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Mozilla/mozilla/layout/forms/nsFormControlHelper.h
rods%netscape.com b23e7af50b This checkin enables mozilla to support the printing of selection, the printing of page ranges, and 
the printing of headers and footers.
Printing of selection is implemented by the frames figuring out if they are in the selection and painting
if they or not they they don't paint. This also only allows the printing of the first page of
selections, alothough it is well documented where this is implemeted so it can be removed.
Bugs 63426, 31218, 61075 r=dcone,kmcclusk,erik,buster sr=waterson


git-svn-id: svn://10.0.0.236/trunk@85624 18797224-902f-48f8-a5cc-f745e15eee43
2001-01-27 14:09:34 +00:00

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13 KiB
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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 1.1 (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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsFormControlHelper_h___
#define nsFormControlHelper_h___
#include "nsIFormControlFrame.h"
#include "nsIFormManager.h"
#include "nsISupports.h"
#include "nsIWidget.h"
#include "nsLeafFrame.h"
#include "nsCoord.h"
#include "nsIStyleContext.h"
#include "nsIPresContext.h"
class nsIView;
//class nsIPresContext;
class nsStyleCoord;
class nsFormFrame;
//class nsIStyleContext;
#define CSS_NOTSET -1
#define ATTR_NOTSET -1
#define NS_STRING_TRUE NS_LITERAL_STRING("1")
#define NS_STRING_FALSE NS_LITERAL_STRING("0")
// for localization
#define FORM_PROPERTIES "chrome://communicator/locale/layout/HtmlForm.properties"
/**
* Enumeration of possible mouse states used to detect mouse clicks
*/
enum nsMouseState {
eMouseNone,
eMouseEnter,
eMouseExit,
eMouseDown,
eMouseUp
};
struct nsInputDimensionSpec
{
nsIAtom* mColSizeAttr; // attribute used to determine width
PRBool mColSizeAttrInPixels; // is attribute value in pixels (otherwise num chars)
nsIAtom* mColValueAttr; // attribute used to get value to determine size
// if not determined above
nsString* mColDefaultValue; // default value if not determined above
nscoord mColDefaultSize; // default width if not determined above
PRBool mColDefaultSizeInPixels; // is default width in pixels (otherswise num chars)
nsIAtom* mRowSizeAttr; // attribute used to determine height
nscoord mRowDefaultSize; // default height if not determined above
nsInputDimensionSpec(nsIAtom* aColSizeAttr, PRBool aColSizeAttrInPixels,
nsIAtom* aColValueAttr, nsString* aColDefaultValue,
nscoord aColDefaultSize, PRBool aColDefaultSizeInPixels,
nsIAtom* aRowSizeAttr, nscoord aRowDefaultSize)
: mColSizeAttr(aColSizeAttr), mColSizeAttrInPixels(aColSizeAttrInPixels),
mColValueAttr(aColValueAttr),
mColDefaultValue(aColDefaultValue), mColDefaultSize(aColDefaultSize),
mColDefaultSizeInPixels(aColDefaultSizeInPixels),
mRowSizeAttr(aRowSizeAttr), mRowDefaultSize(aRowDefaultSize)
{
}
};
/**
* nsFormControlHelper is the base class for frames of form controls. It
* provides a uniform way of creating widgets, resizing, and painting.
