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pjs/layout/forms/nsTextControlFrame.cpp

422 строки
14 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsCOMPtr.h"
#include "nsTextControlFrame.h"
#include "nsIContent.h"
#include "prtypes.h"
#include "nsIFrame.h"
#include "nsISupports.h"
#include "nsIAtom.h"
#include "nsIPresContext.h"
#include "nsIHTMLContent.h"
#include "nsHTMLIIDs.h"
#include "nsITextWidget.h"
#include "nsITextAreaWidget.h"
#include "nsWidgetsCID.h"
#include "nsSize.h"
#include "nsString.h"
#include "nsHTMLAtoms.h"
#include "nsIStyleContext.h"
#include "nsFont.h"
#include "nsDOMEvent.h"
#include "nsIFormControl.h"
#include "nsFormFrame.h"
#include "nsIContent.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDOMHTMLTextAreaElement.h"
#include "nsCSSRendering.h"
#include "nsIDeviceContext.h"
#include "nsIFontMetrics.h"
#include "nsILookAndFeel.h"
#include "nsIComponentManager.h"
#include "nsIStatefulFrame.h"
#include "nsISupportsPrimitives.h"
#include "nsIComponentManager.h"
static NS_DEFINE_IID(kIFormControlIID, NS_IFORMCONTROL_IID);
static NS_DEFINE_IID(kTextCID, NS_TEXTFIELD_CID);
static NS_DEFINE_IID(kTextAreaCID, NS_TEXTAREA_CID);
static NS_DEFINE_IID(kITextWidgetIID, NS_ITEXTWIDGET_IID);
static NS_DEFINE_IID(kITextAreaWidgetIID, NS_ITEXTAREAWIDGET_IID);
static NS_DEFINE_IID(kIDOMHTMLTextAreaElementIID, NS_IDOMHTMLTEXTAREAELEMENT_IID);
static NS_DEFINE_IID(kIDOMHTMLInputElementIID, NS_IDOMHTMLINPUTELEMENT_IID);
static NS_DEFINE_IID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
static NS_DEFINE_IID(kILookAndFeelIID, NS_ILOOKANDFEEL_IID);
const nscoord kSuggestedNotSet = -1;
nsTextControlFrame::nsTextControlFrame()
{
mSuggestedWidth = kSuggestedNotSet;
mSuggestedHeight = kSuggestedNotSet;
}
nsTextControlFrame::~nsTextControlFrame()
{
}
nsresult
nsTextControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
} else if (aIID.Equals(NS_GET_IID(nsIStatefulFrame))) {
*aInstancePtr = (void*)(nsIStatefulFrame*) this;
NS_ADDREF_THIS();
return NS_OK;
}
return nsFormControlFrame::QueryInterface(aIID, aInstancePtr);
}
nscoord
nsTextControlFrame::GetVerticalBorderWidth(float aPixToTwip) const
{
return NSIntPixelsToTwips(4, aPixToTwip);
}
nscoord
nsTextControlFrame::GetHorizontalBorderWidth(float aPixToTwip) const
{
return GetVerticalBorderWidth(aPixToTwip);
}
// for a text area aInnerHeight is the height of one line
nscoord
nsTextControlFrame::GetVerticalInsidePadding(float aPixToTwip,
nscoord aInnerHeight) const
{
// XXX NOTE: the enums eMetric_TextShouldUseVerticalInsidePadding and eMetric_TextVerticalInsidePadding
// are ONLY needed because GTK is not using the "float" padding values and wants to only use an
// integer value for the padding instead of calculating like the other platforms.
//
// If GTK decides to start calculating the value, PLEASE remove these two enum from nsILookAndFeel and
// all the platforms nsLookAndFeel impementations so we don't have these extra values remaining in the code.
// The two enums are:
// eMetric_TextVerticalInsidePadding
// eMetric_TextShouldUseVerticalInsidePadding
//
float padTextArea;
float padTextField;
PRInt32 vertPad;
PRInt32 shouldUseVertPad;
nsILookAndFeel * lookAndFeel;
if (NS_OK == nsComponentManager::CreateInstance(kLookAndFeelCID, nsnull, kILookAndFeelIID, (void**)&lookAndFeel)) {
lookAndFeel->GetMetric(nsILookAndFeel::eMetricFloat_TextAreaVerticalInsidePadding, padTextArea);
lookAndFeel->GetMetric(nsILookAndFeel::eMetricFloat_TextFieldVerticalInsidePadding, padTextField);
// These two (below) are really only needed for GTK
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_TextVerticalInsidePadding, vertPad);
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_TextShouldUseVerticalInsidePadding, shouldUseVertPad);
NS_RELEASE(lookAndFeel);
}
if (1 == shouldUseVertPad) {
return NSIntPixelsToTwips(vertPad, aPixToTwip); // XXX this is probably wrong (for GTK)
} else {
PRInt32 type;
GetType(&type);
if (NS_FORM_TEXTAREA == type) {
return (nscoord)NSToIntRound(float(aInnerHeight) * padTextArea);
} else {
return (nscoord)NSToIntRound(float(aInnerHeight) * padTextField);
}
}
}
nscoord
nsTextControlFrame::GetHorizontalInsidePadding(nsIPresContext& aPresContext,
float aPixToTwip,
nscoord aInnerWidth,
nscoord aCharWidth) const
{
// XXX NOTE: the enum eMetric_TextShouldUseHorizontalInsideMinimumPadding
// is ONLY needed because GTK is not using the "float" padding values and wants to only use the
// "minimum" integer value for the padding instead of calculating and comparing like the other platforms.
