xpdfviewer.cc

这是一个做pdf阅读器的源代码文件,是大家学习阅读器资料的很好参考

//========================================================================
//
// XPDFViewer.cc
//
// Copyright 2002-2003 Glyph & Cog, LLC
//
//========================================================================

#include <aconf.h>

#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif

#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <X11/keysym.h>
#include <X11/cursorfont.h>
#ifdef HAVE_X11_XPM_H
#include <X11/xpm.h>
#endif
#if defined(__sgi) && (XmVERSION <= 1)
#define Object XtObject
#include <Sgm/HPanedW.h>
#undef Object
#endif
#include "gmem.h"
#include "gfile.h"
#include "GString.h"
#include "GList.h"
#include "Error.h"
#include "GlobalParams.h"
#include "PDFDoc.h"
#include "Link.h"
#include "ErrorCodes.h"
#include "Outline.h"
#include "UnicodeMap.h"
#ifndef DISABLE_OUTLINE
#define Object XtObject
#include "XPDFTree.h"
#undef Object
#endif
#include "XPDFApp.h"
#include "XPDFViewer.h"
#include "PSOutputDev.h"
#include "config.h"

// these macro defns conflict with xpdf's Object class
#ifdef LESSTIF_VERSION
#undef XtDisplay
#undef XtScreen
#undef XtWindow
#undef XtParent
#undef XtIsRealized
#endif

#if XmVERSION <= 1
#define XmSET   True
#define XmUNSET False
#endif

// hack around old X includes which are missing these symbols
#ifndef XK_Page_Up
#define XK_Page_Up              0xFF55
#endif
#ifndef XK_Page_Down
#define XK_Page_Down            0xFF56
#endif
#ifndef XK_KP_Home
#define XK_KP_Home              0xFF95
#endif
#ifndef XK_KP_Left
#define XK_KP_Left              0xFF96
#endif
#ifndef XK_KP_Up
#define XK_KP_Up                0xFF97
#endif
#ifndef XK_KP_Right
#define XK_KP_Right             0xFF98
#endif
#ifndef XK_KP_Down
#define XK_KP_Down              0xFF99
#endif
#ifndef XK_KP_Prior
#define XK_KP_Prior             0xFF9A
#endif
#ifndef XK_KP_Page_Up
#define XK_KP_Page_Up           0xFF9A
#endif
#ifndef XK_KP_Next
#define XK_KP_Next              0xFF9B
#endif
#ifndef XK_KP_Page_Down
#define XK_KP_Page_Down         0xFF9B
#endif
#ifndef XK_KP_End
#define XK_KP_End               0xFF9C
#endif
#ifndef XK_KP_Begin
#define XK_KP_Begin             0xFF9D
#endif
#ifndef XK_KP_Insert
#define XK_KP_Insert            0xFF9E
#endif
#ifndef XK_KP_Delete
#define XK_KP_Delete            0xFF9F
#endif

//------------------------------------------------------------------------
// GUI includes
//------------------------------------------------------------------------

#include "xpdfIcon.xpm"
#include "leftArrow.xbm"
#include "leftArrowDis.xbm"
#include "dblLeftArrow.xbm"
#include "dblLeftArrowDis.xbm"
#include "rightArrow.xbm"
#include "rightArrowDis.xbm"
#include "dblRightArrow.xbm"
#include "dblRightArrowDis.xbm"
#include "backArrow.xbm"
#include "backArrowDis.xbm"
#include "forwardArrow.xbm"
#include "forwardArrowDis.xbm"
#include "find.xbm"
#include "findDis.xbm"
#include "print.xbm"
#include "printDis.xbm"
#include "about.xbm"
#include "about-text.h"

//------------------------------------------------------------------------

struct ZoomMenuInfo {
  char *label;
  double zoom;
};

static ZoomMenuInfo zoomMenuInfo[nZoomMenuItems] = {
  { "400%",      400 },
  { "200%",      200 },
  { "150%",      150 },
  { "125%",      125 },
  { "100%",      100 },
  { "50%",        50 },
  { "25%",        25 },
  { "12.5%",      12.5 },
  { "fit page",  zoomPage },
  { "fit width", zoomWidth }
};

#define maxZoomIdx   0
#define defZoomIdx   3
#define minZoomIdx   7
#define zoomPageIdx  8
#define zoomWidthIdx 9