* @see nsLeafFrame and its base classes for more info
*/
class nsFormControlHelper
{
public:
static nscoord CalculateSize (nsIPresContext* aPresContext,
nsIRenderingContext* aRendContext,
nsIFormControlFrame* aFrame,
const nsSize& aCSSSize,
nsInputDimensionSpec& aDimensionSpec,
nsSize& aDesiredSize,
nsSize& aMinSize,
PRBool& aWidthExplicit,
PRBool& aHeightExplicit,
nscoord& aRowSize);
static nscoord GetTextSize(nsIPresContext* aContext, nsIFormControlFrame* aFrame,
const nsString& aString, nsSize& aSize,
nsIRenderingContext *aRendContext);
static nscoord GetTextSize(nsIPresContext* aContext, nsIFormControlFrame* aFrame,
PRInt32 aNumChars, nsSize& aSize,
nsIRenderingContext *aRendContext);
static nsresult GetFont(nsIFormControlFrame * aFormFrame,
nsIPresContext* aPresContext,
nsIStyleContext * aStyleContext,
const nsFont*& aFont);
// returns the an addref'ed FontMetrics for the default font for the frame
static nsresult GetFrameFontFM(nsIPresContext* aPresContext,
nsIFormControlFrame * aFrame,
nsIFontMetrics** aFontMet);
static nscoord CalcNavQuirkSizing(nsIPresContext* aPresContext,
nsIRenderingContext* aRendContext,
nsIFontMetrics* aFontMet,
nsIFormControlFrame* aFrame,
nsInputDimensionSpec& aSpec,
nsSize& aSize);
static void ForceDrawFrame(nsIPresContext* aPresContext, nsIFrame * aFrame);
// Map platform line endings (CR, CRLF, LF) to DOM line endings (LF)
static void PlatformToDOMLineBreaks(nsString &aString);
static nsresult GetValue(nsIContent* aContent, nsString* aResult);
static nsresult GetName(nsIContent* aContent, nsString* aResult);
static nsresult GetInputElementValue(nsIContent* aContent, nsString* aText, PRBool aInitialValue);
/**
* Utility to convert a string to a PRBool
* @param aValue string to convert to a PRBool
* @returns PR_TRUE if aValue = "1", PR_FALSE otherwise
*/
static PRBool GetBool(const nsAReadableString& aValue);
/**
* Utility to convert a PRBool to a string
* @param aValue Boolean value to convert to string.
* @param aResult string to hold the boolean value. It is set to "1"
* if aValue equals PR_TRUE, "0" if aValue equals PR_FALSE.
*/
static void GetBoolString(const PRBool aValue, nsAWritableString& aResult);
static nsCompatibility GetRepChars(nsIPresContext* aPresContext, char& char1, char& char2);
// wrap can be one of these three values.
typedef enum {
eHTMLTextWrap_Off = 1, // the default
eHTMLTextWrap_Hard = 2, // "hard" or "physical"
eHTMLTextWrap_Soft = 3 // "soft" or "virtual"
} nsHTMLTextWrap;
/** returns the value of the "wrap" property in aOutValue
* returns NS_CONTENT_ATTR_NOT_THERE if the property does not exist for this
*/
static nsresult GetWrapProperty(nsIContent * aContent, nsString &aOutValue);
static nsresult GetWrapPropertyEnum(nsIContent * aContent, nsHTMLTextWrap& aWrapProp);
// Localization Helper
static nsresult GetLocalizedString(const char * aPropFileName, const char* aKey, nsString& oVal);
static const char * GetHTMLPropertiesFileName() { return FORM_PROPERTIES; }
static nsresult GetDisabled(nsIContent* aContent, PRBool* oIsDisabled);
//
//-------------------------------------------------------------------------------------
// Utility methods for managing checkboxes and radiobuttons
//-------------------------------------------------------------------------------------
//
/**
* Get the state of the checked attribute.
* @param aState set to PR_TRUE if the checked attribute is set,
* PR_FALSE if the checked attribute has been removed
* @returns NS_OK or NS_CONTENT_ATTR_HAS_VALUE
*/
//nsresult GetCurrentCheckState(PRBool* aState);
/**
* Set the state of the checked attribute.
* @param aState set to PR_TRUE to set the attribute,
* PR_FALSE to unset the attribute
* @returns NS_OK or NS_CONTENT_ATTR_HAS_VALUE
*/
nsresult SetCurrentCheckState(PRBool aState);
/**
* Get the state of the defaultchecked attribute.
* @param aState set to PR_TRUE if the defaultchecked attribute is set,
* PR_FALSE if the defaultchecked attribute has been removed
* @returns NS_OK or NS_CONTENT_ATTR_HAS_VALUE
*/
nsresult GetDefaultCheckState(PRBool* aState);
//
//-------------------------------------------------------------------------------------
// Utility methods for rendering Form Elements using GFX
//-------------------------------------------------------------------------------------
//
// XXX: The following location for the paint code is TEMPORARY.
