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pjs/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 "nsStyleContext.h"
#include "nsLeafFrame.h"
#include "nsCSSRendering.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 "nsIContent.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
// For figuring out the "WRAP" property
// See GetWrapPropertyEnum for details
#define kTextControl_Wrap_Soft "SOFT"
#define kTextControl_Wrap_Hard "HARD"
#define kTextControl_Wrap_Off "OFF"
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) {
return;
}
nsIView * view;
nsPoint pnt;
aFrame->GetOffsetFromView(aPresContext, pnt, &view);
nsRect rect = aFrame->GetRect();
rect.x = pnt.x;
rect.y = pnt.y;
if (view) {
nsIViewManager* viewMgr = view->GetViewManager();
if (viewMgr) {
viewMgr->UpdateView(view, rect, NS_VMREFRESH_NO_SYNC);
}
}
}
void nsFormControlHelper::PlatformToDOMLineBreaks(nsString &aString)
{
// Windows linebreaks: Map CRLF to LF:
aString.ReplaceSubstring(NS_LITERAL_STRING("\r\n").get(), NS_LITERAL_STRING("\n").get());
// Mac linebreaks: Map any remaining CR to LF:
aString.ReplaceSubstring(NS_LITERAL_STRING("\r").get(), NS_LITERAL_STRING("\n").get());
}
PRBool nsFormControlHelper::GetBool(const nsAString& aValue)
{
return aValue.Equals(NS_STRING_TRUE);
}
void nsFormControlHelper::GetBoolString(const PRBool aValue,
nsAString& aResult)
{
if (aValue)
aResult.Assign(NS_STRING_TRUE);
else
aResult.Assign(NS_STRING_FALSE);
}
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))) {
if (font) { // Get font metrics
return aPresContext->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;
nsCOMPtr<nsIHTMLContent> content(do_QueryInterface(aContent));
if (content) {
nsHTMLValue value;
result = content->GetHTMLAttribute(nsHTMLAtoms::wrap, value);
if (eHTMLUnit_String == value.GetUnit()) {
value.GetStringValue(aOutValue);
}
}
return result;
}
nsresult
nsFormControlHelper::GetWrapPropertyEnum(nsIContent * aContent, nsHTMLTextWrap& aWrapProp)
{
// soft is the default; "physical" defaults to soft as well because all other
// browsers treat it that way and there is no real reason to maintain physical
// and virtual as separate entities if no one else does. Only hard and off
// do anything different.
aWrapProp = eHTMLTextWrap_Soft; // the default
nsAutoString wrap;
nsresult rv = GetWrapProperty(aContent, wrap);
if (rv != NS_CONTENT_ATTR_NOT_THERE) {
if (wrap.EqualsIgnoreCase(kTextControl_Wrap_Hard)) {
aWrapProp = eHTMLTextWrap_Hard;
} else if (wrap.EqualsIgnoreCase(kTextControl_Wrap_Off)) {
aWrapProp = eHTMLTextWrap_Off;
}
}
return rv;
}
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;
GetRepChars(char1, char2);
nscoord char1Width, char2Width;
aRendContext->GetWidth(char1, char1Width);
aRendContext->GetWidth(char2, char2Width);
return ((char1Width + char2Width) / 2) + 1;
}
nscoord
nsFormControlHelper::GetTextSize(nsIPresContext* aPresContext, nsIFormControlFrame* aFrame,
PRInt32 aNumChars, nsSize& aSize,
nsIRenderingContext *aRendContext)
{
nsAutoString val;
char char1, char2;
GetRepChars(char1, char2);
int i;
for (i = 0; i < aNumChars; i+=2) {
val.Append(PRUnichar(char1));
}
for (i = 1; i < aNumChars; i+=2) {
val.Append(PRUnichar(char2));
}
return GetTextSize(aPresContext, aFrame, val, aSize, aRendContext);
}
nsresult
nsFormControlHelper::GetFont(nsIFormControlFrame * aFormFrame,
nsIPresContext* aPresContext,
nsStyleContext * aStyleContext,
const nsFont*& aFont)
{
const nsStyleFont* styleFont = (const nsStyleFont*)aStyleContext->GetStyleData(eStyleStruct_Font);
aFont = &styleFont->mFont;
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)
{
NS_PRECONDITION(aResult, "Null pointer bad!");
nsCOMPtr<nsIHTMLContent> formControl(do_QueryInterface(aContent));
if (!formControl)
return NS_ERROR_FAILURE;
nsHTMLValue value;
nsresult rv = formControl->GetHTMLAttribute(nsHTMLAtoms::name, value);
if (NS_CONTENT_ATTR_HAS_VALUE == rv && eHTMLUnit_String == value.GetUnit()) {
value.GetStringValue(*aResult);
}
return rv;
}
PRInt32
nsFormControlHelper::GetType(nsIContent* aContent)
{
nsCOMPtr<nsIFormControl> formControl(do_QueryInterface(aContent));
return formControl->GetType();
}
nsresult
nsFormControlHelper::GetValueAttr(nsIContent* aContent, nsAString* aResult)
{
NS_PRECONDITION(aResult, "Null pointer bad!");
nsCOMPtr<nsIHTMLContent> formControl(do_QueryInterface(aContent));
if (!formControl)
return NS_ERROR_FAILURE;
nsHTMLValue value;
nsresult rv = formControl->GetHTMLAttribute(nsHTMLAtoms::value, value);
if (NS_CONTENT_ATTR_HAS_VALUE == rv && eHTMLUnit_String == value.GetUnit()) {
value.GetStringValue(*aResult);
}
return rv;
}
//----------------------------------------------------------------------------------
// 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;
}
nsresult
nsFormControlHelper::Reset(nsIFrame* aFrame, nsIPresContext* aPresContext)
{
nsCOMPtr<nsIFormControl> control = do_QueryInterface(aFrame->GetContent());
if (control) {
control->Reset();
return NS_OK;
}
return NS_ERROR_FAILURE;
}
void
nsFormControlHelper::StyleChangeReflow(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsHTMLReflowCommand* reflowCmd;
nsresult rv = NS_NewHTMLReflowCommand(&reflowCmd, aFrame,
eReflowType_StyleChanged);
if (NS_SUCCEEDED(rv)) {
aPresContext->PresShell()->AppendReflowCommand(reflowCmd);
}
}
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