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gecko-dev/layout/forms/nsFormControlHelper.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.org 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 "nsCOMPtr.h"
#include "nsFormControlHelper.h"
#include "nsHTMLParts.h"
#include "nsIHTMLContent.h"
#include "nsIRenderingContext.h"
#include "nsIPresShell.h"
#include "nsIPresContext.h"
#include "nsIStyleContext.h"
#include "nsLeafFrame.h"
#include "nsCSSRendering.h"
#include "nsHTMLIIDs.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsCoord.h"
#include "nsWidgetsCID.h"
#include "nsViewsCID.h"
#include "nsIComponentManager.h"
#include "nsGUIEvent.h"
#include "nsIFontMetrics.h"
#include "nsIFormControl.h"
#include "nsIDeviceContext.h"
#include "nsHTMLAtoms.h"
#include "nsIButton.h" // remove this when GetCID is pure virtual
#include "nsICheckButton.h" //remove this
#include "nsITextWidget.h" //remove this
#include "nsISupports.h"
#include "nsStyleConsts.h"
#include "nsUnitConversion.h"
#include "nsStyleUtil.h"
#include "nsFormFrame.h"
#include "nsIContent.h"
#include "nsStyleUtil.h"
#include "nsINameSpaceManager.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsNetCID.h"
// Needed for Localization
#include "nsIServiceManager.h"
#include "nsIStringBundle.h"
#include "nsITextContent.h"
#include "nsISupportsArray.h"
#include "nsXPIDLString.h"
static NS_DEFINE_CID(kStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
// done I10N
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
// For figuring out the "WRAP" property
#define kTextControl_Wrap_Soft "SOFT"
#define kTextControl_Wrap_Virtual "VIRTUAL" // "virtual" is a synonym for "soft"
#define kTextControl_Wrap_Hard "HARD"
#define kTextControl_Wrap_Physical "PHYSICAL" // "physical" should be a synonym
// for "hard" but NS 4.x and IE make
// it a synonym for "soft"
#define kTextControl_Wrap_Off "OFF"
// Temporary - Test of full time Standard mode for forms (Bug 91602)
#include "nsIPref.h"
PRPackedBool nsFormControlHelper::mCompatFirstTime = PR_TRUE;
PRPackedBool nsFormControlHelper::mUseEitherMode = PR_FALSE;
MOZ_DECL_CTOR_COUNTER(nsFormControlHelper)
nsFormControlHelper::nsFormControlHelper()
{
MOZ_COUNT_CTOR(nsFormControlHelper);
}
nsFormControlHelper::~nsFormControlHelper()
{
MOZ_COUNT_DTOR(nsFormControlHelper);
}
void nsFormControlHelper::ForceDrawFrame(nsIPresContext* aPresContext, nsIFrame * aFrame)
{
if (aFrame == nsnull) {
return;
}
nsRect rect;
nsIView * view;
nsPoint pnt;
aFrame->GetOffsetFromView(aPresContext, pnt, &view);
aFrame->GetRect(rect);
rect.x = pnt.x;
rect.y = pnt.y;
if (view != nsnull) {
nsIViewManager * viewMgr;
view->GetViewManager(viewMgr);
if (viewMgr != nsnull) {
viewMgr->UpdateView(view, rect, NS_VMREFRESH_NO_SYNC);
NS_RELEASE(viewMgr);
}
}
}
void nsFormControlHelper::PlatformToDOMLineBreaks(nsString &aString)
{
// Windows linebreaks: Map CRLF to LF:
aString.ReplaceSubstring(NS_ConvertASCIItoUCS2("\r\n"), NS_ConvertASCIItoUCS2("\n"));
// Mac linebreaks: Map any remaining CR to LF:
aString.ReplaceSubstring(NS_ConvertASCIItoUCS2("\r"), NS_ConvertASCIItoUCS2("\n"));
}
PRBool nsFormControlHelper::GetBool(const nsAReadableString& aValue)
{
return aValue.Equals(NS_STRING_TRUE);
}
void nsFormControlHelper::GetBoolString(const PRBool aValue,
nsAWritableString& aResult)
{
if (aValue)
aResult.Assign(NS_STRING_TRUE);
else
aResult.Assign(NS_STRING_FALSE);
}
nsCompatibility
nsFormControlHelper::GetRepChars(nsIPresContext* aPresContext, char& char1, char& char2)
{
nsCompatibility mode;
nsFormControlHelper::GetFormCompatibilityMode(aPresContext, mode);
if (eCompatibility_Standard == mode) {
char1 = 'W';
char2 = 'w';
return eCompatibility_Standard;
} else {
char1 = 'W';
char2 = 'w';
return eCompatibility_NavQuirks;
}
}
nsresult nsFormControlHelper::GetFrameFontFM(nsIPresContext* aPresContext,
nsIFormControlFrame * aFrame,
nsIFontMetrics** aFontMet)
{
// Initialize with default font
const nsFont * font = nsnull;
// Get frame font
if (NS_SUCCEEDED(aFrame->GetFont(aPresContext, font))) {
nsCOMPtr<nsIDeviceContext> deviceContext;
aPresContext->GetDeviceContext(getter_AddRefs(deviceContext));
