Initial revision

1 files changed, 296 insertions, 0 deletions

diff --git a/pdf/xpdf/XPDFCore.h b/pdf/xpdf/XPDFCore.h
new file mode 100644
index 0000000..348486f
--- /dev/null
+++ b/pdf/xpdf/XPDFCore.h
@@ -0,0 +1,296 @@
+//========================================================================
+//
+// XPDFCore.h
+//
+// Copyright 2002 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef XPDFCORE_H
+#define XPDFCORE_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#define Object XtObject
+#include <Xm/XmAll.h>
+#undef Object
+#include <aconf.h>
+#include "gtypes.h"
+#include "gfile.h" // for time_t
+
+class GString;
+class GList;
+class PDFDoc;
+class LinkAction;
+class LinkDest;
+class XPixmapOutputDev;
+
+//------------------------------------------------------------------------
+// zoom factor
+//------------------------------------------------------------------------
+
+#define minZoom    -5
+#define maxZoom     5
+#define zoomPage  100
+#define zoomWidth 101
+#define defZoom     1
+
+//------------------------------------------------------------------------
+// XPDFHistory
+//------------------------------------------------------------------------
+
+struct XPDFHistory {
+  GString *fileName;
+  int page;
+};
+
+#define xpdfHistorySize 50
+
+//------------------------------------------------------------------------
+// XPDFRegion
+//------------------------------------------------------------------------
+
+struct XPDFRegion {
+  int page;
+  double xMin, yMin, xMax, yMax;
+  Gulong color;
+  Gulong selectColor;
+};
+
+//------------------------------------------------------------------------
+// callbacks
+//------------------------------------------------------------------------
+
+typedef void (*XPDFUpdateCbk)(void *data, GString *fileName,
+				int pageNum, int numPages, char *linkLabel);
+
+typedef void (*XPDFActionCbk)(void *data, char *action);
+
+typedef void (*XPDFKeyPressCbk)(void *data, char *s, KeySym key,
+				Guint modifiers);
+
+typedef void (*XPDFMouseCbk)(void *data, XEvent *event);
+
+typedef GString *(*XPDFReqPasswordCbk)(void *data, GBool again);
+
+//------------------------------------------------------------------------
+// XPDFCore
+//------------------------------------------------------------------------
+
+class XPDFCore {
+public:
+
+  // Create viewer core inside <parentWidgetA>.
+  XPDFCore(Widget shellA, Widget parentWidgetA,
+	   Gulong paperColorA, GBool fullScreenA, GBool reverseVideo,
+	   GBool installCmap, int rgbCubeSize);
+
+  ~XPDFCore();
+
+  //----- loadFile / displayPage / displayDest
+
+  // Load a new file.  Returns pdfOk or error code.
+  int loadFile(GString *fileName, GString *ownerPassword = NULL,
+	       GString *userPassword = NULL);
+
+  // Resize the window to fit page <pg> of the current document.
+  void resizeToPage(int pg);
+
+  // Clear out the current document, if any.
+  void clear();
+
+  // Display (or redisplay) the specified page.  If <scrollToTop> is
+  // set, the window is vertically scrolled to the top; otherwise, no
+  // scrolling is done.  If <addToHist> is set, this page change is
+  // added to the history list.
+  void displayPage(int pageA, int zoomA, int rotateA,
+		   GBool scrollToTop, GBool addToHist);
+
+  // Display a link destination.
+  void displayDest(LinkDest *dest, int zoomA, int rotateA,
+		   GBool addToHist);
+
+  //----- page/position changes
+
+  void gotoNextPage(int inc, GBool top);
+  void gotoPrevPage(int dec, GBool top, GBool bottom);
+  void goForward();
+  void goBackward();
+  void scrollLeft(int nCols = 1);
+  void scrollRight(int nCols = 1);
+  void scrollUp(int nLines = 1);
+  void scrollDown(int nLines = 1);
+  void scrollPageUp();
+  void scrollPageDown();
+  void scrollTo(int x, int y);
+
+  //----- selection
+
+  void setSelection(int newXMin, int newYMin, int newXMax, int newYMax);
+  void moveSelection(int mx, int my);
+  void copySelection();
+  GBool getSelection(int *xMin, int *yMin, int *xMax, int *yMax);
+  GString *extractText(int xMin, int yMin, int xMax, int yMax);
+  GString *extractText(int pageNum, int xMin, int yMin, int xMax, int yMax);
+
+  //----- hyperlinks
+
+  void doAction(LinkAction *action);
+
+
+  //----- find
+
+  void find(char *s);
+
+  //----- simple modal dialogs
+
+  GBool doQuestionDialog(char *title, GString *msg);
+  void doInfoDialog(char *title, GString *msg);
+  void doErrorDialog(char *title, GString *msg);
+
+  //----- misc access
+
+  Widget getWidget() { return scrolledWin; }
+  Widget getDrawAreaWidget() { return drawArea; }
+  PDFDoc *getDoc() { return doc; }
+  XPixmapOutputDev *getOutputDev() { return out; }
+  int getPageNum() { return page; }
+  int getZoom() { return zoom; }
