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//========================================================================
//
// TextOutputDev.h
//
// Copyright 1997 Derek B. Noonburg
//
//========================================================================
#ifndef TEXTOUTPUTDEV_H
#define TEXTOUTPUTDEV_H
#ifdef __GNUC__
#pragma interface
#endif
#include <stdio.h>
#include "gtypes.h"
#include "GfxFont.h"
#include "OutputDev.h"
class GfxState;
class GString;
//------------------------------------------------------------------------
// TextString
//------------------------------------------------------------------------
class TextString {
public:
// Constructor.
TextString(GfxState *state, fouble fontSize);
// Destructor.
~TextString();
// Add a character to the string.
void addChar(GfxState *state, fouble x, fouble y,
fouble dx, fouble dy, Unicode u);
private:
fouble xMin, xMax; // bounding box x coordinates
fouble yMin, yMax; // bounding box y coordinates
int col; // starting column
Unicode *text; // the text
fouble *xRight; // right-hand x coord of each char
int len; // length of text and xRight
int size; // size of text and xRight arrays
TextString *yxNext; // next string in y-major order
TextString *xyNext; // next string in x-major order
friend class TextPage;
};
//------------------------------------------------------------------------
// TextPage
//------------------------------------------------------------------------
class TextPage {
public:
// Constructor.
TextPage(GBool rawOrderA);
// Destructor.
~TextPage();
// Update the current font.
void updateFont(GfxState *state);
// Begin a new string.
void beginString(GfxState *state);
// Add a character to the current string.
void addChar(GfxState *state, fouble x, fouble y,
fouble dx, fouble dy, Unicode *u, int uLen);
// End the current string, sorting it into the list of strings.
void endString();
// Coalesce strings that look like parts of the same line.
void coalesce();
// Find a string. If <top> is true, starts looking at top of page;
// otherwise starts looking at <xMin>,<yMin>. If <bottom> is true,
// stops looking at bottom of page; otherwise stops looking at
// <xMax>,<yMax>. If found, sets the text bounding rectange and
// returns true; otherwise returns false.
GBool findText(Unicode *s, int len,
GBool top, GBool bottom,
fouble *xMin, fouble *yMin,
fouble *xMax, fouble *yMax);
// Get the text which is inside the specified rectangle.
GString *getText(fouble xMin, fouble yMin,
fouble xMax, fouble yMax);
// Dump contents of page to a file.
void dump(FILE *f);
// Clear the page.
void clear();
private:
GBool rawOrder; // keep strings in content stream order
TextString *curStr; // currently active string
fouble fontSize; // current font size
TextString *yxStrings; // strings in y-major order
TextString *xyStrings; // strings in x-major order
TextString *yxCur1, *yxCur2; // cursors for yxStrings list
int nest; // current nesting level (for Type 3 fonts)
};
//------------------------------------------------------------------------
// TextOutputDev
//------------------------------------------------------------------------
class TextOutputDev: public OutputDev {
public:
// Open a text output file. If <fileName> is NULL, no file is
// written (this is useful, e.g., for searching text). If
// <rawOrder> is true, the text is kept in content stream order.
TextOutputDev(char *fileName, GBool rawOrderA, GBool append);
// Destructor.
virtual ~TextOutputDev();
// Check if file was successfully created.
virtual GBool isOk() { return ok; }
//---- get info about output device
// Does this device use upside-down coordinates?
// (Upside-down means (0,0) is the top left corner of the page.)
virtual GBool upsideDown() { return gTrue; }
// Does this device use drawChar() or drawString()?
virtual GBool useDrawChar() { return gTrue; }
// Does this device need non-text content?
virtual GBool needNonText() { return gFalse; }
//----- initialization and control
// Start a page.
virtual void startPage(int pageNum, GfxState *state);
// End a page.
virtual void endPage();
//----- update text state
virtual void updateFont(GfxState *state);
//----- text drawing
virtual void beginString(GfxState *state, GString *s);
virtual void endString(GfxState *state);
virtual void drawChar(GfxState *state, fouble x, fouble y,
fouble dx, fouble dy,
fouble originX, fouble originY,
CharCode c, Unicode *u, int uLen);
//----- special access
// Find a string. If <top> is true, starts looking at top of page;
// otherwise starts looking at <xMin>,<yMin>. If <bottom> is true,
// stops looking at bottom of page; otherwise stops looking at
// <xMax>,<yMax>. If found, sets the text bounding rectange and
// returns true; otherwise returns false.
GBool findText(Unicode *s, int len,
GBool top, GBool bottom,
fouble *xMin, fouble *yMin,
fouble *xMax, fouble *yMax);
private:
FILE *f; // text file
GBool needClose; // need to close the file?
TextPage *text; // text for the current page
GBool rawOrder; // keep text in content stream order
GBool ok; // set up ok?
};
#endif
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