NS_ASSERTION(deviceContext, "Couldn't get the device context");
if (font != nsnull) { // Get font metrics
return deviceContext->GetMetricsFor(*font, *aFontMet);
}
}
return NS_ERROR_FAILURE;
}
nsresult
nsFormControlHelper::GetWrapProperty(nsIContent * aContent, nsString &aOutValue)
{
aOutValue.SetLength(0);
nsresult result = NS_CONTENT_ATTR_NOT_THERE;
nsIHTMLContent* content = nsnull;
aContent->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;
}
nsresult
nsFormControlHelper::GetWrapPropertyEnum(nsIContent * aContent, nsHTMLTextWrap& aWrapProp)
{
nsString wrap;
aWrapProp = eHTMLTextWrap_Off; // the default
nsresult result = GetWrapProperty(aContent, wrap);
if (NS_CONTENT_ATTR_NOT_THERE != result) {
nsAutoString wrapHard; wrapHard.AssignWithConversion(kTextControl_Wrap_Hard);
nsAutoString wrapPhysical; wrapPhysical.AssignWithConversion(kTextControl_Wrap_Physical);
if (wrap.EqualsIgnoreCase(wrapHard)) {
aWrapProp = eHTMLTextWrap_Hard;
return result;
}
nsAutoString wrapSoft; wrapSoft.AssignWithConversion(kTextControl_Wrap_Soft);
nsAutoString wrapVirtual; wrapVirtual.AssignWithConversion(kTextControl_Wrap_Virtual);
if (wrap.EqualsIgnoreCase(wrapSoft) ||
wrap.EqualsIgnoreCase(wrapVirtual) ||
wrap.EqualsIgnoreCase(wrapPhysical)) {
aWrapProp = eHTMLTextWrap_Soft;
return result;
}
}
return result;
}
nscoord
nsFormControlHelper::CalcNavQuirkSizing(nsIPresContext* aPresContext,
nsIRenderingContext* aRendContext,
nsIFontMetrics* aFontMet,
nsIFormControlFrame* aFrame,
nsInputDimensionSpec& aSpec,
nsSize& aSize)
{
float p2t;
float t2p;
aPresContext->GetPixelsToTwips(&p2t);
aPresContext->GetTwipsToPixels(&t2p);
nscoord ascent;
nscoord descent;
nscoord maxCharWidth;
aFontMet->GetMaxAscent(ascent);
aFontMet->GetMaxDescent(descent);
aFontMet->GetMaxAdvance(maxCharWidth);
ascent = NSToCoordRound(ascent * t2p);
descent = NSToCoordRound(descent * t2p);
maxCharWidth = NSToCoordRound(maxCharWidth * t2p);
char char1, char2;
GetRepChars(aPresContext, char1, char2);
nscoord char1Width, char2Width;
aRendContext->GetWidth(char1, char1Width);
aRendContext->GetWidth(char2, char2Width);
char1Width = NSToCoordRound(char1Width * t2p);
char2Width = NSToCoordRound(char2Width * t2p);
// Nav Quirk Calculation for TextField
PRInt32 type;
aFrame->GetType(&type);
nscoord width;
nscoord hgt;
nscoord height;
nscoord average = 0;
if ((NS_FORM_INPUT_TEXT == type) || (NS_FORM_INPUT_PASSWORD == type)) {
average = (char1Width + char2Width) / 2;
width = maxCharWidth;
hgt = ascent + descent;
height = hgt + (hgt / 2);
width += aSpec.mColDefaultSize * average;
} else if (NS_FORM_TEXTAREA == type) {
nscoord lines = 1;
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);
scrollbarWidth = NSToCoordRound(scrollbarWidth * t2p);
scrollbarHeight = NSToCoordRound(scrollbarHeight * t2p);
} else {
NS_ASSERTION(0, "Couldn't get the device context");
scrollbarWidth = 16;
scrollbarHeight = 16;
}
nsIContent * content;
aFrame->GetFormContent(content);
nsCOMPtr<nsIHTMLContent> hContent(do_QueryInterface(content));
// determine the height
nsHTMLValue rowAttr;
nsresult rowStatus = NS_CONTENT_ATTR_NOT_THERE;
if (nsnull != aSpec.mRowSizeAttr) {
rowStatus = hContent->GetHTMLAttribute(aSpec.mRowSizeAttr, rowAttr);
}
if (NS_CONTENT_ATTR_HAS_VALUE == rowStatus) { // row attr will provide height
PRInt32 rowAttrInt = ((rowAttr.GetUnit() == eHTMLUnit_Pixel)
? rowAttr.GetPixelValue() : rowAttr.GetIntValue());
lines = (rowAttrInt > 0) ? rowAttrInt : 1;
} else {
lines = aSpec.mRowDefaultSize;
}
average = (char1Width + char2Width) / 2;
width = ((aSpec.mColDefaultSize + 1) * average) + scrollbarWidth;
hgt = ascent + descent;
height = (lines + 1) * hgt;
// then if not word wrapping
nsHTMLTextWrap wrapProp;
nsFormControlHelper::GetWrapPropertyEnum(content, wrapProp);
if (wrapProp == eHTMLTextWrap_Off) {
height += scrollbarHeight;
}
NS_RELEASE(content);
} else if (NS_FORM_INPUT_BUTTON == type ||
NS_FORM_INPUT_SUBMIT == type ||
NS_FORM_INPUT_RESET == type) {
GetTextSize(aPresContext, aFrame, *aSpec.mColDefaultValue, aSize, aRendContext);
aSize.width = NSToCoordRound(aSize.width * t2p);
aSize.height = NSToCoordRound(aSize.height * t2p);
width = 3 * aSize.width / 2;
