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nsHTMLButtonElement.cpp
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nsHTMLButtonElement.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIDOMHTMLButtonElement.h"
#include "nsIDOMNSHTMLButtonElement.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLAtoms.h"
#include "nsIPresShell.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIFormControl.h"
#include "nsIForm.h"
#include "nsIFormSubmission.h"
#include "nsIURL.h"
#include "nsIFrame.h"
#include "nsIFormControlFrame.h"
#include "nsIEventStateManager.h"
#include "nsIDOMEvent.h"
#include "nsIDOMNSEvent.h"
#include "nsISizeOfHandler.h"
#include "nsIDocument.h"
#include "nsGUIEvent.h"
#include "nsUnicharUtils.h"
class nsHTMLButtonElement : public nsGenericHTMLContainerFormElement,
public nsIDOMHTMLButtonElement,
public nsIDOMNSHTMLButtonElement
{
public:
nsHTMLButtonElement();
virtual ~nsHTMLButtonElement();
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
// nsIDOMNode
NS_FORWARD_NSIDOMNODE_NO_CLONENODE(nsGenericHTMLContainerFormElement::)
// nsIDOMElement
NS_FORWARD_NSIDOMELEMENT(nsGenericHTMLContainerFormElement::)
// nsIDOMHTMLElement
NS_FORWARD_NSIDOMHTMLELEMENT(nsGenericHTMLContainerElement::)
// nsIDOMHTMLButtonElement
NS_DECL_NSIDOMHTMLBUTTONELEMENT
// nsIDOMNSHTMLButtonElement
NS_DECL_NSIDOMNSHTMLBUTTONELEMENT
// overrided nsIFormControl method
NS_IMETHOD_(PRInt32) GetType() { return mType; }
NS_IMETHOD Reset();
NS_IMETHOD SubmitNamesValues(nsIFormSubmission* aFormSubmission,
nsIContent* aSubmitElement);
// nsIContent overrides...
NS_IMETHOD GetAttribute(PRInt32 aNameSpaceID, nsIAtom* aName,
nsAString& aResult) const;
NS_IMETHOD SetAttribute(PRInt32 aNameSpaceID, nsIAtom* aName,
const nsAString& aValue, PRBool aNotify);
NS_IMETHOD SetFocus(nsIPresContext* aPresContext);
NS_IMETHOD RemoveFocus(nsIPresContext* aPresContext);
NS_IMETHOD StringToAttribute(nsIAtom* aAttribute,
const nsAString& aValue,
nsHTMLValue& aResult);
NS_IMETHOD AttributeToString(nsIAtom* aAttribute,
const nsHTMLValue& aValue,
nsAString& aResult) const;
NS_IMETHOD HandleDOMEvent(nsIPresContext* aPresContext,
nsEvent* aEvent,
nsIDOMEvent** aDOMEvent,
PRUint32 aFlags,
nsEventStatus* aEventStatus);
#ifdef DEBUG
NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const;
#endif
protected:
PRInt8 mType;
PRPackedBool mHandlingClick;
private:
// The analogue of defaultValue in the DOM for input and textarea
nsresult SetDefaultValue(const nsAString& aDefaultValue);
nsresult GetDefaultValue(nsAString& aDefaultValue);
};
// Construction, destruction
nsresult
NS_NewHTMLButtonElement(nsIHTMLContent** aInstancePtrResult,
nsINodeInfo *aNodeInfo)
{
NS_ENSURE_ARG_POINTER(aInstancePtrResult);
nsHTMLButtonElement* it = new nsHTMLButtonElement();
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsresult rv = NS_STATIC_CAST(nsGenericElement *, it)->Init(aNodeInfo);
if (NS_FAILED(rv)) {
delete it;
return rv;
}
*aInstancePtrResult = NS_STATIC_CAST(nsIHTMLContent *, it);
NS_ADDREF(*aInstancePtrResult);
return NS_OK;
}
nsHTMLButtonElement::nsHTMLButtonElement()
{
mType = NS_FORM_BUTTON_SUBMIT; // default
mHandlingClick = PR_FALSE;
}
nsHTMLButtonElement::~nsHTMLButtonElement()
{
}
// nsISupports
NS_IMPL_ADDREF_INHERITED(nsHTMLButtonElement, nsGenericElement);
NS_IMPL_RELEASE_INHERITED(nsHTMLButtonElement, nsGenericElement);
// QueryInterface implementation for nsHTMLButtonElement
NS_HTML_CONTENT_INTERFACE_MAP_BEGIN(nsHTMLButtonElement,
