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px4-firmware/NxWidgets/libnxwidgets/include/ctext.hxx

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/****************************************************************************
* NxWidgets/libnxwidgets/include/ctext.hxx
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
* me be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************
*
* Portions of this package derive from Woopsi (http://woopsi.org/) and
* portions are original efforts. It is difficult to determine at this
* point what parts are original efforts and which parts derive from Woopsi.
* However, in any event, the work of Antony Dzeryn will be acknowledged
* in most NxWidget files. Thanks Antony!
*
* Copyright (c) 2007-2011, Antony Dzeryn
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names "Woopsi", "Simian Zombie" nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_CTEXT_HXX
#define __INCLUDE_CTEXT_HXX
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <nuttx/nx/nxglib.h>
#include <nuttx/nx/nx.h>
#include "nxconfig.hxx"
#include "cnxfont.hxx"
#include "tnxarray.hxx"
#include "cnxstring.hxx"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Implementation Classes
****************************************************************************/
#if defined(__cplusplus)
namespace NXWidgets
{
/**
* This class functions as a wrapper around a char array offering
* more advanced functionality - it can wrap text, calculate its
* height in pixels, calculate the width of a row, etc.
*/
class CText : public CNxString
{
private:
/**
* Struct defining the position and length of a longest line within
* the m_linePositions array.
*/
typedef struct
{
int index;
uint8_t width;
} LongestLine;
CNxFont *m_font; /**< Font to be used for output */
TNxArray<int> m_linePositions; /**< Array containing start indexes
of each wrapped line */
TNxArray<LongestLine> m_longestLines; /**< Array containing data describing
successively longer wrapped
lines */
uint8_t m_lineSpacing; /**< Spacing between lines of text */
int32_t m_textPixelHeight; /**< Total height of the wrapped
text in pixels */
uint8_t m_textPixelWidth; /**< Total width of the wrapped text
in pixels */
nxgl_coord_t m_width; /**< Width in pixels available t
the text */
public:
/**
* Constructor.
*
* @param font The font to use for this text object.
* @param text A string that this text object should wrap around.
* @param width The pixel width at which the text should wrap.
*/
CText(CNxFont *font, const CNxString &text, nxgl_coord_t width);
/**
* Set the text in the string.
*
* @param text Char array to use as the new data for this string.
*/
virtual void setText(const CNxString &text);
/**
* Set the text in the string.
*
* @param text Char array to use as the new data for this string.
*/
virtual void setText(FAR const char *text);
/**
* Set the text in the string.
*
* @param text Character to to use as the new data for this string.
*/
virtual void setText(const nxwidget_char_t text);
/**
* Append text to the end of the string.
*
* @param text String to append.
*/
virtual void append(const CNxString &text);
/**
* Insert text at the specified character index.
*
* @param text The text to insert.
* @param index The char index to insert at.
*/
virtual void insert(const CNxString &text, const int index);
/**
* Remove all characters from the string from the start index onwards.
*
* @param startIndex The char index to start removing from.
*/
virtual void remove(const int startIndex);
/**
* Remove all characters from the string from the start index onwards.
*
* @param startIndex The char index to start removing from.
* @param count The number of chars to remove.
*/
virtual void remove(const int startIndex, const int count);
/**
* Set the vertical spacing between rows of text.
*
* @param lineSpacing The line spacing.
*/
void setLineSpacing(uint8_t lineSpacing);
/**
* Sets the pixel width of the text; text wider than
* this will automatically wrap.
*
* @param width Maximum pixel width of the text.
*/
void setWidth(nxgl_coord_t width);
/**
* Set the font to use.
*
* @param font Pointer to the new font.
*/
void setFont(CNxFont *font);
/**
* Get the number of characters in the specified line number.
*
* @param lineNumber The line number to check.
* @return The number of characters in the line.
*/
const int getLineLength(const int lineNumber) const;
/**
* Get the number of characters in the specified line number,
* ignoring any trailing blank characters.
*
* @param lineNumber The line number to check.
* @return The number of characters in the line.
*/
const int getLineTrimmedLength(const int lineNumber) const;
/**
* Get the width in pixels of the specified line number.
*
* @param lineNumber The line number to check.
* @return The pixel width of the line.
*/
const nxgl_coord_t getLinePixelLength(const int lineNumber) const;
/**
* Get the width in pixels of the specified line number,
* ignoring any trailing blank characters.
*
* @param lineNumber The line number to check.
* @return The pixel width of the line.
*/
const nxgl_coord_t getLineTrimmedPixelLength(const int lineNumber) const;
/**
* Get the total height of the text in pixels.
*
* @return The total height of the text.
*/
inline const int32_t getPixelHeight(void) const
{
return m_textPixelHeight;
}
/**
* Get the width of the longest line in pixels.
*
* @return The width of the longest line.
*/
inline const uint8_t getPixelWidth(void) const
{
return m_textPixelWidth;
}
/**
* Get the pixel spacing between each line of text.
*
* @return The line spacing.
*/
inline const uint8_t getLineSpacing(void) const
{
return m_lineSpacing;
}
/**
* Get the height in pixels of a line, given as the
* height of the font plus the line spacing.
*
* @return The height of a line.
*/
inline const uint8_t getLineHeight(void) const
{
return m_font->getHeight() + m_lineSpacing;
}
/**
* Get the total number of lines in the text.
*
* @return The line count.
*/
inline const int getLineCount(void) const
{
return m_linePositions.size() - 1;
}
/**
* Get a pointer to the CText object's font.
*
* @return Pointer to the font.
*/
CNxFont *getFont(void) const;
/**
* Removes lines of text from the start of the text buffer.
*
* @param lines Number of lines to remove
*/
void stripTopLines(const int lines);
/**
* Wrap all of the text.
*/
void wrap(void);
/**
* Wrap the text from the line containing the specified char index onwards.
*
* @param charIndex The index of the char to start wrapping from; note
* that the wrapping function will re-wrap that entire line of text.
*/
void wrap(int charIndex);
/**
* Get the index of the line of text that contains the specified index
* within the raw char array.
*
* @param index The index to locate within the wrapped lines of text.
* @return The number of the line of wrapped text that contains the
* specified index.
*/
const int getLineContainingCharIndex(const int index) const;
/**
* Gets the index within the char array that represents the start of the line of
* text indicated by the line parameter.
*
* @param line The line number to locate within the char array.
* @return The index within the char array of the start of the supplied line.
*/
const int getLineStartIndex(const int line) const
{
return m_linePositions[line];
}
};
}
#endif // __cplusplus
#endif // __INCLUDE_CTEXT_HXX
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