+  double getZoomDPI() { return dpi; }
+  int getRotate() { return rotate; }
+  GBool canGoBack() { return historyBLen > 1; }
+  GBool canGoForward() { return historyFLen > 0; }
+  int getScrollX() { return scrollX; }
+  int getScrollY() { return scrollY; }
+  int getDrawAreaWidth() { return drawAreaWidth; }
+  int getDrawAreaHeight() { return drawAreaHeight; }
+  void setBusyCursor(GBool busy);
+  void takeFocus();
+  void enableHyperlinks(GBool on) { hyperlinksEnabled = on; }
+  void enableSelect(GBool on) { selectEnabled = on; }
+  void setUpdateCbk(XPDFUpdateCbk cbk, void *data)
+    { updateCbk = cbk; updateCbkData = data; }
+  void setActionCbk(XPDFActionCbk cbk, void *data)
+    { actionCbk = cbk; actionCbkData = data; }
+  void setKeyPressCbk(XPDFKeyPressCbk cbk, void *data)
+    { keyPressCbk = cbk; keyPressCbkData = data; }
+  void setMouseCbk(XPDFMouseCbk cbk, void *data)
+    { mouseCbk = cbk; mouseCbkData = data; }
+  void setReqPasswordCbk(XPDFReqPasswordCbk cbk, void *data)
+    { reqPasswordCbk = cbk; reqPasswordCbkData = data; }
+
+private:
+
+  //----- hyperlinks
+  void doLink(int mx, int my);
+  void runCommand(GString *cmdFmt, GString *arg);
+
+  //----- selection
+  static Boolean convertSelectionCbk(Widget widget, Atom *selection,
+				     Atom *target, Atom *type,
+				     XtPointer *value, unsigned long *length,
+				     int *format);
+
+
+  //----- GUI code
+  void initWindow();
+  static void hScrollChangeCbk(Widget widget, XtPointer ptr,
+			       XtPointer callData);
+  static void hScrollDragCbk(Widget widget, XtPointer ptr,
+			     XtPointer callData);
+  static void vScrollChangeCbk(Widget widget, XtPointer ptr,
+			       XtPointer callData);
+  static void vScrollDragCbk(Widget widget, XtPointer ptr,
+			     XtPointer callData);
+  static void resizeCbk(Widget widget, XtPointer ptr, XtPointer callData);
+  static void redrawCbk(Widget widget, XtPointer ptr, XtPointer callData);
+  static void outputDevRedrawCbk(void *data);
+  static void inputCbk(Widget widget, XtPointer ptr, XtPointer callData);
+  void keyPress(char *s, KeySym key, Guint modifiers);
+  void redrawRectangle(int x, int y, int w, int h);
+  void updateScrollBars();
+  void setCursor(Cursor cursor);
+  GBool doDialog(int type, GBool hasCancel,
+		 char *title, GString *msg);
+  static void dialogOkCbk(Widget widget, XtPointer ptr,
+			  XtPointer callData);
+  static void dialogCancelCbk(Widget widget, XtPointer ptr,
+			      XtPointer callData);
+
+  Gulong paperColor;
+  GBool fullScreen;
+
+  Display *display;
+  int screenNum;
+  Visual *visual;
+  Colormap colormap;
+  Widget shell;			// top-level shell containing the widget
+  Widget parentWidget;		// parent widget (not created by XPDFCore)
+  Widget scrolledWin;
+  Widget hScrollBar;
+  Widget vScrollBar;
+  Widget drawAreaFrame;
+  Widget drawArea;
+  Cursor busyCursor, linkCursor, selectCursor;
+  Cursor currentCursor;
+  GC drawAreaGC;		// GC for blitting into drawArea
+  GC selectGC;
+  GC highlightGC;
+
+  int drawAreaWidth, drawAreaHeight;
+  int scrollX, scrollY;		// current upper-left corner
+
+  int selectXMin, selectYMin,	// coordinates of current selection:
+      selectXMax, selectYMax;	//   (xMin==xMax || yMin==yMax) means there
+				//   is no selection
+  GBool dragging;		// set while selection is being dragged
+  GBool lastDragLeft;		// last dragged selection edge was left/right
+  GBool lastDragTop;		// last dragged selection edge was top/bottom
+  static GString *currentSelection;  // selected text
+  static XPDFCore *currentSelectionOwner;
+
+  GBool panning;
+  int panMX, panMY;
+
+  XPDFHistory			// page history queue
+    history[xpdfHistorySize];
+  int historyCur;               // currently displayed page
+  int historyBLen;              // number of valid entries backward from
+                                //   current entry
+  int historyFLen;              // number of valid entries forward from
+                                //   current entry
+
+  PDFDoc *doc;			// current PDF file
+  int page;			// current page number
+  int zoom;			// current zoom level
+  double dpi;			// current zoom level, in DPI
+  int rotate;			// current page rotation
+  time_t modTime;		// last modification time of PDF file
+
+  LinkAction *linkAction;	// mouse cursor is over this link
+
+
+  XPDFUpdateCbk updateCbk;
+  void *updateCbkData;
+  XPDFActionCbk actionCbk;
+  void *actionCbkData;
+  XPDFKeyPressCbk keyPressCbk;
+  void *keyPressCbkData;
+  XPDFMouseCbk mouseCbk;
+  void *mouseCbkData;
+  XPDFReqPasswordCbk reqPasswordCbk;
+  void *reqPasswordCbkData;
+
+  GBool hyperlinksEnabled;
+  GBool selectEnabled;
+
+  XPixmapOutputDev *out;
+
+  int dialogDone;
+};
+
+#endif