Some printing related improvements:

* libprint based drivers can now show a preview window and show progress
  window while printing contributed in part by Hartmut Reh.
* Libprint and PCL6 driver bug fixes.
* Code clean-up (removed code duplications, coding style, copyright text)

Builds under Linux. Not tested under BeOS.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19882 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/print/utils/Utils.h

@@ -0,0 +1,132 @@
+/*
+
+PDF Writer printer driver.
+
+Copyright (c) 2001, 2002 OpenBeOS. 
+Copyright (c) 2005 Haiku.
+
+Authors: 
+	Philippe Houdoin
+	Simon Gauvin	
+	Michael Pfeiffer
+	
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+*/
+
+#ifndef _UTILS_H
+#define _UTILS_H
+
+#include <Window.h>
+#include <Message.h>
+#include <MessageFilter.h>
+
+
+void AddString(BMessage* m, const char* name, const char* value);
+
+// set or replace a value in a BMessage
+void SetRect(BMessage* msg, const char* name, BRect rect);
+void SetFloat(BMessage* msg, const char* name, float value);
+void SetInt32(BMessage* msg, const char* name, int32 value);
+
+class EscapeMessageFilter : public BMessageFilter 
+{
+private:
+	BWindow *fWindow;
+	int32    fWhat;
+		
+public:
+	EscapeMessageFilter(BWindow *window, int32 what);
+	filter_result Filter(BMessage *msg, BHandler **target);
+};
+
+
+#define BEGINS_CHAR(byte) ((byte & 0xc0) != 0x80)
+
+
+template <class T>
+class TList {
+private:
+	BList fList;
+	typedef int (*sort_func)(const void*, const void*);
+	
+public:
+	virtual ~TList();
+	void     MakeEmpty();
+	int32    CountItems() const;
+	T*       ItemAt(int32 index) const;
+	void     AddItem(T* p);
+	T*       RemoveItem(int i);
+	T*       Items();
+	void     SortItems(int (*comp)(const T**, const T**));
+};
+
+// TList
+template<class T>
+TList<T>::~TList() {
+	MakeEmpty();
+}
+
+
+template<class T>
+void TList<T>::MakeEmpty() {
+	const int32 n = CountItems();
+	for (int i = 0; i < n; i++) {
+		delete ItemAt(i);
+	}
+	fList.MakeEmpty();
+}
+
+
+template<class T>
+int32 TList<T>::CountItems() const {
+	return fList.CountItems();
+}
+
+
+template<class T>
+T* TList<T>::ItemAt(int32 index) const {
+	return (T*)fList.ItemAt(index);
+}
+
+
+template<class T>
+void TList<T>::AddItem(T* p) {
+	fList.AddItem(p);
+}
+
+template<class T>
+T* TList<T>::RemoveItem(int i) {
+	return (T*)fList.RemoveItem(i);
+}
+
+
+template<class T>
+T* TList<T>::Items() {
+	return (T*)fList.Items();
+}
+
+
+template<class T>
+void TList<T>::SortItems(int (*comp)(const T**, const T**)) {
+	sort_func sort = (sort_func)comp;
+	fList.SortItems(sort);
+}
+
+#endif