nsGenericHTMLContainerFormElement)
NS_INTERFACE_MAP_ENTRY(nsIDOMHTMLButtonElement)
NS_INTERFACE_MAP_ENTRY(nsIDOMNSHTMLButtonElement)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(HTMLButtonElement)
NS_HTML_CONTENT_INTERFACE_MAP_END
NS_IMETHODIMP
nsHTMLButtonElement::GetAttribute(PRInt32 aNameSpaceID, nsIAtom* aName,
nsAString& aResult) const
{
if (aName == nsHTMLAtoms::disabled) {
nsresult rv = nsGenericHTMLContainerFormElement::GetAttr(kNameSpaceID_None, nsHTMLAtoms::disabled, aResult);
if (rv == NS_CONTENT_ATTR_NOT_THERE) {
aResult.Assign(NS_LITERAL_STRING("false"));
} else {
aResult.Assign(NS_LITERAL_STRING("true"));
}
return rv;
}
return nsGenericHTMLContainerFormElement::GetAttr(aNameSpaceID, aName,
aResult);
}
NS_IMETHODIMP
nsHTMLButtonElement::SetAttribute(PRInt32 aNameSpaceID, nsIAtom* aName,
const nsAString& aValue,
PRBool aNotify)
{
nsAutoString value(aValue);
if (aName == nsHTMLAtoms::disabled &&
value.Equals(NS_LITERAL_STRING("false"), nsCaseInsensitiveStringComparator())) {
return UnsetAttr(aNameSpaceID, aName, aNotify);
}
return nsGenericHTMLContainerFormElement::SetAttr(aNameSpaceID, aName,
aValue, aNotify);
}
// nsIDOMHTMLButtonElement
nsresult
nsHTMLButtonElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
{
NS_ENSURE_ARG_POINTER(aReturn);
*aReturn = nsnull;
nsHTMLButtonElement* it = new nsHTMLButtonElement();
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsCOMPtr<nsIDOMNode> kungFuDeathGrip(it);
nsresult rv = NS_STATIC_CAST(nsGenericElement *, it)->Init(mNodeInfo);
if (NS_FAILED(rv))
return rv;
CopyInnerTo(this, it, aDeep);
*aReturn = NS_STATIC_CAST(nsIDOMNode *, it);
NS_ADDREF(*aReturn);
return NS_OK;
}
// nsIDOMHTMLButtonElement
NS_IMETHODIMP
nsHTMLButtonElement::GetForm(nsIDOMHTMLFormElement** aForm)
{
return nsGenericHTMLContainerFormElement::GetForm(aForm);
}
NS_IMETHODIMP
nsHTMLButtonElement::GetType(nsAString& aType)
{
return AttributeToString(nsHTMLAtoms::type,
nsHTMLValue(mType, eHTMLUnit_Enumerated),
aType);
}
NS_IMPL_STRING_ATTR(nsHTMLButtonElement, AccessKey, accesskey)
NS_IMPL_BOOL_ATTR(nsHTMLButtonElement, Disabled, disabled)
NS_IMPL_STRING_ATTR(nsHTMLButtonElement, Name, name)
NS_IMPL_INT_ATTR(nsHTMLButtonElement, TabIndex, tabindex)
NS_IMPL_STRING_ATTR(nsHTMLButtonElement, Value, value)
NS_IMETHODIMP
nsHTMLButtonElement::Blur()
{
return SetElementFocus(PR_FALSE);
}
NS_IMETHODIMP
nsHTMLButtonElement::Focus()
{
return SetElementFocus(PR_TRUE);
}
NS_IMETHODIMP
nsHTMLButtonElement::Click()
{
if (mHandlingClick)
return NS_OK;
mHandlingClick = PR_TRUE;
nsCOMPtr<nsIDocument> doc;
GetDocument(*getter_AddRefs(doc));
if (doc) {
PRInt32 numShells = doc->GetNumberOfShells();
nsCOMPtr<nsIPresContext> context;
for (PRInt32 count=0; count < numShells; count++) {
nsCOMPtr<nsIPresShell> shell;
doc->GetShellAt(count, getter_AddRefs(shell));
if (shell) {
shell->GetPresContext(getter_AddRefs(context));
if (context) {
nsEventStatus status = nsEventStatus_eIgnore;
nsMouseEvent event;
event.eventStructType = NS_MOUSE_EVENT;
event.message = NS_MOUSE_LEFT_CLICK;
event.isShift = PR_FALSE;
event.isControl = PR_FALSE;
event.isAlt = PR_FALSE;
event.isMeta = PR_FALSE;
event.clickCount = 0;
event.widget = nsnull;
HandleDOMEvent(context, &event, nsnull,
NS_EVENT_FLAG_INIT, &status);
}
}
}
}
mHandlingClick = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLButtonElement::SetFocus(nsIPresContext* aPresContext)
{
NS_ENSURE_ARG_POINTER(aPresContext);
// first see if we are disabled or not. If disabled then do nothing.