//------------------------------------------------------------------------

#define cmdMaxArgs 2

XPDFViewerCmd XPDFViewer::cmdTab[] = {
  { "about",                   0, gFalse, gFalse, &XPDFViewer::cmdAbout },
  { "closeOutline",            0, gFalse, gFalse, &XPDFViewer::cmdCloseOutline },
  { "closeWindow",             0, gFalse, gFalse, &XPDFViewer::cmdCloseWindow },
  { "continuousMode",          0, gFalse, gFalse, &XPDFViewer::cmdContinuousMode },
  { "endPan",                  0, gTrue,  gTrue,  &XPDFViewer::cmdEndPan },
  { "endSelection",            0, gTrue,  gTrue,  &XPDFViewer::cmdEndSelection },
  { "find",                    0, gTrue,  gFalse, &XPDFViewer::cmdFind },
  { "findNext",                0, gTrue,  gFalse, &XPDFViewer::cmdFindNext },
  { "focusToDocWin",           0, gFalse, gFalse, &XPDFViewer::cmdFocusToDocWin },
  { "focusToPageNum",          0, gFalse, gFalse, &XPDFViewer::cmdFocusToPageNum },
  { "followLink",              0, gTrue,  gTrue,  &XPDFViewer::cmdFollowLink },
  { "followLinkInNewWin",      0, gTrue,  gTrue,  &XPDFViewer::cmdFollowLinkInNewWin },
  { "followLinkInNewWinNoSel", 0, gTrue,  gTrue,  &XPDFViewer::cmdFollowLinkInNewWinNoSel },
  { "followLinkNoSel",         0, gTrue,  gTrue,  &XPDFViewer::cmdFollowLinkNoSel },
  { "fullScreenMode",          0, gFalse, gFalse, &XPDFViewer::cmdFullScreenMode },
  { "goBackward",              0, gFalse, gFalse, &XPDFViewer::cmdGoBackward },
  { "goForward",               0, gFalse, gFalse, &XPDFViewer::cmdGoForward },
  { "gotoDest",                1, gTrue,  gFalse, &XPDFViewer::cmdGotoDest },
  { "gotoLastPage",            0, gTrue,  gFalse, &XPDFViewer::cmdGotoLastPage },
  { "gotoLastPageNoScroll",    0, gTrue,  gFalse, &XPDFViewer::cmdGotoLastPageNoScroll },
  { "gotoPage",                1, gTrue,  gFalse, &XPDFViewer::cmdGotoPage },
  { "gotoPageNoScroll",        1, gTrue,  gFalse, &XPDFViewer::cmdGotoPageNoScroll },
  { "nextPage",                0, gTrue,  gFalse, &XPDFViewer::cmdNextPage },
  { "nextPageNoScroll",        0, gTrue,  gFalse, &XPDFViewer::cmdNextPageNoScroll },
  { "open",                    0, gFalse, gFalse, &XPDFViewer::cmdOpen },
  { "openFile",                1, gFalse, gFalse, &XPDFViewer::cmdOpenFile },
  { "openFileAtDest",          2, gFalse, gFalse, &XPDFViewer::cmdOpenFileAtDest },
  { "openFileAtDestInNewWin",  2, gFalse, gFalse, &XPDFViewer::cmdOpenFileAtDestInNewWin },
  { "openFileAtPage",          2, gFalse, gFalse, &XPDFViewer::cmdOpenFileAtPage },
  { "openFileAtPageInNewWin",  2, gFalse, gFalse, &XPDFViewer::cmdOpenFileAtPageInNewWin },
  { "openFileInNewWin",        1, gFalse, gFalse, &XPDFViewer::cmdOpenFileInNewWin },
  { "openInNewWin",            0, gFalse, gFalse, &XPDFViewer::cmdOpenInNewWin },
  { "openOutline",             0, gFalse, gFalse, &XPDFViewer::cmdOpenOutline },
  { "pageDown",                0, gTrue,  gFalse, &XPDFViewer::cmdPageDown },
  { "pageUp",                  0, gTrue,  gFalse, &XPDFViewer::cmdPageUp },
  { "postPopupMenu",           0, gFalse, gTrue,  &XPDFViewer::cmdPostPopupMenu },
  { "prevPage",                0, gTrue,  gFalse, &XPDFViewer::cmdPrevPage },
  { "prevPageNoScroll",        0, gTrue,  gFalse, &XPDFViewer::cmdPrevPageNoScroll },
  { "print",                   0, gTrue,  gFalse, &XPDFViewer::cmdPrint },
  { "quit",                    0, gFalse, gFalse, &XPDFViewer::cmdQuit },
  { "raise",                   0, gFalse, gFalse, &XPDFViewer::cmdRaise },
  { "redraw",                  0, gTrue,  gFalse, &XPDFViewer::cmdRedraw },
  { "reload",                  0, gTrue,  gFalse, &XPDFViewer::cmdReload },
  { "run",                     1, gFalse, gFalse, &XPDFViewer::cmdRun },
  { "scrollDown",              1, gTrue,  gFalse, &XPDFViewer::cmdScrollDown },
  { "scrollDownNextPage",      1, gTrue,  gFalse, &XPDFViewer::cmdScrollDownNextPage },
  { "scrollLeft",              1, gTrue,  gFalse, &XPDFViewer::cmdScrollLeft },
  { "scrollOutlineDown",       1, gTrue,  gFalse, &XPDFViewer::cmdScrollOutlineDown },
  { "scrollOutlineUp",         1, gTrue,  gFalse, &XPDFViewer::cmdScrollOutlineUp },
  { "scrollRight",             1, gTrue,  gFalse, &XPDFViewer::cmdScrollRight },
  { "scrollToBottomEdge",      0, gTrue,  gFalse, &XPDFViewer::cmdScrollToBottomEdge },
  { "scrollToBottomRight",     0, gTrue,  gFalse, &XPDFViewer::cmdScrollToBottomRight },
  { "scrollToLeftEdge",        0, gTrue,  gFalse, &XPDFViewer::cmdScrollToLeftEdge },
  { "scrollToRightEdge",       0, gTrue,  gFalse, &XPDFViewer::cmdScrollToRightEdge },
  { "scrollToTopEdge",         0, gTrue,  gFalse, &XPDFViewer::cmdScrollToTopEdge },
  { "scrollToTopLeft",         0, gTrue,  gFalse, &XPDFViewer::cmdScrollToTopLeft },
  { "scrollUp",                1, gTrue,  gFalse, &XPDFViewer::cmdScrollUp },
  { "scrollUpPrevPage",        1, gTrue,  gFalse, &XPDFViewer::cmdScrollUpPrevPage },
  { "singlePageMode",          0, gFalse, gFalse, &XPDFViewer::cmdSinglePageMode },
  { "startPan",                0, gTrue,  gTrue,  &XPDFViewer::cmdStartPan },
  { "startSelection",          0, gTrue,  gTrue,  &XPDFViewer::cmdStartSelection },
  { "toggleContinuousMode",    0, gFalse, gFalse, &XPDFViewer::cmdToggleContinuousMode },
  { "toggleFullScreenMode",    0, gFalse, gFalse, &XPDFViewer::cmdToggleFullScreenMode },
  { "toggleOutline",           0, gFalse, gFalse, &XPDFViewer::cmdToggleOutline },
  { "windowMode",              0, gFalse, gFalse, &XPDFViewer::cmdWindowMode },
  { "zoomFitPage",             0, gFalse, gFalse, &XPDFViewer::cmdZoomFitPage },
  { "zoomFitWidth",            0, gFalse, gFalse, &XPDFViewer::cmdZoomFitWidth },
  { "zoomIn",                  0, gFalse, gFalse, &XPDFViewer::cmdZoomIn },
  { "zoomOut",                 0, gFalse, gFalse, &XPDFViewer::cmdZoomOut },
  { "zoomPercent",             1, gFalse, gFalse, &XPDFViewer::cmdZoomPercent },
  { "zoomToSelection",         0, gTrue,  gFalse, &XPDFViewer::cmdZoomToSelection }
};

