Synched with Xpdf 0.92

this adds "decryption" support
testing this code after six weeks immediately gives me segfaults (image drawing) :-O
must have fixed that later without knowing :-O

1 files changed, 129 insertions, 0 deletions

diff --git a/pdf/xpdf/FormWidget.cc b/pdf/xpdf/FormWidget.cc
new file mode 100644
index 0000000..76428d0
--- /dev/null
+++ b/pdf/xpdf/FormWidget.cc
@@ -0,0 +1,129 @@
+//========================================================================
+//
+// FormWidget.cc
+//
+// Copyright 2000 Derek B. Noonburg
+//
+//========================================================================
+
+#ifdef __GNUC__
+#pragma implementation
+#endif
+
+#include "gmem.h"
+#include "Object.h"
+#include "Gfx.h"
+#include "FormWidget.h"
+
+//------------------------------------------------------------------------
+// FormWidget
+//------------------------------------------------------------------------
+
+FormWidget::FormWidget(Dict *dict) {
+  Object obj1, obj2;
+  double t;
+
+  ok = gFalse;
+
+  if (dict->lookup("AP", &obj1)->isDict()) {
+    obj1.dictLookupNF("N", &obj2);
+    //~ this doesn't handle appearances with multiple states --
+    //~ need to look at AS key to get state and then get the
+    //~ corresponding entry from the N dict
+    if (obj2.isRef()) {
+      obj2.copy(&appearance);
+      ok = gTrue;
+    }
+    obj2.free();
+  }
+  obj1.free();
+
+  if (dict->lookup("Rect", &obj1)->isArray() &&
+      obj1.arrayGetLength() == 4) {
+    //~ should check object types here
+    obj1.arrayGet(0, &obj2);
+    xMin = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(1, &obj2);
+    yMin = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(2, &obj2);
+    xMax = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(3, &obj2);
+    yMax = obj2.getNum();
+    obj2.free();
+    if (xMin > xMax) {
+      t = xMin; xMin = xMax; xMax = t;
+    }
+    if (yMin > yMax) {
+      t = yMin; yMin = yMax; yMax = t;
+    }
+  } else {
+    //~ this should return an error
+    xMin = yMin = 0;
+    xMax = yMax = 1;
+  }
+  obj1.free();
+}
+
+FormWidget::~FormWidget() {
+  appearance.free();
+}
+
+void FormWidget::draw(Gfx *gfx) {
+  Object obj;
+
+  if (appearance.fetch(&obj)->isStream()) {
+    gfx->doWidgetForm(&obj, xMin, yMin, xMax, yMax);
+  }
+  obj.free();
+}
+
+//------------------------------------------------------------------------
+// FormWidgets
+//------------------------------------------------------------------------
+
+FormWidgets::FormWidgets(Object *annots) {
+  FormWidget *widget;
+  Object obj1, obj2;
+  int size;
+  int i;
+
+  widgets = NULL;
+  size = 0;
+  nWidgets = 0;
+
+  if (annots->isArray()) {
+    for (i = 0; i < annots->arrayGetLength(); ++i) {
+      if (annots->arrayGet(i, &obj1)->isDict()) {
+	obj1.dictLookup("Subtype", &obj2);
+	if (obj2.isName("Widget") ||
+	    obj2.isName("Stamp")) {
+	  widget = new FormWidget(obj1.getDict());
+	  if (widget->isOk()) {
+	    if (nWidgets >= size) {
+	      size += 16;
+	      widgets = (FormWidget **)grealloc(widgets,
+						size * sizeof(FormWidget *));
+	    }
+	    widgets[nWidgets++] = widget;
+	  } else {
+	    delete widget;
+	  }
+	}
+	obj2.free();
+      }
+      obj1.free();
+    }
+  }
+}
+
+FormWidgets::~FormWidgets() {
+  int i;
+
+  for (i = 0; i < nWidgets; ++i) {
+    delete widgets[i];
+  }
+  gfree(widgets);
+}