411 lines
8.2 KiB
C
411 lines
8.2 KiB
C
// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// Copyright(C) 2005,2006 Simon Howard
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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// 02111-1307, USA.
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//
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#include <stdlib.h>
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#include <string.h>
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#include "txt_gui.h"
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#include "txt_io.h"
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#include "txt_main.h"
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typedef struct txt_cliparea_s txt_cliparea_t;
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struct txt_cliparea_s
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{
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int x1, x2;
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int y1, y2;
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txt_cliparea_t *next;
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};
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// Array of border characters for drawing windows. The array looks like this:
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//
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// +-++
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// | ||
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// +-++
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// +-++
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static const int borders[4][4] =
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{
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{0xda, 0xc4, 0xc2, 0xbf},
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{0xb3, ' ', 0xb3, 0xb3},
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{0xc3, 0xc4, 0xc5, 0xb4},
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{0xc0, 0xc4, 0xc1, 0xd9},
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};
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static txt_cliparea_t *cliparea = NULL;
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#define VALID_X(x) ((x) >= cliparea->x1 && (x) < cliparea->x2)
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#define VALID_Y(y) ((y) >= cliparea->y1 && (y) < cliparea->y2)
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void TXT_DrawDesktopBackground(const char *title)
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{
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int i;
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unsigned char *screendata;
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unsigned char *p;
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screendata = TXT_GetScreenData();
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// Fill the screen with gradient characters
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p = screendata;
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for (i=0; i<TXT_SCREEN_W * TXT_SCREEN_H; ++i)
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{
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*p++ = 0xb1;
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*p++ = TXT_COLOR_GREY | (TXT_COLOR_BLUE << 4);
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}
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// Draw the top and bottom banners
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p = screendata;
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for (i=0; i<TXT_SCREEN_W; ++i)
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{
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*p++ = ' ';
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*p++ = TXT_COLOR_BLACK | (TXT_COLOR_GREY << 4);
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}
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p = screendata + (TXT_SCREEN_H - 1) * TXT_SCREEN_W * 2;
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for (i=0; i<TXT_SCREEN_W; ++i)
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{
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*p++ = ' ';
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*p++ = TXT_COLOR_BLACK | (TXT_COLOR_GREY << 4);
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}
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// Print the title
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TXT_GotoXY(0, 0);
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TXT_FGColor(TXT_COLOR_BLACK);
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TXT_BGColor(TXT_COLOR_GREY, 0);
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TXT_DrawString(" ");
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TXT_DrawString(title);
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}
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void TXT_DrawShadow(int x, int y, int w, int h)
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{
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unsigned char *screendata;
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unsigned char *p;
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int x1, y1;
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screendata = TXT_GetScreenData();
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for (y1=y; y1<y+h; ++y1)
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{
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p = screendata + (y1 * TXT_SCREEN_W + x) * 2;
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for (x1=x; x1<x+w; ++x1)
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{
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if (VALID_X(x1) && VALID_Y(y1))
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{
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p[1] = TXT_COLOR_DARK_GREY;
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}
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p += 2;
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}
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}
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}
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void TXT_DrawWindowFrame(const char *title, int x, int y, int w, int h)
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{
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int x1, y1;
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int bx, by;
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TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
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TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
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for (y1=y; y1<y+h; ++y1)
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{
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// Select the appropriate row and column in the borders
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// array to pick the appropriate character to draw at
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// this location.
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//
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// Draw a horizontal line on the third line down, so we
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// draw a box around the title.
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by = y1 == y ? 0 :
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y1 == y + 2 && title != NULL ? 2 :
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y1 == y + h - 1 ? 3 : 1;
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for (x1=x; x1<x+w; ++x1)
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{
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bx = x1 == x ? 0 :
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x1 == x + w - 1 ? 3 : 1;
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if (VALID_X(x1) && VALID_Y(y1))
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{
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TXT_GotoXY(x1, y1);
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TXT_PutChar(borders[by][bx]);
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}
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}
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}
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// Draw the title
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if (title != NULL)
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{
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TXT_GotoXY(x + 1, y + 1);
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TXT_BGColor(TXT_COLOR_GREY, 0);
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TXT_FGColor(TXT_COLOR_BLUE);
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for (x1=0; x1<w-2; ++x1)
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{
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TXT_DrawString(" ");
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}
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TXT_GotoXY(x + (w - strlen(title)) / 2, y + 1);
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TXT_DrawString(title);
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}
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// Draw the window's shadow.
