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