Initial revision

1 files changed, 366 insertions, 0 deletions

diff --git a/gc/cord/de_win.c b/gc/cord/de_win.c
new file mode 100644
index 0000000..fedbfbe
--- /dev/null
+++ b/gc/cord/de_win.c
@@ -0,0 +1,366 @@
+/*
+ * Copyright (c) 1994 by Xerox Corporation.  All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* Boehm, February 6, 1995 12:29 pm PST */
+
+/*
+ * The MS Windows specific part of de.  
+ * This started as the generic Windows application template
+ * made available by Rob Haack (rhaack@polaris.unm.edu), but
+ * significant parts didn't survive to the final version.
+ *
+ * This was written by a nonexpert windows programmer.
+ */
+
+
+#include "windows.h"
+#include "gc.h"
+#include "cord.h"
+#include "de_cmds.h"
+#include "de_win.h"
+
+int LINES = 0;
+int COLS = 0;
+
+char       szAppName[]     = "DE";
+char       FullAppName[]   = "Demonstration Editor";
+
+HWND        hwnd;
+
+void de_error(char *s)
+{
+    MessageBox( hwnd, (LPSTR) s,
+                (LPSTR) FullAppName,
+                MB_ICONINFORMATION | MB_OK );
+    InvalidateRect(hwnd, NULL, TRUE);
+}
+
+int APIENTRY WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
+                      LPSTR command_line, int nCmdShow)
+{
+   MSG         msg;
+   WNDCLASS    wndclass;
+   HANDLE      hAccel;
+
+   if (!hPrevInstance)
+   {
+      wndclass.style          = CS_HREDRAW | CS_VREDRAW;
+      wndclass.lpfnWndProc    = WndProc;
+      wndclass.cbClsExtra     = 0;
+      wndclass.cbWndExtra     = DLGWINDOWEXTRA;
+      wndclass.hInstance      = hInstance;
+      wndclass.hIcon          = LoadIcon (hInstance, szAppName);
+      wndclass.hCursor        = LoadCursor (NULL, IDC_ARROW);
+      wndclass.hbrBackground  = GetStockObject(WHITE_BRUSH);
+      wndclass.lpszMenuName   = "DE";
+      wndclass.lpszClassName  = szAppName;
+
+      if (RegisterClass (&wndclass) == 0) {
+          char buf[50];
+   	
+   	  sprintf(buf, "RegisterClass: error code: 0x%X", GetLastError());
+   	  de_error(buf);
+   	  return(0);
+      }
+   }
+   
+   /* Empirically, the command line does not include the command name ...
+   if (command_line != 0) {
+       while (isspace(*command_line)) command_line++;
+       while (*command_line != 0 && !isspace(*command_line)) command_line++;
+       while (isspace(*command_line)) command_line++;
+   } */
+   
+   if (command_line == 0 || *command_line == 0) {
+        de_error("File name argument required");
+        return( 0 );
+   } else {
+        char *p = command_line;
+        
+        while (*p != 0 && !isspace(*p)) p++;
+   	arg_file_name = CORD_to_char_star(
+   			    CORD_substr(command_line, 0, p - command_line));
+   }
+
+   hwnd = CreateWindow (szAppName,
+   			FullAppName,
+   			WS_OVERLAPPEDWINDOW | WS_CAPTION, /* Window style */
+   			CW_USEDEFAULT, 0, /* default pos. */
+   			CW_USEDEFAULT, 0, /* default width, height */
+   			NULL,	/* No parent */
+   			NULL, 	/* Window class menu */
+   			hInstance, NULL);
+   if (hwnd == NULL) {
+   	char buf[50];
+   	
+   	sprintf(buf, "CreateWindow: error code: 0x%X", GetLastError());
+   	de_error(buf);
+   	return(0);
+   }
+
+   ShowWindow (hwnd, nCmdShow);
+
+   hAccel = LoadAccelerators( hInstance, szAppName );
+   
+   while (GetMessage (&msg, NULL, 0, 0))
+   {
+      if( !TranslateAccelerator( hwnd, hAccel, &msg ) )
+      {
+         TranslateMessage (&msg);
+         DispatchMessage (&msg);
+      }
+   }
+   return msg.wParam;
+}
+
+/* Return the argument with all control characters replaced by blanks.	*/