//
// If GTK decides to start calculating and comparing the values,
// PLEASE remove these the enum from nsILookAndFeel and
// all the platforms nsLookAndFeel impementations so we don't have these extra values remaining in the code.
// The enum is:
// eMetric_TextShouldUseHorizontalInsideMinimumPadding
//
float padTextField;
float padTextArea;
PRInt32 padMinText;
PRInt32 shouldUsePadMinText;
nsILookAndFeel * lookAndFeel;
if (NS_OK == nsComponentManager::CreateInstance(kLookAndFeelCID, nsnull, kILookAndFeelIID, (void**)&lookAndFeel)) {
lookAndFeel->GetMetric(nsILookAndFeel::eMetricFloat_TextFieldHorizontalInsidePadding, padTextField);
lookAndFeel->GetMetric(nsILookAndFeel::eMetricFloat_TextAreaHorizontalInsidePadding, padTextArea);
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_TextHorizontalInsideMinimumPadding, padMinText);
// This one (below) is really only needed for GTK
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_TextShouldUseHorizontalInsideMinimumPadding, shouldUsePadMinText);
NS_RELEASE(lookAndFeel);
}
nscoord padding;
PRInt32 type;
GetType(&type);
if (NS_FORM_TEXTAREA == type) {
padding = (nscoord)(aCharWidth * padTextArea);
} else {
padding = (nscoord)(aCharWidth * padTextField);
}
nscoord min = NSIntPixelsToTwips(padMinText, aPixToTwip);
if (padding > min && (1 == shouldUsePadMinText)) {
return padding;
} else {
return min;
}
}
const nsIID&
nsTextControlFrame::GetIID()
{
PRInt32 type;
GetType(&type);
if (NS_FORM_TEXTAREA == type) {
return kITextAreaWidgetIID;
} else {
return kITextWidgetIID;
}
}
const nsIID&
nsTextControlFrame::GetCID()
{
PRInt32 type;
GetType(&type);
if (NS_FORM_TEXTAREA == type) {
return kTextAreaCID;
} else {
return kTextCID;
}
}
void
nsTextControlFrame::GetDesiredSize(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredLayoutSize)
{
nsSize widgetSize;
GetDesiredSize(aPresContext, aReflowState, aDesiredLayoutSize, widgetSize);
}
void
nsTextControlFrame::GetDesiredSize(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredLayoutSize,
nsSize& aDesiredWidgetSize)
{
nsCompatibility mode;
aPresContext->GetCompatibilityMode(&mode);
// get the css size and let the frame use or override it
nsSize styleSize;
GetStyleSize(*aPresContext, aReflowState, styleSize);
nsSize desiredSize;
nsSize minSize;
PRBool widthExplicit, heightExplicit;
PRInt32 ignore;
PRInt32 type;
GetType(&type);
if ((NS_FORM_INPUT_TEXT == type) || (NS_FORM_INPUT_PASSWORD == type)) {
PRInt32 width;
if (NS_CONTENT_ATTR_HAS_VALUE != GetSizeFromContent(&width)) {
width = GetDefaultColumnWidth();
}
//if (eCompatibility_NavQuirks == mode) {
// width += 1;
//}
nsInputDimensionSpec textSpec(nsnull, PR_FALSE, nsnull,
nsnull, width, PR_FALSE, nsnull, 1);
nsFormControlHelper::CalculateSize(aPresContext, aReflowState.rendContext, this, styleSize,
textSpec, desiredSize, minSize, widthExplicit, heightExplicit, ignore);
} else {
nsInputDimensionSpec areaSpec(nsHTMLAtoms::cols, PR_FALSE, nsnull, nsnull, GetDefaultColumnWidth(),
PR_FALSE, nsHTMLAtoms::rows, 1);
nsFormControlHelper::CalculateSize(aPresContext, aReflowState.rendContext, this, styleSize,
areaSpec, desiredSize, minSize, widthExplicit, heightExplicit, ignore);
}
float p2t;
aPresContext->GetPixelsToTwips(&p2t);
if (NS_FORM_TEXTAREA == type) {
nscoord scrollbarWidth = 0;
nscoord scrollbarHeight = 0;
float scale;
nsCOMPtr<nsIDeviceContext> dx;
aPresContext->GetDeviceContext(getter_AddRefs(dx));
if (dx) {
float sbWidth;
float sbHeight;
dx->GetCanonicalPixelScale(scale);
dx->GetScrollBarDimensions(sbWidth, sbHeight);
scrollbarWidth = PRInt32(sbWidth * scale);