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TXT_DrawShadow(x + 2, y + h, w, 1);
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TXT_DrawShadow(x + w, y + 1, 2, h);
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}
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void TXT_DrawSeparator(int x, int y, int w)
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{
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unsigned char *data;
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int x1;
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int b;
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data = TXT_GetScreenData();
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TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
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TXT_BGColor(TXT_WINDOW_BACKGROUND, 0);
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if (!VALID_Y(y))
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{
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return;
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}
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data += (y * TXT_SCREEN_W + x) * 2;
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for (x1=x; x1<x+w; ++x1)
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{
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TXT_GotoXY(x1, y);
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b = x1 == x ? 0 :
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x1 == x + w - 1 ? 3 :
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1;
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if (VALID_X(x1))
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{
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// Read the current value from the screen
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// Check that it matches what the window should look like if
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// there is no separator, then apply the separator
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if (*data == borders[1][b])
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{
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TXT_PutChar(borders[2][b]);
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}
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}
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data += 2;
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}
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}
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void TXT_DrawString(const char *s)
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{
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int x, y;
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int x1;
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const char *p;
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TXT_GetXY(&x, &y);
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if (VALID_Y(y))
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{
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x1 = x;
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for (p = s; *p != '\0'; ++p)
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{
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if (VALID_X(x1))
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{
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TXT_GotoXY(x1, y);
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TXT_PutChar(*p);
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}
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x1 += 1;
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}
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}
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TXT_GotoXY(x + strlen(s), y);
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}
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void TXT_DrawHorizScrollbar(int x, int y, int w, int cursor, int range)
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{
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int x1;
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int cursor_x;
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if (!VALID_Y(y))
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{
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return;
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}
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TXT_FGColor(TXT_COLOR_BLACK);
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TXT_BGColor(TXT_COLOR_GREY, 0);
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TXT_GotoXY(x, y);
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TXT_PutChar('\x1b');
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cursor_x = x + 1;
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if (range > 1)
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{
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cursor_x += (cursor * (w - 3)) / (range - 1);
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}
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if (cursor_x > x + w - 2)
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{
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cursor_x = x + w - 2;
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}
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for (x1=x+1; x1<x+w-1; ++x1)
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{
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if (VALID_X(x1))
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{
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if (x1 == cursor_x)
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{
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TXT_PutChar('\xdb');
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}
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else
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{
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TXT_PutChar('\xb1');
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}
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}
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}
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TXT_PutChar('\x1a');
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}
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void TXT_DrawVertScrollbar(int x, int y, int h, int cursor, int range)
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{
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int y1;
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int cursor_y;
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if (!VALID_X(x))
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{
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return;
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}
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TXT_FGColor(TXT_COLOR_BLACK);
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TXT_BGColor(TXT_COLOR_GREY, 0);
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TXT_GotoXY(x, y);
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TXT_PutChar('\x18');
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cursor_y = y + 1;
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if (cursor_y > y + h - 2)
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{
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cursor_y = y + h - 2;
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}
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if (range > 1)
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{
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cursor_y += (cursor * (h - 3)) / (range - 1);
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}
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for (y1=y+1; y1<y+h-1; ++y1)
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{
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if (VALID_Y(y1))
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{
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TXT_GotoXY(x, y1);
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if (y1 == cursor_y)
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{
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TXT_PutChar('\xdb');
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}
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else
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{
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TXT_PutChar('\xb1');
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}
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}
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}
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TXT_GotoXY(x, y + h - 1);
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TXT_PutChar('\x19');
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}
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void TXT_InitClipArea(void)
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{
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if (cliparea == NULL)
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{
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cliparea = malloc(sizeof(txt_cliparea_t));
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cliparea->x1 = 0;
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cliparea->x2 = TXT_SCREEN_W;
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cliparea->y1 = 1;
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cliparea->y2 = TXT_SCREEN_H - 1;
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cliparea->next = NULL;
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}
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}
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void TXT_PushClipArea(int x1, int x2, int y1, int y2)
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{
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txt_cliparea_t *newarea;
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newarea = malloc(sizeof(txt_cliparea_t));
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// Set the new clip area to the intersection of the old
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// area and the new one.
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newarea->x1 = cliparea->x1;
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newarea->x2 = cliparea->x2;
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newarea->y1 = cliparea->y1;
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newarea->y2 = cliparea->y2;
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if (x1 > newarea->x1)
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newarea->x1 = x1;
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if (x2 < newarea->x2)
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newarea->x2 = x2;
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if (y1 > newarea->y1)
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newarea->y1 = y1;
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if (y2 < newarea->y2)
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newarea->y2 = y2;
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#if 0
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printf("New scrollable area: %i,%i-%i,%i\n", x1, y1, x2, y2);
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#endif
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// Hook into the list
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newarea->next = cliparea;
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cliparea = newarea;
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}
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void TXT_PopClipArea(void)
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{
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txt_cliparea_t *next_cliparea;
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// Never pop the last entry
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if (cliparea->next == NULL)
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return;
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// Unlink the last entry and delete
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next_cliparea = cliparea->next;
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free(cliparea);
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cliparea = next_cliparea;
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}
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