+char * plain_chars(char * text, size_t len)
+{
+    char * result = GC_MALLOC_ATOMIC(len + 1);
+    register size_t i;
+    
+    for (i = 0; i < len; i++) {
+       if (iscntrl(text[i])) {
+           result[i] = ' ';
+       } else {
+           result[i] = text[i];
+       }
+    }
+    result[len] = '\0';
+    return(result);
+}
+
+/* Return the argument with all non-control-characters replaced by 	*/
+/* blank, and all control characters c replaced by c + 32.		*/
+char * control_chars(char * text, size_t len)
+{
+    char * result = GC_MALLOC_ATOMIC(len + 1);
+    register size_t i;
+    
+    for (i = 0; i < len; i++) {
+       if (iscntrl(text[i])) {
+           result[i] = text[i] + 0x40;
+       } else {
+           result[i] = ' ';
+       }
+    }
+    result[len] = '\0';
+    return(result);
+}
+
+int char_width;
+int char_height;
+
+void get_line_rect(int line, int win_width, RECT * rectp)
+{
+    rectp -> top = line * char_height;
+    rectp -> bottom = rectp->top + char_height;
+    rectp -> left = 0;
+    rectp -> right = win_width;
+}
+
+int caret_visible = 0;	/* Caret is currently visible.	*/
+
+int screen_was_painted = 0;/* Screen has been painted at least once.	*/
+
+void update_cursor(void);
+
+LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
+                          WPARAM wParam, LPARAM lParam)
+{
+   static FARPROC lpfnAboutBox;
+   static HANDLE  hInstance;
+   HDC dc;
+   PAINTSTRUCT ps;
+   RECT client_area;
+   RECT this_line;
+   RECT dummy;
+   TEXTMETRIC tm;
+   register int i;
+   int id;
+
+   switch (message)
+   {
+      case WM_CREATE:
+           hInstance = ( (LPCREATESTRUCT) lParam)->hInstance;
+           lpfnAboutBox = MakeProcInstance( (FARPROC) AboutBox, hInstance );
+           dc = GetDC(hwnd);
+           SelectObject(dc, GetStockObject(SYSTEM_FIXED_FONT));
+           GetTextMetrics(dc, &tm);
+           ReleaseDC(hwnd, dc);
+           char_width = tm.tmAveCharWidth;
+           char_height = tm.tmHeight + tm.tmExternalLeading;
+           GetClientRect(hwnd, &client_area);
+      	   COLS = (client_area.right - client_area.left)/char_width;
+      	   LINES = (client_area.bottom - client_area.top)/char_height;
+      	   generic_init();
+           return(0);
+
+      case WM_CHAR:
+      	   if (wParam == QUIT) {
+      	       SendMessage( hwnd, WM_CLOSE, 0, 0L );
+      	   } else {
+      	       do_command(wParam);
+      	   }
+      	   return(0);
+      
+      case WM_SETFOCUS:
+      	   CreateCaret(hwnd, NULL, char_width, char_height);
+      	   ShowCaret(hwnd);
+      	   caret_visible = 1;
+      	   update_cursor();
+      	   return(0);
+      	   
+      case WM_KILLFOCUS:
+      	   HideCaret(hwnd);
+      	   DestroyCaret();
+      	   caret_visible = 0;
+      	   return(0);
+      	   
+      case WM_LBUTTONUP:
+      	   {
+      	       unsigned xpos = LOWORD(lParam);	/* From left	*/
+      	       unsigned ypos = HIWORD(lParam);	/* from top */
+      	       
+      	       set_position( xpos/char_width, ypos/char_height );
+      	       return(0);
+      	   }
+      	   
+      case WM_COMMAND:
+      	   id = LOWORD(wParam);
+      	   if (id & EDIT_CMD_FLAG) {
+               if (id & REPEAT_FLAG) do_command(REPEAT);
+               do_command(CHAR_CMD(id));
+               return( 0 );
+           } else {
+             switch(id) {
+               case IDM_FILEEXIT:
+                  SendMessage( hwnd, WM_CLOSE, 0, 0L );
+                  return( 0 );
+
+               case IDM_HELPABOUT:
+                  if( DialogBox( hInstance, "ABOUTBOX",