height = 3 * aSize.height / 2;
} else if (NS_FORM_INPUT_HIDDEN == type) {
width = 0;
height = 0;
} else {
width = 0;
height = 0;
}
#ifdef DEBUG_rodsXXXX
printf("********* Nav Quirks: %d,%d max:%d average:%d ascent:%d descent:%d\n",
width, height, maxCharWidth, average, ascent, descent);
#endif
aSize.width = NSIntPixelsToTwips(width, p2t);
aSize.height = NSIntPixelsToTwips(height, p2t);
average = NSIntPixelsToTwips(average, p2t);
return average;
}
nscoord
nsFormControlHelper::GetTextSize(nsIPresContext* aPresContext, nsIFormControlFrame* aFrame,
const nsString& aString, nsSize& aSize,
nsIRenderingContext *aRendContext)
{
nsCOMPtr<nsIFontMetrics> fontMet;
nsresult res = GetFrameFontFM(aPresContext, aFrame, getter_AddRefs(fontMet));
if (NS_SUCCEEDED(res) && fontMet) {
aRendContext->SetFont(fontMet);
// measure string
aRendContext->GetWidth(aString, aSize.width);
fontMet->GetHeight(aSize.height);
} else {
NS_ASSERTION(PR_FALSE, "Couldn't get Font Metrics");
aSize.width = 0;
}
char char1, char2;
nsCompatibility mode = GetRepChars(aPresContext, char1, char2);
nscoord char1Width, char2Width;
aRendContext->GetWidth(char1, char1Width);
aRendContext->GetWidth(char2, char2Width);
if (eCompatibility_Standard == mode) {
return ((char1Width + char2Width) / 2) + 1;
} else {
return (char1Width + char2Width) / 2;
}
}
nscoord
nsFormControlHelper::GetTextSize(nsIPresContext* aPresContext, nsIFormControlFrame* aFrame,
PRInt32 aNumChars, nsSize& aSize,
nsIRenderingContext *aRendContext)
{
nsAutoString val;
char char1, char2;
GetRepChars(aPresContext, char1, char2);
int i;
for (i = 0; i < aNumChars; i+=2) {
val.AppendWithConversion(char1);
}
for (i = 1; i < aNumChars; i+=2) {
val.AppendWithConversion(char2);
}
return GetTextSize(aPresContext, aFrame, val, aSize, aRendContext);
}
PRInt32
nsFormControlHelper::CalculateSize (nsIPresContext* aPresContext,
nsIRenderingContext* aRendContext,
nsIFormControlFrame* aFrame,
const nsSize& aCSSSize,
nsInputDimensionSpec& aSpec,
nsSize& aDesiredSize,
nsSize& aMinSize,
PRBool& aWidthExplicit,
PRBool& aHeightExplicit,
nscoord& aRowHeight)
{
nscoord charWidth = 0;
PRInt32 numRows = ATTR_NOTSET;
aWidthExplicit = PR_FALSE;
aHeightExplicit = PR_FALSE;
aDesiredSize.width = CSS_NOTSET;
aDesiredSize.height = CSS_NOTSET;
nsIContent* iContent = nsnull;
aFrame->GetFormContent((nsIContent*&) iContent);
if (!iContent) {
return 0;
}
nsIHTMLContent* hContent = nsnull;
nsresult result = iContent->QueryInterface(kIHTMLContentIID, (void**)&hContent);
if ((NS_OK != result) || !hContent) {
NS_RELEASE(iContent);
return 0;
}
nsAutoString valAttr;
nsresult valStatus = NS_CONTENT_ATTR_NOT_THERE;
if (nsnull != aSpec.mColValueAttr) {
valStatus = hContent->GetAttr(kNameSpaceID_HTML, aSpec.mColValueAttr, valAttr);
}
nsHTMLValue colAttr;
nsresult colStatus = NS_CONTENT_ATTR_NOT_THERE;
if (nsnull != aSpec.mColSizeAttr) {
colStatus = hContent->GetHTMLAttribute(aSpec.mColSizeAttr, colAttr);
}
float p2t;
aPresContext->GetScaledPixelsToTwips(&p2t);
#if 0
// determine if it is percentage based width, height
PRBool percentageWidth = PR_FALSE;
PRBool percentageHeight = PR_FALSE;
const nsStylePosition* pos;
nsIFrame* iFrame = nsnull;
nsresult rv = aFrame->QueryInterface(NS_GET_IID(nsIFrame), (void**)&iFrame);
if ((NS_OK == rv) && (nsnull != iFrame)) {
iFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)pos);
if (eStyleUnit_Percent == pos->mWidth.GetUnit()) {
percentageWidth = PR_TRUE;
}
if (eStyleUnit_Percent == pos->mWidth.GetUnit()) {
percentageHeight = PR_TRUE;
}
}
#endif
nsCompatibility qMode;
nsFormControlHelper::GetFormCompatibilityMode(aPresContext, qMode);
// determine the width, char height, row height
if (NS_CONTENT_ATTR_HAS_VALUE == colStatus) { // col attr will provide width
PRInt32 col = ((colAttr.GetUnit() == eHTMLUnit_Pixel) ? colAttr.GetPixelValue() : colAttr.GetIntValue());
if (aSpec.mColSizeAttrInPixels) {
// need to set charWidth and aDesiredSize.height
charWidth = GetTextSize(aPresContext, aFrame, 1, aDesiredSize, aRendContext);
col = (col <= 0) ? 15 : col; // XXX why a default of 15 pixels, why hide it
// XXX this conflicts with a default of 20 found in nsGfxTextControlFrame.
