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kipp
393
layout/html/forms/src/nsInputButton.cpp
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393
layout/html/forms/src/nsInputButton.cpp
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/* -*- 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 "nsInput.h"
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#include "nsInputFrame.h"
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#include "nsHTMLParts.h"
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#include "nsHTMLTagContent.h"
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#include "nsIRenderingContext.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIStyleContext.h"
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#include "nsLeafFrame.h"
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#include "nsCSSRendering.h"
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#include "nsHTMLIIDs.h"
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#include "nsIButton.h"
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#include "nsIViewManager.h"
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#include "nsISupports.h"
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#include "nsHTMLAtoms.h"
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#include "nsIButton.h"
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#include "nsIView.h"
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#include "nsViewsCID.h"
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#include "nsWidgetsCID.h"
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#include "nsIDeviceContext.h"
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#include "nsIFontCache.h"
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#include "nsIFontMetrics.h"
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#include "nsIFormManager.h"
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static NS_DEFINE_IID(kStyleFontSID, NS_STYLEFONT_SID);
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enum nsInputButtonType {
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kInputButtonButton,
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kInputButtonReset,
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kInputButtonSubmit
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};
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class nsInputButton : public nsInput {
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public:
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nsInputButton (nsIAtom* aTag, nsIFormManager* aManager,
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nsInputButtonType aType);
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virtual nsIFrame* CreateFrame(nsIPresContext* aPresContext,
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PRInt32 aIndexInParent,
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nsIFrame* aParentFrame);
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virtual void SetAttribute(nsIAtom* aAttribute, const nsString& aValue);
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virtual nsContentAttr GetAttribute(nsIAtom* aAttribute,
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nsHTMLValue& aResult) const;
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virtual void GetDefaultLabel(nsString& aLabel);
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nsInputButtonType GetButtonType() { return mType; }
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virtual PRInt32 GetMaxNumValues();
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virtual PRBool GetValues(PRInt32 aMaxNumValues, PRInt32& aNumValues, nsString* aValues);
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// Attributes
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nsString* mValue;
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nscoord mWidth;
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nscoord mHeight;
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protected:
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virtual ~nsInputButton();
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virtual void GetType(nsString& aResult) const;
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nsInputButtonType mType;
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};
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class nsInputButtonFrame : public nsInputFrame {
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public:
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nsInputButtonFrame(nsIContent* aContent,
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PRInt32 aIndexInParent,
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nsIFrame* aParentFrame);
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virtual void PreInitializeWidget(nsIPresContext* aPresContext,
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nsSize& aBounds);
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virtual void InitializeWidget(nsIView* aView);
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virtual void MouseClicked();
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virtual const nsIID GetCID();
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virtual const nsIID GetIID();
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protected:
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virtual ~nsInputButtonFrame();
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nsString mCacheLabel;
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nsFont* mCacheFont; // XXX this is bad, the lifetime of the font is not known or controlled
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};
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// nsInputButton Implementation
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nsInputButton::nsInputButton(nsIAtom* aTag, nsIFormManager* aManager,
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nsInputButtonType aType)
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: nsInput(aTag, aManager), mType(aType)
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{
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mWidth = -1;
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mHeight = -1;
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}
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nsInputButton::~nsInputButton()
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{
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if (nsnull != mValue) {
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delete mValue;
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}
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}
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void nsInputButton::SetAttribute(nsIAtom* aAttribute, const nsString& aValue)
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{
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if (aAttribute == nsHTMLAtoms::value) {
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if (nsnull == mValue) {
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mValue = new nsString(aValue);
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} else {
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mValue->SetLength(0);
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mValue->Append(aValue);
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}
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}
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else if (aAttribute == nsHTMLAtoms::width) {
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nsHTMLValue value;
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ParseValue(aValue, 0, 1000, value);
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mWidth = value.GetIntValue();
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}
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else if (aAttribute == nsHTMLAtoms::height) {
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nsHTMLValue value;
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ParseValue(aValue, 0, 1000, value);
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mHeight = value.GetIntValue();
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}
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else {
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nsInput::SetAttribute(aAttribute, aValue);
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}
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}
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nsContentAttr nsInputButton::GetAttribute(nsIAtom* aAttribute,
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nsHTMLValue& aResult) const
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{
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nsContentAttr ca = eContentAttr_NotThere;
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aResult.Reset();
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if (aAttribute == nsHTMLAtoms::value) {
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if (nsnull != mValue) {
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aResult.Set(*mValue);
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ca = eContentAttr_HasValue;
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}
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}
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else if (aAttribute == nsHTMLAtoms::width) {
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if (0 <= mWidth) {
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aResult.Set(mWidth, eHTMLUnit_Absolute);
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ca = eContentAttr_HasValue;
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}
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}
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else if (aAttribute == nsHTMLAtoms::height) {
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if (0 <= mHeight) {
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aResult.Set(mHeight, eHTMLUnit_Absolute);
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ca = eContentAttr_HasValue;
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}
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}
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else {
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ca = nsInput::GetAttribute(aAttribute, aResult);
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}
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return ca;
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}
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void nsInputButton::GetType(nsString& aResult) const
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{
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aResult.SetLength(0);
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switch (mType) {
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case kInputButtonButton:
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aResult.Append("button");
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break;
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case kInputButtonReset:
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aResult.Append("reset");
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break;
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default:
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case kInputButtonSubmit:
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aResult.Append("submit");
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break;
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}
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}
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void
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nsInputButton::GetDefaultLabel(nsString& aString)
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{
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if (kInputButtonReset == mType) {
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aString = "Reset";
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} else if (kInputButtonSubmit == mType) {