scrollbarHeight = PRInt32(sbHeight * scale);
} else {
scrollbarWidth = GetScrollbarWidth(p2t);
scrollbarHeight = scrollbarWidth;
}
if (!heightExplicit) {
desiredSize.height += scrollbarHeight;
minSize.height += scrollbarHeight;
}
if (!widthExplicit) {
desiredSize.width += scrollbarWidth;
minSize.width += scrollbarWidth;
}
}
if (eCompatibility_Standard == mode) {
nsILookAndFeel * lookAndFeel;
if (NS_OK == nsComponentManager::CreateInstance(kLookAndFeelCID, nsnull, kILookAndFeelIID, (void**)&lookAndFeel)) {
PRInt32 borderSize;
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_TextFieldBorder, borderSize);
nscoord borderTwips = NSIntPixelsToTwips(borderSize, p2t);
desiredSize.width -= borderTwips*2;
desiredSize.height -= borderTwips*2;
NS_RELEASE(lookAndFeel);
}
}
aDesiredLayoutSize.width = desiredSize.width;
aDesiredLayoutSize.height = desiredSize.height;
aDesiredLayoutSize.ascent = aDesiredLayoutSize.height;
aDesiredLayoutSize.descent = 0;
if (aDesiredLayoutSize.maxElementSize) {
aDesiredLayoutSize.maxElementSize->width = minSize.width;
aDesiredLayoutSize.maxElementSize->height = minSize.height;
}
aDesiredWidgetSize.width = aDesiredLayoutSize.width;
aDesiredWidgetSize.height = aDesiredLayoutSize.height;
}
PRInt32
nsTextControlFrame::GetMaxNumValues()
{
return 1;
}
NS_IMETHODIMP
nsTextControlFrame::GetCursor(nsIPresContext& aPresContext, nsPoint& aPoint, PRInt32& aCursor)
{
/*const nsStyleColor* styleColor;
GetStyleData(eStyleStruct_Color, (const nsStyleStruct*&)styleColor);
aCursor = styleColor->mCursor;*/
//XXX This is wrong, should be through style.
aCursor = NS_STYLE_CURSOR_TEXT;
return NS_OK;
}
NS_IMETHODIMP
nsTextControlFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("TextControl", aResult);
}
//---------------------------------------------------------
NS_IMETHODIMP
nsTextControlFrame::SetSuggestedSize(nscoord aWidth, nscoord aHeight)
{
mSuggestedWidth = aWidth;
mSuggestedHeight = aHeight;
return NS_OK;
}
NS_IMETHODIMP
nsTextControlFrame::GetWrapProperty(nsString &aOutValue)
{
aOutValue = "";
nsresult result = NS_CONTENT_ATTR_NOT_THERE;
nsIHTMLContent* content = nsnull;
mContent->QueryInterface(kIHTMLContentIID, (void**) &content);
if (nsnull != content)
{
nsHTMLValue value;
result = content->GetHTMLAttribute(nsHTMLAtoms::wrap, value);
if (eHTMLUnit_String == value.GetUnit())
{
value.GetStringValue(aOutValue);
}
NS_RELEASE(content);
}
return result;
}
//----------------------------------------------------------------------
// nsIStatefulFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsTextControlFrame::GetStateType(nsIStatefulFrame::StateType* aStateType)
{
*aStateType = nsIStatefulFrame::eTextType;
return NS_OK;
}
NS_IMETHODIMP
nsTextControlFrame::SaveState(nsISupports** aState)
{
nsISupportsString* value = nsnull;
nsAutoString string;
nsresult res = GetProperty(nsHTMLAtoms::value, string);
if (NS_SUCCEEDED(res)) {
char* chars = string.ToNewCString();
if (chars) {
res = nsComponentManager::CreateInstance(NS_SUPPORTS_STRING_PROGID, nsnull,
NS_GET_IID(nsISupportsString), (void**)&value);
if (NS_SUCCEEDED(res) && value) {
value->SetData(chars);
}
nsCRT::free(chars);
} else {
res = NS_ERROR_OUT_OF_MEMORY;
}
}
*aState = (nsISupports*)value;
return res;
}
NS_IMETHODIMP
nsTextControlFrame::RestoreState(nsISupports* aState)
{
char* chars = nsnull;
nsresult res = ((nsISupportsString*)aState)->GetData(&chars);
if (NS_SUCCEEDED(res) && chars) {
nsAutoString string(chars);
res = SetProperty(nsHTMLAtoms::value, string);
nsCRT::free(chars);
}
return res;
}
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