// It is being used to get printing working
// under windows. Later it will be used to GFX-render the controls to the display.
// Expect this code to repackaged and moved to a new location in the future.
/**
* Enumeration of possible mouse states used to detect mouse clicks
*/
enum nsArrowDirection {
eArrowDirection_Left,
eArrowDirection_Right,
eArrowDirection_Up,
eArrowDirection_Down
};
/**
* Scale, translate and convert an arrow of poitns from nscoord's to nsPoints's.
*
* @param aNumberOfPoints number of (x,y) pairs
* @param aPoints arrow of points to convert
* @param aScaleFactor scale factor to apply to each points translation.
* @param aX x coordinate to add to each point after scaling
* @param aY y coordinate to add to each point after scaling
* @param aCenterX x coordinate of the center point in the original array of points.
* @param aCenterY y coordiante of the center point in the original array of points.
*/
static void SetupPoints(PRUint32 aNumberOfPoints, nscoord* aPoints,
nsPoint* aPolygon, nscoord aScaleFactor, nscoord aX, nscoord aY,
nscoord aCenterX, nscoord aCenterY);
/**
* Paint a fat line. The line is drawn as a polygon with a specified width.
*
* @param aRenderingContext the rendering context
* @param aSX starting x in pixels
* @param aSY starting y in pixels
* @param aEX ending x in pixels
* @param aEY ending y in pixels
* @param aHorz PR_TRUE if aWidth is added to x coordinates to form polygon. If
* PR_FALSE then aWidth as added to the y coordinates.
* @param aOnePixel number of twips in a single pixel.
*/
static void PaintLine(nsIRenderingContext& aRenderingContext,
nscoord aSX, nscoord aSY, nscoord aEX, nscoord aEY,
PRBool aHorz, nscoord aWidth, nscoord aOnePixel);
/**
* Paint a fixed size checkmark
*
* @param aRenderingContext the rendering context
* @param aPixelsToTwips scale factor for convering pixels to twips.
*/
static void PaintFixedSizeCheckMark(nsIRenderingContext& aRenderingContext,
float aPixelsToTwips);
/**
* Paint a checkmark
*
* @param aRenderingContext the rendering context
* @param aPixelsToTwips scale factor for convering pixels to twips.
* @param aWidth width in twips
* @param aHeight height in twips
*/
static void PaintCheckMark(nsIRenderingContext& aRenderingContext,
float aPixelsToTwips, const nsRect & aRect);
/**
* Paint a fixed size checkmark border
*
* @param aRenderingContext the rendering context
* @param aPixelsToTwips scale factor for convering pixels to twips.
* @param aBackgroundColor color for background of the checkbox
*/
static void PaintFixedSizeCheckMarkBorder(nsIRenderingContext& aRenderingContext,
float aPixelsToTwips, const nsStyleColor& aBackgroundColor);
/**
* Paint a rectangular button. Includes background, string, and focus indicator
*
* @param aPresContext the presentation context
* @param aRenderingContext the rendering context
* @param aDirtyRect rectangle requiring update
* @param aRect x,y, width, and height of the button in TWIPS
* @param aShift if PR_TRUE offset button as if it were pressed
* @param aShowFocus if PR_TRUE draw focus rectangle over button
* @param aStyleContext style context used for drawing button background
* @param aLabel label for button
* @param aForFrame the frame that the scrollbar will be rendered in to
*/
static void PaintRectangularButton(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect, const nsRect& aRect,
PRBool aShift, PRBool aShowFocus, PRBool aDisabled,
PRBool aDrawOutline,
nsIStyleContext* aOutlineStyle,
nsIStyleContext* aFocusStyle,
nsIStyleContext* aStyleContext, nsString& aLabel,
nsIFrame* aForFrame);
protected:
nsFormControlHelper();
virtual ~nsFormControlHelper();
};
#endif
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