nsAutoString disabled;
if (NS_CONTENT_ATTR_HAS_VALUE == GetAttribute(kNameSpaceID_None,
nsHTMLAtoms::disabled,
disabled)) {
return NS_OK;
}
nsCOMPtr<nsIEventStateManager> esm;
if (NS_OK == aPresContext->GetEventStateManager(getter_AddRefs(esm))) {
esm->SetContentState(this, NS_EVENT_STATE_FOCUS);
}
nsIFormControlFrame* formControlFrame = GetFormControlFrame(PR_FALSE);
if (formControlFrame) {
formControlFrame->SetFocus(PR_TRUE, PR_TRUE);
formControlFrame->ScrollIntoView(aPresContext);
}
return NS_OK;
}
NS_IMETHODIMP
nsHTMLButtonElement::RemoveFocus(nsIPresContext* aPresContext)
{
NS_ENSURE_ARG_POINTER(aPresContext);
// If we are disabled, we probably shouldn't have focus in the
// first place, so allow it to be removed.
nsresult rv = NS_OK;
nsIFormControlFrame* formControlFrame = GetFormControlFrame(PR_FALSE);
if (formControlFrame) {
formControlFrame->SetFocus(PR_FALSE, PR_FALSE);
}
nsCOMPtr<nsIEventStateManager> esm;
if (NS_OK == aPresContext->GetEventStateManager(getter_AddRefs(esm))) {
nsCOMPtr<nsIDocument> doc;
GetDocument(*getter_AddRefs(doc));
if (!doc)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIContent> rootContent;
doc->GetRootContent(getter_AddRefs(rootContent));
rv = esm->SetContentState(rootContent, NS_EVENT_STATE_FOCUS);
}
return rv;
}
static nsGenericHTMLElement::EnumTable kButtonTypeTable[] = {
{ "button", NS_FORM_BUTTON_BUTTON },
{ "reset", NS_FORM_BUTTON_RESET },
{ "submit", NS_FORM_BUTTON_SUBMIT },
{ 0 }
};
NS_IMETHODIMP
nsHTMLButtonElement::StringToAttribute(nsIAtom* aAttribute,
const nsAString& aValue,
nsHTMLValue& aResult)
{
if (aAttribute == nsHTMLAtoms::tabindex) {
if (ParseValue(aValue, 0, 32767, aResult, eHTMLUnit_Integer)) {
return NS_CONTENT_ATTR_HAS_VALUE;
}
}
else if (aAttribute == nsHTMLAtoms::type) {
nsGenericHTMLElement::EnumTable *table = kButtonTypeTable;
nsAutoString val(aValue);
while (nsnull != table->tag) {
if (val.EqualsIgnoreCase(table->tag)) {
aResult.SetIntValue(table->value, eHTMLUnit_Enumerated);
mType = table->value;
return NS_CONTENT_ATTR_HAS_VALUE;
}
table++;
}
}
else if (aAttribute == nsHTMLAtoms::disabled) {
aResult.SetEmptyValue();
return NS_CONTENT_ATTR_HAS_VALUE;
}
return NS_CONTENT_ATTR_NOT_THERE;
}
NS_IMETHODIMP
nsHTMLButtonElement::AttributeToString(nsIAtom* aAttribute,
const nsHTMLValue& aValue,
nsAString& aResult) const
{
if (aAttribute == nsHTMLAtoms::type) {
if (eHTMLUnit_Enumerated == aValue.GetUnit()) {
EnumValueToString(aValue, kButtonTypeTable, aResult);
return NS_CONTENT_ATTR_HAS_VALUE;
}
}
return nsGenericHTMLContainerFormElement::AttributeToString(aAttribute,
aValue, aResult);
}
NS_IMETHODIMP
nsHTMLButtonElement::HandleDOMEvent(nsIPresContext* aPresContext,
nsEvent* aEvent,
nsIDOMEvent** aDOMEvent,
PRUint32 aFlags,
nsEventStatus* aEventStatus)
{
NS_ENSURE_ARG(aPresContext);
NS_ENSURE_ARG_POINTER(aEventStatus);
// Do not process any DOM events if the element is disabled
PRBool bDisabled;
nsresult rv = GetDisabled(&bDisabled);
if (NS_FAILED(rv) || bDisabled) {
return rv;
}
nsIFormControlFrame* formControlFrame = GetFormControlFrame(PR_FALSE);
