/**************************************************************************** * NxWidgets/libnxwidgets/include/ctext.hxx * * Copyright (C) 2012 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #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 m_linePositions; /**< Array containing start indexes of each wrapped line */ TNxArray 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); /** * Destructor. */ virtual ~CText(void) {} /** * 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