aDesiredSize.width = NSIntPixelsToTwips(col, p2t);
} else {
col = (col <= 0) ? 1 : col; // XXX why a default of 1 char, why hide it
if (eCompatibility_NavQuirks == qMode) {
nsCOMPtr<nsIFontMetrics> fontMet;
nsresult res = GetFrameFontFM(aPresContext, aFrame, getter_AddRefs(fontMet));
if (NS_SUCCEEDED(res) && fontMet) {
aRendContext->SetFont(fontMet);
aSpec.mColDefaultSize = col;
charWidth = CalcNavQuirkSizing(aPresContext, aRendContext, fontMet,
aFrame, aSpec, aDesiredSize);
} else {
charWidth = GetTextSize(aPresContext, aFrame, col, aDesiredSize, aRendContext);
}
}
}
if (eCompatibility_Standard == qMode) {
if (aSpec.mColSizeAttrInPixels) {
aWidthExplicit = PR_TRUE;
}
}
aMinSize.width = aDesiredSize.width;
} else {
// set aDesiredSize for height calculation below. CSS may override width
if (NS_CONTENT_ATTR_HAS_VALUE == valStatus) { // use width of initial value
charWidth = GetTextSize(aPresContext, aFrame, valAttr, aDesiredSize, aRendContext);
} else if (aSpec.mColDefaultValue) { // use default value
charWidth = GetTextSize(aPresContext, aFrame, *aSpec.mColDefaultValue, aDesiredSize, aRendContext);
} else if (aSpec.mColDefaultSizeInPixels) { // use default width in pixels
charWidth = GetTextSize(aPresContext, aFrame, 1, aDesiredSize, aRendContext);
aDesiredSize.width = aSpec.mColDefaultSize;
} else { // use default width in num characters
if (eCompatibility_NavQuirks == qMode) {
nsCOMPtr<nsIFontMetrics> fontMet;
nsresult res = GetFrameFontFM(aPresContext, aFrame, getter_AddRefs(fontMet));
if (NS_SUCCEEDED(res) && fontMet) {
aRendContext->SetFont(fontMet);
// this passes in a
charWidth = CalcNavQuirkSizing(aPresContext, aRendContext, fontMet,
aFrame, aSpec, aDesiredSize);
} else {
NS_ASSERTION(fontMet, "Couldn't get Font Metrics");
aDesiredSize.width = 300; // arbitrary values
aDesiredSize.width = 1500;
}
} else {
charWidth = GetTextSize(aPresContext, aFrame, aSpec.mColDefaultSize, aDesiredSize, aRendContext);
}
}
aMinSize.width = aDesiredSize.width;
if (CSS_NOTSET != aCSSSize.width) { // css provides width
NS_ASSERTION(aCSSSize.width >= 0, "form control's computed width is < 0");
if (NS_INTRINSICSIZE != aCSSSize.width) {
aDesiredSize.width = PR_MAX(aDesiredSize.width,aCSSSize.width);
aWidthExplicit = PR_TRUE;
}
}
}
aRowHeight = aDesiredSize.height;
aMinSize.height = aDesiredSize.height;
// determine the height
if (eCompatibility_Standard == qMode) {
nsHTMLValue rowAttr;
nsresult rowStatus = NS_CONTENT_ATTR_NOT_THERE;
if (nsnull != aSpec.mRowSizeAttr) {
rowStatus = hContent->GetHTMLAttribute(aSpec.mRowSizeAttr, rowAttr);
}
if (NS_CONTENT_ATTR_HAS_VALUE == rowStatus) { // row attr will provide height
PRInt32 rowAttrInt = ((rowAttr.GetUnit() == eHTMLUnit_Pixel)
? rowAttr.GetPixelValue() : rowAttr.GetIntValue());
numRows = (rowAttrInt > 0) ? rowAttrInt : 1;
aDesiredSize.height = aDesiredSize.height * numRows;
} else {
aDesiredSize.height = aDesiredSize.height * aSpec.mRowDefaultSize;
if (CSS_NOTSET != aCSSSize.height) { // css provides height
NS_ASSERTION(aCSSSize.height > 0, "form control's computed height is <= 0");
if (NS_INTRINSICSIZE != aCSSSize.height) {
aDesiredSize.height = PR_MAX(aDesiredSize.height,aCSSSize.height);
aHeightExplicit = PR_TRUE;
}
}
}
}
NS_RELEASE(hContent);
if (ATTR_NOTSET == numRows) {
numRows = (aRowHeight > 0) ? (aDesiredSize.height / aRowHeight) : 0;
}
NS_RELEASE(iContent);
return numRows;
}
// this handles all of the input types rather than having them do it.