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aString = "Submit";
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} else {
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aString = "noname";
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}
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}
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nsIFrame*
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nsInputButton::CreateFrame(nsIPresContext* aPresContext,
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PRInt32 aIndexInParent,
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nsIFrame* aParentFrame)
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{
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nsIFrame* rv = new nsInputButtonFrame(this, aIndexInParent, aParentFrame);
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return rv;
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}
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PRInt32
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nsInputButton::GetMaxNumValues()
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{
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if (kInputButtonSubmit == mType) {
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return 1;
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} else {
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return 0;
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}
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}
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PRBool
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nsInputButton::GetValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
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nsString* aValues)
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{
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if (aMaxNumValues <= 0) {
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return PR_FALSE;
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}
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if (kInputButtonSubmit != mType) {
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aNumValues = 0;
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return PR_FALSE;
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}
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if (nsnull != mValue) {
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aValues[0].SetLength(0);
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aValues[0].Append(*mValue);
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aNumValues = 1;
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return PR_TRUE;
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} else {
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aNumValues = 0;
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return PR_FALSE;
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}
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}
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//----------------------------------------------------------------------
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// nsInputButtonFrame Implementation
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nsInputButtonFrame::nsInputButtonFrame(nsIContent* aContent,
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PRInt32 aIndexInParent,
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nsIFrame* aParentFrame)
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: nsInputFrame(aContent, aIndexInParent, aParentFrame)
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{
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mCacheLabel = "";
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mCacheFont = nsnull;
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}
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nsInputButtonFrame::~nsInputButtonFrame()
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{
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mCacheLabel = "";
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mCacheFont = nsnull; // should this be released? NO
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}
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void
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nsInputButtonFrame::MouseClicked()
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{
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nsInputButton* button = (nsInputButton *) GetContent();
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nsIFormManager* formMan = button->GetFormManager();
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if (nsnull != formMan) {
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if (kInputButtonReset == button->GetButtonType()) {
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formMan->OnReset();
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} else if (kInputButtonSubmit == button->GetButtonType()) {
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formMan->OnSubmit();
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}
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NS_RELEASE(formMan);
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}
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NS_RELEASE(button);
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}
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void
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nsInputButtonFrame::PreInitializeWidget(nsIPresContext* aPresContext, nsSize& aBounds)
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{
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float p2t = aPresContext->GetPixelsToTwips();
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nsInputButton* content = (nsInputButton *)GetContent(); // this must be an nsInputButton
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nsIStyleContext* styleContext = GetStyleContext(aPresContext);
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// should this be the parent
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nsStyleFont* styleFont = (nsStyleFont*)styleContext->GetData(kStyleFontSID);
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nsIDeviceContext* deviceContext = aPresContext->GetDeviceContext();
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nsIFontCache* fontCache = deviceContext->GetFontCache();
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// get the label for the button
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nsAutoString label;
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if (nsnull == content->mValue) {
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content->GetDefaultLabel(label);
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} else {
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label.Append(*content->mValue);
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}
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mCacheLabel = label; // cache the label
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// get the width and height based on the label, font, padding
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nsIFontMetrics* fontMet = fontCache->GetMetricsFor(styleFont->mFont);
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nscoord horPadding = (int) (5.0 * p2t); // need to get this from the widget
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nscoord verPadding = (int) (5.0 * p2t); // need to get this from the widget
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aBounds.width = fontMet->GetWidth(label) + (2 * horPadding);
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aBounds.height = fontMet->GetHeight() + (2 * verPadding);
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mCacheFont = &(styleFont->mFont); // cache the font XXX this is bad, the lifetime of the font is not known or controlled
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NS_RELEASE(fontMet);
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NS_RELEASE(fontCache);
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NS_RELEASE(deviceContext);
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NS_RELEASE(styleContext);
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NS_RELEASE(content);
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}
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void
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nsInputButtonFrame::InitializeWidget(nsIView *aView)
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{
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nsIButton* button;
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if (NS_OK == GetWidget(aView, (nsIWidget **)&button)) {
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if (nsnull != mCacheFont) {
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button->SetFont(*mCacheFont);
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}
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button->SetLabel(mCacheLabel);
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NS_RELEASE(button);
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}
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}
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const nsIID
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nsInputButtonFrame::GetIID()
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{
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static NS_DEFINE_IID(kButtonIID, NS_IBUTTON_IID);
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return kButtonIID;
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}
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const nsIID
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nsInputButtonFrame::GetCID()
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{
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static NS_DEFINE_IID(kButtonCID, NS_BUTTON_CID);
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return kButtonCID;
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}
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nsresult
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CreateButton(nsIHTMLContent** aInstancePtrResult,
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nsIAtom* aTag, nsIFormManager* aManager,
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nsInputButtonType aType)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIHTMLContent* it = new nsInputButton(aTag, aManager, aType);
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
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}
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nsresult
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NS_NewHTMLInputButton(nsIHTMLContent** aInstancePtrResult,
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nsIAtom* aTag, nsIFormManager* aManager)
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{
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return CreateButton(aInstancePtrResult, aTag, aManager, kInputButtonButton);
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}
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nsresult
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NS_NewHTMLInputSubmit(nsIHTMLContent** aInstancePtrResult,
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nsIAtom* aTag, nsIFormManager* aManager)
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{
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return CreateButton(aInstancePtrResult, aTag, aManager, kInputButtonSubmit);
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}
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nsresult
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NS_NewHTMLInputReset(nsIHTMLContent** aInstancePtrResult,
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nsIAtom* aTag, nsIFormManager* aManager)
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{
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return CreateButton(aInstancePtrResult, aTag, aManager, kInputButtonReset);
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}
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