#define nCmds (sizeof(cmdTab) / sizeof(XPDFViewerCmd))

//------------------------------------------------------------------------

XPDFViewer::XPDFViewer(XPDFApp *appA, GString *fileName,
		       int pageA, GString *destName, GBool fullScreen,
		       GString *ownerPassword, GString *userPassword) {
  LinkDest *dest;
  int pg;
  double z;

  app = appA;
  win = NULL;
  core = NULL;
  ok = gFalse;
#ifndef DISABLE_OUTLINE
  outlineLabels = NULL;
  outlineLabelsLength = outlineLabelsSize = 0;
  outlinePaneWidth = 175;
#endif

  // do Motif-specific initialization and create the window;
  // this also creates the core object
  initWindow(fullScreen);
  initAboutDialog();
  initFindDialog();
  initPrintDialog();
  openDialog = NULL;
  saveAsDialog = NULL;

  dest = NULL; // make gcc happy
  pg = pageA; // make gcc happy

  if (fileName) {
    if (loadFile(fileName, ownerPassword, userPassword)) {
      getPageAndDest(pageA, destName, &pg, &dest);
#ifndef DISABLE_OUTLINE
      if (outlineScroll != None &&
	  core->getDoc()->getOutline()->getItems() &&
	  core->getDoc()->getOutline()->getItems()->getLength() > 0) {
	XtVaSetValues(outlineScroll, XmNwidth, outlinePaneWidth, NULL);
      }
#endif
    } else {
      return;
    }
  }
  core->resizeToPage(pg);