if (formControlFrame) {
nsIFrame* formFrame = nsnull;
CallQueryInterface(formControlFrame, &formFrame);
if (formFrame) {
const nsStyleUserInterface* uiStyle;
formFrame->GetStyleData(eStyleStruct_UserInterface,
(const nsStyleStruct *&)uiStyle);
if (uiStyle->mUserInput == NS_STYLE_USER_INPUT_NONE ||
uiStyle->mUserInput == NS_STYLE_USER_INPUT_DISABLED)
return NS_OK;
}
}
PRBool bInSubmitClick = mType == NS_FORM_BUTTON_SUBMIT &&
!(aFlags & NS_EVENT_FLAG_CAPTURE) &&
!(aFlags & NS_EVENT_FLAG_SYSTEM_EVENT) &&
aEvent->message == NS_MOUSE_LEFT_CLICK &&
mForm;
if (bInSubmitClick) {
// tell the form that we are about to enter a click handler.
// that means that if there are scripted submissions, the
// latest one will be deferred until after the exit point of the handler.
mForm->OnSubmitClickBegin();
}
// Try script event handlers first
nsresult ret;
ret = nsGenericHTMLContainerFormElement::HandleDOMEvent(aPresContext,
aEvent, aDOMEvent,
aFlags,
aEventStatus);
if (bInSubmitClick) {
// tell the form that we are about to exit a click handler
// so the form knows not to defer subsequent submissions
// the pending ones that were created during the handler
// will be flushed or forgoten.
mForm->OnSubmitClickEnd();
}
if (NS_SUCCEEDED(ret) &&
!(aFlags & NS_EVENT_FLAG_CAPTURE) && !(aFlags & NS_EVENT_FLAG_SYSTEM_EVENT)) {
if (nsEventStatus_eIgnore == *aEventStatus) {
switch (aEvent->message) {
case NS_KEY_PRESS:
case NS_KEY_UP:
{
// For backwards compat, trigger buttons with space or enter
// (bug 25300)
nsKeyEvent * keyEvent = (nsKeyEvent *)aEvent;
if ((keyEvent->keyCode == NS_VK_RETURN && NS_KEY_PRESS == aEvent->message) ||
keyEvent->keyCode == NS_VK_SPACE && NS_KEY_UP == aEvent->message) {
nsEventStatus status = nsEventStatus_eIgnore;
nsMouseEvent event;
event.eventStructType = NS_MOUSE_EVENT;
event.message = NS_MOUSE_LEFT_CLICK;
event.isShift = PR_FALSE;
event.isControl = PR_FALSE;
event.isAlt = PR_FALSE;
event.isMeta = PR_FALSE;
event.clickCount = 0;
event.widget = nsnull;
rv = HandleDOMEvent(aPresContext, &event, nsnull,
NS_EVENT_FLAG_INIT, &status);
}
}
break;// NS_KEY_PRESS
case NS_MOUSE_LEFT_CLICK:
{
if (mForm) {
if (mType == NS_FORM_BUTTON_SUBMIT) {
// tell the form to forget a possible pending submission.
// the reason is that the script returned true (the event was
// ignored) so if there is a stored submission, it will miss
// the name/value of the submitting element, thus we need
// to forget it and the form element will build a new one
mForm->ForgetPendingSubmission();
}
if (mType == NS_FORM_BUTTON_SUBMIT || mType == NS_FORM_BUTTON_RESET) {
nsFormEvent event;
event.eventStructType = NS_FORM_EVENT;
event.message = (mType == NS_FORM_BUTTON_RESET)
? NS_FORM_RESET : NS_FORM_SUBMIT;
event.originator = this;
nsEventStatus status = nsEventStatus_eIgnore;
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
// If |nsIPresShell::Destroy| has been called due to
// handling the event (base class HandleDOMEvent, above),
// the pres context will return a null pres shell. See
// bug 125624.