nsresult
nsFormControlHelper::GetFont(nsIFormControlFrame * aFormFrame,
nsIPresContext* aPresContext,
nsIStyleContext * aStyleContext,
const nsFont*& aFont)
{
const nsStyleFont* styleFont = (const nsStyleFont*)aStyleContext->GetStyleData(eStyleStruct_Font);
nsWidgetRendering m;
aPresContext->GetWidgetRenderingMode(&m);
// only add in padding if we are not Gfx, excluding the text widgets
PRBool requiresWidget = PR_FALSE;
aFormFrame->RequiresWidget(requiresWidget);
PRInt32 type;
aFormFrame->GetType(&type);
if (type!=NS_FORM_INPUT_TEXT &&
type!=NS_FORM_TEXTAREA &&
type!=NS_FORM_INPUT_PASSWORD) {
if (PR_TRUE != requiresWidget && eWidgetRendering_Gfx == m) {
aFont = &styleFont->mFont;
return NS_OK;
}
}
nsCompatibility mode;
nsFormControlHelper::GetFormCompatibilityMode(aPresContext, mode);
if (eCompatibility_Standard == mode) {
aFont = &styleFont->mFont;
return NS_OK;
}
switch (type) {
case NS_FORM_INPUT_TEXT:
case NS_FORM_TEXTAREA:
case NS_FORM_INPUT_PASSWORD:
aFont = &styleFont->mFont;
break;
case NS_FORM_INPUT_BUTTON:
case NS_FORM_INPUT_SUBMIT:
case NS_FORM_INPUT_RESET:
case NS_FORM_SELECT:
NS_ASSERTION(0, "getting the font here has been predicated");
#if 0
if ((styleFont->mFlags & NS_STYLE_FONT_FACE_EXPLICIT) ||
(styleFont->mFlags & NS_STYLE_FONT_SIZE_EXPLICIT)) {
aFont = styleFont->mFixedFont;
aFont.weight = NS_FONT_WEIGHT_NORMAL; // always normal weight
aFont.size = styleFont->mFont.size; // normal font size
if (0 == (styleFont->mFlags & NS_STYLE_FONT_FACE_EXPLICIT)) {
aFont.name = "Arial"; // XXX windows specific font
}
} else {
// use arial, scaled down one HTML size
// italics, decoration & variant(?) get used
aFont = styleFont->mFont;
aFont.name = "Arial"; // XXX windows specific font
aFont.weight = NS_FONT_WEIGHT_NORMAL;
const nsFont& normal = aPresContext->GetDefaultFontDeprecated();
PRInt32 scaler;
aPresContext->GetFontScaler(&scaler);
float scaleFactor = nsStyleUtil::GetScalingFactor(scaler);
PRInt32 fontIndex = nsStyleUtil::FindNextSmallerFontSize(aFont.size, (PRInt32)normal.size, scaleFactor, aPresContext);
aFont.size = nsStyleUtil::CalcFontPointSize(fontIndex, (PRInt32)normal.size, scaleFactor, aPresContext);
}
#endif
break;
}
return NS_OK;
}
//
//-------------------------------------------------------------------------------------
// Utility methods for rendering Form Elements using GFX
//-------------------------------------------------------------------------------------
//
void
nsFormControlHelper::PaintLine(nsIRenderingContext& aRenderingContext,
nscoord aSX, nscoord aSY, nscoord aEX, nscoord aEY,
PRBool aHorz, nscoord aWidth, nscoord aOnePixel)
{
nsPoint p[5];
if (aHorz) {
aEX++;
p[0].x = nscoord(float(aSX)*aOnePixel);
p[0].y = nscoord(float(aSY)*aOnePixel);
p[1].x = nscoord(float(aEX)*aOnePixel);
p[1].y = nscoord(float(aEY)*aOnePixel);
p[2].x = nscoord(float(aEX)*aOnePixel);
p[2].y = nscoord(float(aEY+1)*aOnePixel);
p[3].x = nscoord(float(aSX)*aOnePixel);
p[3].y = nscoord(float(aSY+1)*aOnePixel);
p[4].x = nscoord(float(aSX)*aOnePixel);
p[4].y = nscoord(float(aSY)*aOnePixel);
} else {
aEY++;
p[0].x = nscoord(float(aSX)*aOnePixel);
p[0].y = nscoord(float(aSY)*aOnePixel);
p[1].x = nscoord(float(aEX)*aOnePixel);
p[1].y = nscoord(float(aEY)*aOnePixel);
p[2].x = nscoord(float(aEX+1)*aOnePixel);
p[2].y = nscoord(float(aEY)*aOnePixel);
p[3].x = nscoord(float(aSX+1)*aOnePixel);
p[3].y = nscoord(float(aSY)*aOnePixel);
p[4].x = nscoord(float(aSX)*aOnePixel);
p[4].y = nscoord(float(aSY)*aOnePixel);
}
