CVS import of QPdf

1 files changed, 189 insertions, 0 deletions

diff --git a/noncore/unsupported/qpdf/xpdf/TextOutputDev.h b/noncore/unsupported/qpdf/xpdf/TextOutputDev.h
new file mode 100644
index 0000000..4c71e5e
--- a/dev/null
+++ b/noncore/unsupported/qpdf/xpdf/TextOutputDev.h
@@ -0,0 +1,189 @@
+//========================================================================
+//
+// 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