if (presShell) {
nsCOMPtr<nsIContent> form(do_QueryInterface(mForm));
presShell->HandleDOMEventWithTarget(form, &event, &status);
}
}
}
}
break;// NS_MOUSE_LEFT_CLICK
case NS_MOUSE_LEFT_BUTTON_DOWN:
{
nsIEventStateManager *stateManager;
if (NS_OK == aPresContext->GetEventStateManager(&stateManager)) {
stateManager->SetContentState(this, NS_EVENT_STATE_ACTIVE |
NS_EVENT_STATE_FOCUS);
NS_RELEASE(stateManager);
}
*aEventStatus = nsEventStatus_eConsumeNoDefault;
}
break;
// cancel all of these events for buttons
case NS_MOUSE_MIDDLE_BUTTON_DOWN:
case NS_MOUSE_MIDDLE_BUTTON_UP:
case NS_MOUSE_MIDDLE_DOUBLECLICK:
case NS_MOUSE_RIGHT_DOUBLECLICK:
case NS_MOUSE_RIGHT_BUTTON_DOWN:
case NS_MOUSE_RIGHT_BUTTON_UP:
{
nsCOMPtr<nsIDOMNSEvent> nsevent;
if (aDOMEvent) {
nsevent = do_QueryInterface(*aDOMEvent);
}
if (nsevent) {
nsevent->PreventBubble();
} else {
ret = NS_ERROR_FAILURE;
}
}
break;
case NS_MOUSE_ENTER_SYNTH:
{
nsIEventStateManager *stateManager;
if (NS_OK == aPresContext->GetEventStateManager(&stateManager)) {
stateManager->SetContentState(this, NS_EVENT_STATE_HOVER);
NS_RELEASE(stateManager);
}
*aEventStatus = nsEventStatus_eConsumeNoDefault;
}
break;
// XXX this doesn't seem to do anything yet
case NS_MOUSE_EXIT_SYNTH:
{
nsIEventStateManager *stateManager;
if (NS_OK == aPresContext->GetEventStateManager(&stateManager)) {
stateManager->SetContentState(nsnull, NS_EVENT_STATE_HOVER);
NS_RELEASE(stateManager);
}
*aEventStatus = nsEventStatus_eConsumeNoDefault;
}
break;
default:
break;
}
} else {
switch (aEvent->message) {
case NS_MOUSE_LEFT_CLICK:
if (mForm && mType == NS_FORM_BUTTON_SUBMIT) {
// tell the form to flush a possible pending submission.
// the reason is that the script returned false (the event was
// not ignored) so if there is a stored submission, it needs to
// be submitted immediatelly.
mForm->FlushPendingSubmission();
}
break;// NS_MOUSE_LEFT_CLICK
} //switch
} //if
} //if
return ret;
}
#ifdef DEBUG
NS_IMETHODIMP
nsHTMLButtonElement::SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const
{
*aResult = sizeof(*this) + BaseSizeOf(aSizer);
return NS_OK;
}
#endif
nsresult
nsHTMLButtonElement::GetDefaultValue(nsAString& aDefaultValue)
{
return GetAttr(kNameSpaceID_None, nsHTMLAtoms::value, aDefaultValue);
}
nsresult
nsHTMLButtonElement::SetDefaultValue(const nsAString& aDefaultValue)
{
return SetAttr(kNameSpaceID_None, nsHTMLAtoms::value, aDefaultValue, PR_TRUE);
}
NS_IMETHODIMP
nsHTMLButtonElement::Reset()
{
return NS_OK;
}
NS_IMETHODIMP
nsHTMLButtonElement::SubmitNamesValues(nsIFormSubmission* aFormSubmission,
nsIContent* aSubmitElement)
{
nsresult rv = NS_OK;
//
// We only submit if we were the button pressed
//
if (aSubmitElement != this) {
return NS_OK;
}
//
// Disabled elements don't submit
//
PRBool disabled;
rv = GetDisabled(&disabled);
if (NS_FAILED(rv) || disabled) {
return rv;
}
//
// Get the name (if no name, no submit)
//
nsAutoString name;
rv = GetAttr(kNameSpaceID_None, nsHTMLAtoms::name, name);
if (NS_FAILED(rv) || rv == NS_CONTENT_ATTR_NOT_THERE) {
return rv;
}
//
// Get the value
//
nsAutoString value;
rv = GetValue(value);
if (NS_FAILED(rv)) {
return rv;
}
//
// Submit
//
rv = aFormSubmission->AddNameValuePair(this, name, value);
return rv;
}