aRenderingContext.FillPolygon(p, 5);
}
//---------------------------------------------------------------------------
void
nsFormControlHelper::SetupPoints(PRUint32 aNumberOfPoints, nscoord* aPoints, nsPoint* aPolygon, nscoord aScaleFactor, nscoord aX, nscoord aY,
nscoord aCenterX, nscoord aCenterY)
{
const nscoord offsetX = aCenterX * aScaleFactor;
const nscoord offsetY = aCenterY * aScaleFactor;
PRUint32 i = 0;
PRUint32 count = 0;
for (i = 0; i < aNumberOfPoints; i++) {
aPolygon[i].x = (aPoints[count] * aScaleFactor) + aX - offsetX;
count++;
aPolygon[i].y = (aPoints[count] * aScaleFactor) + aY - offsetY;
count++;
}
}
void
nsFormControlHelper::PaintFixedSizeCheckMark(nsIRenderingContext& aRenderingContext,
float aPixelsToTwips)
{
// Offsets to x,y location, These offsets are used to place the checkmark in the middle
// of it's 12X12 pixel box.
const PRUint32 ox = 3;
const PRUint32 oy = 3;
nscoord onePixel = NSIntPixelsToTwips(1, aPixelsToTwips);
// Draw checkmark using a series of rectangles. This builds an replica of the
// way the checkmark looks under Windows. Using a polygon does not correctly
// represent a checkmark under Windows. This is due to round-off error in the
// Twips to Pixel conversions.
PaintLine(aRenderingContext, 0 + ox, 2 + oy, 0 + ox, 4 + oy, PR_FALSE, 1, onePixel);
PaintLine(aRenderingContext, 1 + ox, 3 + oy, 1 + ox, 5 + oy, PR_FALSE, 1, onePixel);
PaintLine(aRenderingContext, 2 + ox, 4 + oy, 2 + ox, 6 + oy, PR_FALSE, 1, onePixel);
PaintLine(aRenderingContext, 3 + ox, 3 + oy, 3 + ox, 5 + oy, PR_FALSE, 1, onePixel);
PaintLine(aRenderingContext, 4 + ox, 2 + oy, 4 + ox, 4 + oy, PR_FALSE, 1, onePixel);
PaintLine(aRenderingContext, 5 + ox, 1 + oy, 5 + ox, 3 + oy, PR_FALSE, 1, onePixel);
PaintLine(aRenderingContext, 6 + ox, 0 + oy, 6 + ox, 2 + oy, PR_FALSE, 1, onePixel);
}
void
nsFormControlHelper::PaintFixedSizeCheckMarkBorder(nsIRenderingContext& aRenderingContext,
float aPixelsToTwips, const nsStyleColor& aBackgroundColor)
{
// Offsets to x,y location
PRUint32 ox = 0;
PRUint32 oy = 0;
nscoord onePixel = NSIntPixelsToTwips(1, aPixelsToTwips);
nscoord twelvePixels = NSIntPixelsToTwips(12, aPixelsToTwips);
// Draw Background
aRenderingContext.SetColor(aBackgroundColor.mColor);
nsRect rect(0, 0, twelvePixels, twelvePixels);
aRenderingContext.FillRect(rect);
// Draw Border
aRenderingContext.SetColor(NS_RGB(128, 128, 128));
PaintLine(aRenderingContext, 0 + ox, 0 + oy, 11 + ox, 0 + oy, PR_TRUE, 1, onePixel);
PaintLine(aRenderingContext, 0 + ox, 0 + oy, 0 + ox, 11 + oy, PR_FALSE, 1, onePixel);
aRenderingContext.SetColor(NS_RGB(192, 192, 192));
PaintLine(aRenderingContext, 1 + ox, 11 + oy, 11 + ox, 11 + oy, PR_TRUE, 1, onePixel);
PaintLine(aRenderingContext, 11 + ox, 1 + oy, 11 + ox, 11 + oy, PR_FALSE, 1, onePixel);
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
PaintLine(aRenderingContext, 1 + ox, 1 + oy, 10 + ox, 1 + oy, PR_TRUE, 1, onePixel);
PaintLine(aRenderingContext, 1 + ox, 1 + oy, 1 + ox, 10 + oy, PR_FALSE, 1, onePixel);
}
//Draw a checkmark in any size.
void
nsFormControlHelper::PaintCheckMark(nsIRenderingContext& aRenderingContext,
float aPixelsToTwips, const nsRect & aRect)
{
// Width and height of the fixed size checkmark in TWIPS.
const PRInt32 fixedSizeCheckmarkWidth = 165;
const PRInt32 fixedSizeCheckmarkHeight = 165;
if ((fixedSizeCheckmarkWidth == aRect.width) &&
(fixedSizeCheckmarkHeight == aRect.height)) {
// Standard size, so draw a fixed size check mark instead of a scaled check mark.