+                                 hwnd, lpfnAboutBox ) );
+                     InvalidateRect( hwnd, NULL, TRUE );
+                  return( 0 );
+	       case IDM_HELPCONTENTS:
+	     	  de_error(
+	     	       "Cursor keys: ^B(left) ^F(right) ^P(up) ^N(down)\n"
+	     	       "Undo: ^U    Write: ^W   Quit:^D  Repeat count: ^R[n]\n"
+	     	       "Top: ^T   Locate (search, find): ^L text ^L\n");
+	     	  return( 0 );
+	     }
+	   }
+           break;
+
+      case WM_CLOSE:
+           DestroyWindow( hwnd );
+           return 0;
+
+      case WM_DESTROY:
+           PostQuitMessage (0);
+	   GC_win32_free_heap();
+           return 0;
+      
+      case WM_PAINT:
+      	   dc = BeginPaint(hwnd, &ps);
+      	   GetClientRect(hwnd, &client_area);
+      	   COLS = (client_area.right - client_area.left)/char_width;
+      	   LINES = (client_area.bottom - client_area.top)/char_height;
+      	   SelectObject(dc, GetStockObject(SYSTEM_FIXED_FONT));
+      	   for (i = 0; i < LINES; i++) {
+      	       get_line_rect(i, client_area.right, &this_line);
+      	       if (IntersectRect(&dummy, &this_line, &ps.rcPaint)) {
+      	           CORD raw_line = retrieve_screen_line(i);
+      	           size_t len = CORD_len(raw_line);
+      	           char * text = CORD_to_char_star(raw_line);
+      	           		/* May contain embedded NULLs	*/
+      	           char * plain = plain_chars(text, len);
+      	           char * blanks = CORD_to_char_star(CORD_chars(' ',
+      	           				                COLS - len));
+      	           char * control = control_chars(text, len);
+#		   define RED RGB(255,0,0)
+      	           
+      	           SetBkMode(dc, OPAQUE);
+      	           SetTextColor(dc, GetSysColor(COLOR_WINDOWTEXT));
+      	           
+      	           TextOut(dc, this_line.left, this_line.top,
+      	           	   plain, len);
+      	           TextOut(dc, this_line.left + len * char_width, this_line.top,
+      	           	   blanks, COLS - len);
+      	           SetBkMode(dc, TRANSPARENT);
+      	           SetTextColor(dc, RED);
+      	           TextOut(dc, this_line.left, this_line.top,
+      	           	   control, strlen(control));
+      	       }
+      	   }
+      	   EndPaint(hwnd, &ps);
+      	   screen_was_painted = 1;
+      	   return 0;
+   }
+   return DefWindowProc (hwnd, message, wParam, lParam);
+}
+
+int last_col;
+int last_line;
+
+void move_cursor(int c, int l)
+{
+    last_col = c;
+    last_line = l;
+    
+    if (caret_visible) update_cursor();
+}
+
+void update_cursor(void)
+{
+    SetCaretPos(last_col * char_width, last_line * char_height);
+    ShowCaret(hwnd);
+}
+
+void invalidate_line(int i)
+{
+    RECT line;
+    
+    if (!screen_was_painted) return;
+    	/* Invalidating a rectangle before painting seems result in a	*/
+    	/* major performance problem.					*/
+    get_line_rect(i, COLS*char_width, &line);
+    InvalidateRect(hwnd, &line, FALSE);
+}
+
+LRESULT CALLBACK AboutBox( HWND hDlg, UINT message,
+                           WPARAM wParam, LPARAM lParam )
+{
+   switch( message )
+   {
+      case WM_INITDIALOG:
+           SetFocus( GetDlgItem( hDlg, IDOK ) );
+           break;
+
+      case WM_COMMAND:
+           switch( wParam )
+           {
+              case IDOK:
+                   EndDialog( hDlg, TRUE );
+                   break;
+           }
+           break;
+
+      case WM_CLOSE:
+           EndDialog( hDlg, TRUE );
+           return TRUE;
+
+   }
+   return FALSE;
+}
+