  // map the window -- we do this after calling resizeToPage to avoid
  // an annoying on-screen resize
  mapWindow();

  // display the first page
  z = core->getZoom();
  if (dest) {
    displayDest(dest, z, core->getRotate(), gTrue);
    delete dest;
  } else {
    displayPage(pg, z, core->getRotate(), gTrue, gTrue);
  }

  ok = gTrue;
}

XPDFViewer::XPDFViewer(XPDFApp *appA, PDFDoc *doc, int pageA,
		       GString *destName, GBool fullScreen) {
  LinkDest *dest;
  int pg;
  double z;

  app = appA;
  win = NULL;
  core = NULL;
  ok = gFalse;
#ifndef DISABLE_OUTLINE
  outlineLabels = NULL;
  outlineLabelsLength = outlineLabelsSize = 0;
  outlinePaneWidth = 175;
#endif

  // do Motif-specific initialization and create the window;
  // this also creates the core object
  initWindow(fullScreen);
  initAboutDialog();
  initFindDialog();
  initPrintDialog();
  openDialog = NULL;
  saveAsDialog = NULL;

  dest = NULL; // make gcc happy
  pg = pageA; // make gcc happy

  if (doc) {
    core->loadDoc(doc);
    getPageAndDest(pageA, destName, &pg, &dest);
#ifndef DISABLE_OUTLINE
    if (outlineScroll != None &&
	core->getDoc()->getOutline()->getItems() &&
	core->getDoc()->getOutline()->getItems()->getLength() > 0) {
      XtVaSetValues(outlineScroll, XmNwidth, outlinePaneWidth, NULL);
    }
#endif
  }
  core->resizeToPage(pg);

  // map the window -- we do this after calling resizeToPage to avoid
  // an annoying on-screen resize
  mapWindow();

  // display the first page
  z = core->getZoom();
  if (dest) {
    displayDest(dest, z, core->getRotate(), gTrue);
    delete dest;
  } else {
    displayPage(pg, z, core->getRotate(), gTrue, gTrue);
  }

  ok = gTrue;
}

XPDFViewer::~XPDFViewer() {
  delete core;
  XmFontListFree(aboutBigFont);
  XmFontListFree(aboutVersionFont);
  XmFontListFree(aboutFixedFont);
  closeWindow();
#ifndef DISABLE_OUTLINE
  if (outlineLabels) {
    gfree(outlineLabels);
  }
#endif
}

void XPDFViewer::open(GString *fileName, int pageA, GString *destName) {
  LinkDest *dest;
  int pg;
  double z;

  if (!core->getDoc() || fileName->cmp(core->getDoc()->getFileName())) {
    if (!loadFile(fileName, NULL, NULL)) {
      return;
    }
  }
  getPageAndDest(pageA, destName, &pg, &dest);
  z = core->getZoom();
  if (dest) {
    displayDest(dest, z, core->getRotate(), gTrue);
    delete dest;
  } else {
    displayPage(pg, z, core->getRotate(), gTrue, gTrue);
  }
}

void XPDFViewer::clear() {
  char *title;
  XmString s;

  core->clear();

  // set up title, number-of-pages display
  title = app->getTitle() ? app->getTitle()->getCString()
                          : (char *)xpdfAppName;
  XtVaSetValues(win, XmNtitle, title, XmNiconName, title, NULL);
  s = XmStringCreateLocalized("");
  XtVaSetValues(pageNumText, XmNlabelString, s, NULL);
  XmStringFree(s);
  s = XmStringCreateLocalized(" of 0");
  XtVaSetValues(pageCountLabel, XmNlabelString, s, NULL);
  XmStringFree(s);

  // disable buttons
  XtVaSetValues(prevTenPageBtn, XmNsensitive, False, NULL);
  XtVaSetValues(prevPageBtn, XmNsensitive, False, NULL);
  XtVaSetValues(nextTenPageBtn, XmNsensitive, False, NULL);
  XtVaSetValues(nextPageBtn, XmNsensitive, False, NULL);

  // remove the old outline
#ifndef DISABLE_OUTLINE
  setupOutline();
#endif
}

//------------------------------------------------------------------------
// load / display
//------------------------------------------------------------------------

GBool XPDFViewer::loadFile(GString *fileName, GString *ownerPassword,
			   GString *userPassword) {
  return core->loadFile(fileName, ownerPassword, userPassword) == errNone;