PaintFixedSizeCheckMark(aRenderingContext, aPixelsToTwips);
return;
}
const PRUint32 checkpoints = 7;
const PRUint32 checksize = 9; //This is value is determined by added 2 units to the end
//of the 7X& pixel rectangle below to provide some white space
//around the checkmark when it is rendered.
// Points come from the coordinates on a 7X7 pixels
// box with 0,0 at the lower left.
nscoord checkedPolygonDef[] = {0,2, 2,4, 6,0 , 6,2, 2,6, 0,4, 0,2 };
// Location of the center point of the checkmark
const PRUint32 centerx = 3;
const PRUint32 centery = 3;
nsPoint checkedPolygon[checkpoints];
PRUint32 defIndex = 0;
PRUint32 polyIndex = 0;
// Scale the checkmark based on the smallest dimension
PRUint32 size = aRect.width / checksize;
if (aRect.height < aRect.width) {
size = aRect.height / checksize;
}
// Center and offset each point in the polygon definition.
for (defIndex = 0; defIndex < (checkpoints * 2); defIndex++) {
checkedPolygon[polyIndex].x = nscoord((((checkedPolygonDef[defIndex]) - centerx) * (size)) + (aRect.width / 2) + aRect.x);
defIndex++;
checkedPolygon[polyIndex].y = nscoord((((checkedPolygonDef[defIndex]) - centery) * (size)) + (aRect.height / 2) + aRect.y);
polyIndex++;
}
aRenderingContext.FillPolygon(checkedPolygon, checkpoints);
}
nsresult
nsFormControlHelper::GetName(nsIContent* aContent, nsAString* aResult)
{
nsresult result = NS_FORM_NOTOK;
if (nsnull != aContent) {
nsIHTMLContent* formControl = nsnull;
result = aContent->QueryInterface(kIHTMLContentIID, (void**)&formControl);
if ((NS_OK == result) && formControl) {
nsHTMLValue value;
result = formControl->GetHTMLAttribute(nsHTMLAtoms::name, value);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
if (eHTMLUnit_String == value.GetUnit()) {
value.GetStringValue(*aResult);
}
}
NS_RELEASE(formControl);
}
}
return result;
}
nsresult
nsFormControlHelper::GetValue(nsIContent* aContent, nsAString* aResult)
{
nsresult result = NS_FORM_NOTOK;
if (nsnull != aContent) {
nsIHTMLContent* formControl = nsnull;
result = aContent->QueryInterface(kIHTMLContentIID, (void**)&formControl);
if ((NS_OK == result) && formControl) {
nsHTMLValue value;
result = formControl->GetHTMLAttribute(nsHTMLAtoms::value, value);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
if (eHTMLUnit_String == value.GetUnit()) {
value.GetStringValue(*aResult);
}
}
NS_RELEASE(formControl);
}
}
return result;
}
nsresult
nsFormControlHelper::GetInputElementValue(nsIContent* aContent, nsString* aText, PRBool aInitialValue)
{
nsresult result = NS_OK;
nsIDOMHTMLInputElement* inputElem = nsnull;
result = aContent->QueryInterface(NS_GET_IID(nsIDOMHTMLInputElement), (void**)&inputElem);
if ((NS_OK == result) && inputElem) {
if (PR_TRUE == aInitialValue) {
result = inputElem->GetDefaultValue(*aText);
}
else {
result = inputElem->GetValue(*aText);
}
NS_RELEASE(inputElem);
}
return result;
}
//----------------------------------------------------------------------------------
// Return localised string for resource string (e.g. "Submit" -> "Submit Query")
// This code is derived from nsBookmarksService::Init() and cookie_Localize()
nsresult
nsFormControlHelper::GetLocalizedString(const char * aPropFileName, const PRUnichar* aKey, nsString& oVal)
{
NS_ENSURE_ARG_POINTER(aKey);
nsresult rv;
nsCOMPtr<nsIStringBundle> bundle;
// Create a bundle for the localization
nsCOMPtr<nsIStringBundleService> stringService =
do_GetService(kStringBundleServiceCID, &rv);
if (NS_SUCCEEDED(rv) && stringService)
rv = stringService->CreateBundle(aPropFileName, getter_AddRefs(bundle));
// Determine default label from string bundle
if (NS_SUCCEEDED(rv) && bundle) {
nsXPIDLString valUni;
rv = bundle->GetStringFromName(aKey, getter_Copies(valUni));
if (NS_SUCCEEDED(rv) && valUni) {
oVal.Assign(valUni);
} else {
oVal.Truncate();
}
}
return rv;
}
// Return value of disabled attribute or PR_FALSE if none set
nsresult
nsFormControlHelper::GetDisabled(nsIContent* aContent, PRBool* oIsDisabled)
{
nsCOMPtr<nsIHTMLContent> formControl = do_QueryInterface(aContent);
nsHTMLValue value;
nsresult result = formControl->GetHTMLAttribute(nsHTMLAtoms::disabled, value);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
if (eHTMLUnit_Empty == value.GetUnit()) {
*oIsDisabled = PR_TRUE;
} else {
*oIsDisabled = PR_FALSE;
}
} else {
*oIsDisabled = PR_FALSE;
}
return NS_OK;
}
// manual submission helper method
// aPresShell - If the PresShell is null then the PresContext will
// get its own and use itstatic nsresult
// aFormFrame - The HTML Form's frame
// aFormControlFrame - The form controls frame that is calling this
// it can be null
// aDoSubmit - Submit = TRUE, Reset = FALSE
// Indicates whether to do DOM Processing of the event or to do regular frame processing
nsresult
nsFormControlHelper::DoManualSubmitOrReset(nsIPresContext* aPresContext,
nsIPresShell* aPresShell,
nsIFrame* aFormFrame,
nsIFrame* aFormControlFrame,
PRBool aDoSubmit,
PRBool aDoDOMEvent)
{
NS_ENSURE_ARG_POINTER(aPresContext);
NS_ENSURE_ARG_POINTER(aFormFrame);
nsresult result = NS_OK;
nsCOMPtr<nsIContent> formContent;
aFormFrame->GetContent(getter_AddRefs(formContent));
// Here we save a pointer to the form control content
// so we can get its frame again after the Shell has processed the event.
