tmouse.cpp

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//Telnet Win32 : an ANSI telnet client.
//Copyright (C) 1998  Paul Brannan
//Copyright (C) 1998  I.Ioannou
//Copyright (C) 1997  Brad Johnson
//
//This program is free software; you can redistribute it and/or
//modify it under the terms of the GNU General Public License
//as published by the Free Software Foundation; either version 2
//of the License, or (at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
//I.Ioannou
//roryt@hol.gr
//
 
// TMouse.cpp
// A simple class for handling mouse events
// Written by Paul Brannan <pbranna@clemson.edu>
// Last modified August 30, 1998
 
#include "precomp.h"
 
TMouse::TMouse(Tnclip &RefClipboard): Clipboard(RefClipboard) {
    hConsole = GetStdHandle(STD_INPUT_HANDLE);
    hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
}
 
TMouse::~TMouse() {
}
 
void TMouse::get_coords(COORD *start_coords, COORD *end_coords,
                COORD *first_coords, COORD *last_coords) {
    if(end_coords->Y < start_coords->Y ||
        (end_coords->Y == start_coords->Y && end_coords->X < start_coords->X))
    {
        *first_coords = *end_coords;
        *last_coords = *start_coords;
    } else {
        *first_coords = *start_coords;
        *last_coords = *end_coords;
    }
    last_coords->X++;
}
 
void TMouse::doMouse_init() {
    GetConsoleScreenBufferInfo(hStdout, &ConsoleInfo);
    chiBuffer = newBuffer();
    saveScreen(chiBuffer);
}
 
void TMouse::doMouse_cleanup() {
    restoreScreen(chiBuffer);
    delete[] chiBuffer;
}
 
void TMouse::move_mouse(COORD start_coords, COORD end_coords) {
    COORD screen_start = {0, 0};
    COORD first_coords, last_coords;
    DWORD Result;
 
    FillConsoleOutputAttribute(hStdout, normal,
        ConsoleInfo.dwSize.X * ConsoleInfo.dwSize.Y, screen_start, &Result);
 
    get_coords(&start_coords, &end_coords, &first_coords, &last_coords);
    FillConsoleOutputAttribute(hStdout, inverse, ConsoleInfo.dwSize.X *
        (last_coords.Y - first_coords.Y) + (last_coords.X - first_coords.X),
        first_coords, &Result);
}
 
void TMouse::doClip(COORD start_coords, COORD end_coords) {
    // COORD screen_start = {0, 0};
    COORD first_coords, last_coords;
    DWORD Result;
 
    get_coords(&start_coords, &end_coords, &first_coords, &last_coords);
 
    // Allocate the minimal size buffer
    int data_size = 3 + ConsoleInfo.dwSize.X *
        (last_coords.Y - first_coords.Y) + (last_coords.X - first_coords.X);
    HGLOBAL clipboard_data = GlobalAlloc(GMEM_MOVEABLE + GMEM_DDESHARE,
        data_size);
    LPVOID mem_ptr = GlobalLock(clipboard_data);
 
    // Reset data_size so we can count the actual data size
    data_size = 0;
 
    // Read the console, put carriage returns at the end of each line if
    // reading more than one line (Paul Brannan 9/17/98)
    for(int j = first_coords.Y; j <= last_coords.Y; j++) {
 
        // Read line at (0,j)
        COORD coords;
        coords.X = 0;
        coords.Y = j;
        int length = ConsoleInfo.dwSize.X;
 
        if(j == first_coords.Y) {
            coords.X = first_coords.X;
            length = ConsoleInfo.dwSize.X - first_coords.X;
        } else {
            // Add a carriage return to the end of the previous line
            *((char *)mem_ptr + data_size++) = '\r';
            *((char *)mem_ptr + data_size++) = '\n';
        }
 
        if(j == last_coords.Y) {
            length -= (ConsoleInfo.dwSize.X - last_coords.X);
        }
 
        // Read the next line
        ReadConsoleOutputCharacter(hStdout, (LPTSTR)((char *)mem_ptr +
            data_size), length, coords, &Result);
        data_size += Result;
 
        // Strip the spaces at the end of the line
        if((j != last_coords.Y) && (first_coords.Y != last_coords.Y))
            while(*((char *)mem_ptr + data_size - 1) == ' ') data_size--;
    }
    if(first_coords.Y != last_coords.Y) {
        // Add a carriage return to the end of the last line
        *((char *)mem_ptr + data_size++) = '\r';
        *((char *)mem_ptr + data_size++) = '\n';
    }
 
    *((char *)mem_ptr + data_size) = 0;
    GlobalUnlock(clipboard_data);
 
    Clipboard.Copy(clipboard_data);
}
 
void TMouse::doMouse() {
    INPUT_RECORD InputRecord;
    DWORD Result;
    InputRecord.EventType = KEY_EVENT; // just in case
    while(InputRecord.EventType != MOUSE_EVENT) {
        if (!ReadConsoleInput(hConsole, &InputRecord, 1, &Result))
            return; // uh oh!  we don't know the starting coordinates!
    }
    if(InputRecord.Event.MouseEvent.dwButtonState == 0) return;
    if(!(InputRecord.Event.MouseEvent.dwButtonState &
        FROM_LEFT_1ST_BUTTON_PRESSED)) {
        Clipboard.Paste();
        return;
    }
 
    COORD screen_start = {0, 0};
    COORD start_coords = InputRecord.Event.MouseEvent.dwMousePosition;
    COORD end_coords = start_coords;
    BOOL done = FALSE;
 
    // init vars
    doMouse_init();
    int normal_bg = ini.get_normal_bg();
    int normal_fg = ini.get_normal_fg();
    if(normal_bg == -1) normal_bg = 0;      // FIX ME!!  This is just a hack
    if(normal_fg == -1) normal_fg = 7;
    normal = (normal_bg << 4) | normal_fg;
    inverse = (normal_fg << 4) | normal_bg;
 
    // make screen all one attribute
    FillConsoleOutputAttribute(hStdout, normal, ConsoleInfo.dwSize.X *
        ConsoleInfo.dwSize.Y, screen_start, &Result);
 
    while(!done) {
 
        switch (InputRecord.EventType) {
        case MOUSE_EVENT:
            switch(InputRecord.Event.MouseEvent.dwEventFlags) {
            case 0: // only copy if the mouse button has been released
                if(!InputRecord.Event.MouseEvent.dwButtonState) {
                    doClip(start_coords, end_coords);
                    done = TRUE;
                }
                break;
 
            case MOUSE_MOVED:
                end_coords = InputRecord.Event.MouseEvent.dwMousePosition;
                move_mouse(start_coords, end_coords);
                break;
            }
            break;
        // If we are changing focus, we don't want to highlight anything
        // (Paul Brannan 9/2/98)
        case FOCUS_EVENT:
            return;
        }
 
        WaitForSingleObject(hConsole, INFINITE);
        if (!ReadConsoleInput(hConsole, &InputRecord, 1, &Result))
            done = TRUE;
 
    }
 
    doMouse_cleanup();
}
 
void TMouse::scrollMouse() {
    doMouse();
}