGenericDOMHTMLCollection)
nsresult
nsOptionList::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (!aInstancePtr) return NS_ERROR_NULL_POINTER;
if (aIID.Equals(kIJSScriptObjectIID)) {
*aInstancePtr = (void*)(nsIJSScriptObject*) this;
NS_ADDREF_THIS();