//
// Control's Frame may get destroyed during the processing of the event (by the Shell)
// meaning: aFormControlFrame becomes invalid, so instead of using aFormControlFrame
// we use the saved content and the shell to go back and get the frame and
// use it only if it isn't null
nsCOMPtr<nsIContent> controlContent;
if (aDoSubmit && aFormControlFrame != nsnull) {
aFormControlFrame->GetContent(getter_AddRefs(controlContent));
}
if (formContent) {
//Either use the PresShell passed in or go get it from the PresContext
nsCOMPtr<nsIPresShell> shell; // this will do our clean up
if (aPresShell == nsnull) {
result = aPresContext->GetShell(getter_AddRefs(shell));
aPresShell = shell.get(); // not AddRefing because shell will clean up
}
// With a valid PreShell handle the event
if (NS_SUCCEEDED(result) && nsnull != aPresShell) {
// Get originator for event (failure is non-fatal)
nsCOMPtr<nsIContent> formControl;
aFormControlFrame->GetContent(getter_AddRefs(formControl));
nsFormEvent event;
event.eventStructType = NS_FORM_EVENT;
event.message = aDoSubmit?NS_FORM_SUBMIT:NS_FORM_RESET;
event.originator = formControl;
nsEventStatus status = nsEventStatus_eIgnore;
if (aDoDOMEvent) {
aPresShell->HandleDOMEventWithTarget(formContent, &event, &status);
} else {
aPresShell->HandleEventWithTarget(&event, nsnull, formContent, NS_EVENT_FLAG_INIT, &status);
}
}
}
return result;
}
// Temporary - Test of full time Standard mode for forms (Bug 91602)
//
void nsFormControlHelper::GetFormCompatibilityMode(nsIPresContext* aPresContext,
nsCompatibility& aCompatMode)
{
if (mCompatFirstTime) {
nsCOMPtr<nsIPref> prefService(do_GetService(NS_PREF_CONTRACTID));
if (prefService) {
PRBool useEitherMode;
if (NS_SUCCEEDED(prefService->GetBoolPref("layout.forms.use_standard_or_quirks", &useEitherMode))) {
if (useEitherMode) {
mUseEitherMode = PR_TRUE;
}
}
}
mCompatFirstTime = PR_FALSE;
}
if (mUseEitherMode) {
aPresContext->GetCompatibilityMode(&aCompatMode);
} else {
aCompatMode = eCompatibility_Standard;
}
}
nsresult
nsFormControlHelper::Reset(nsIFrame* aFrame, nsIPresContext* aPresContext)
{
nsCOMPtr<nsIContent> controlContent;
aFrame->GetContent(getter_AddRefs(controlContent));
nsCOMPtr<nsIFormControl> control = do_QueryInterface(controlContent);
if (control) {
control->Reset();
return NS_OK;
}
return NS_ERROR_FAILURE;
}
nsresult
nsFormControlHelper::SaveContentState(nsIFrame* aFrame,
nsIPresContext* aPresContext,
nsIPresState** aState)
{
nsCOMPtr<nsIContent> controlContent;
aFrame->GetContent(getter_AddRefs(controlContent));
nsCOMPtr<nsIFormControl> control = do_QueryInterface(controlContent);
if (control) {
control->SaveState(aPresContext, aState);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
nsresult
nsFormControlHelper::RestoreContentState(nsIFrame* aFrame,
nsIPresContext* aPresContext,
nsIPresState* aState)
{
nsCOMPtr<nsIContent> controlContent;
aFrame->GetContent(getter_AddRefs(controlContent));
nsCOMPtr<nsIFormControl> control = do_QueryInterface(controlContent);
if (control) {
control->RestoreState(aPresContext, aState);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
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