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1 files changed, 176 insertions, 0 deletions

diff --git a/pdf/xpdf/TextOutputDev.h b/pdf/xpdf/TextOutputDev.h
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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 "OutputDev.h"
+
+class GfxState;
+class GfxFont;
+class GString;
+
+//------------------------------------------------------------------------
+// TextString
+//------------------------------------------------------------------------
+
+class TextString {
+public:
+
+  // Constructor.
+  TextString(GfxState *state, GBool hexCodes1);
+
+  // Destructor.
+  ~TextString();
+
+  // Add a character to the string.
+  void addChar(GfxState *state, double x, double y,
+	       double dx, double dy,
+	       Guchar c, GBool useASCII7);
+
+private:
+
+  double xMin, xMax;		// bounding box x coordinates
+  double yMin, yMax;		// bounding box y coordinates
+  int col;			// starting column
+  GString *text;		// the text
+  double *xRight;		// right-hand x coord of each char
+  TextString *yxNext;		// next string in y-major order
+  TextString *xyNext;		// next string in x-major order
+  GBool hexCodes;		// subsetted font with hex char codes
+
+  friend class TextPage;
+};
+
+//------------------------------------------------------------------------
+// TextPage
+//------------------------------------------------------------------------
+
+class TextPage {
+public:
+
+  // Constructor.
+  TextPage(GBool useASCII71);
+
+  // Destructor.
+  ~TextPage();
+
+  // Begin a new string.
+  void beginString(GfxState *state, GString *s, GBool hex1);
+
+  // Add a character to the current string.
+  void addChar(GfxState *state, double x, double y,
+	       double dx, double dy, Guchar c);
+
+  // 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(char *s, GBool top, GBool bottom,
+		 double *xMin, double *yMin,
+		 double *xMax, double *yMax);
+
+  // Get the text which is inside the specified rectangle.
+  GString *getText(double xMin, double yMin,
+		   double xMax, double yMax);
+
+  // Dump contents of page to a file.
+  void dump(FILE *f);
+
+  // Clear the page.
+  void clear();
+
+private:
+
+  GBool useASCII7;		// use 7-bit ASCII?
+
+  TextString *curStr;		// currently active string
+
+  TextString *yxStrings;	// strings in y-major order
+  TextString *xyStrings;	// strings in x-major order
+};
+
+//------------------------------------------------------------------------
+// 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 <useASCII7> is true,
+  // text is converted to 7-bit ASCII; otherwise, text is converted to
+  // 8-bit ISO Latin-1.
+  TextOutputDev(char *fileName, GBool useASCII7);
+
+  // 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; }
+
+  //----- 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, double x, double y,
+			double dx, double dy, Guchar c);
+
+  //----- 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(char *s, GBool top, GBool bottom,
+		 double *xMin, double *yMin,
+		 double *xMax, double *yMax);
+
+private:
+
+  FILE *f;			// text file
+  GBool needClose;		// need to close the file?
+  TextPage *text;		// text for the current page
+  GBool hexCodes;		// subsetted font with hex char codes
+  GBool ok;			// set up ok?
+};
+
+#endif