Long standing scroll bug fixed!
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@ -15,6 +15,9 @@
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#include "config.h"
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#include "debug.h"
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static void GENERIC_MoveLine(char row1, char row2, char col1, char col2);
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static void GENERIC_ClearLine(char row, char col1, char col2, int bgcolor,
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int attribute);
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void GENERIC_Start()
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{
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/* Here, we only want to add a driver if there is not one already
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@ -38,11 +41,9 @@ void GENERIC_Start()
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void GENERIC_ClearWindow(char row1, char col1, char row2, char col2,
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int bg_color, int attribute)
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{
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char trow, tcol;
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char x, y;
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char trow, tcol, x;
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int old_refresh;
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TRACE(console, "GENERIC_ClearWindow()\n");
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/* Abort if we have only partial functionality */
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if (!(driver.getCursorPosition && driver.moveCursor && driver.write))
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return;
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@ -52,102 +53,73 @@ void GENERIC_ClearWindow(char row1, char col1, char row2, char col2,
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CONSOLE_GetCursorPosition(&trow, &tcol);
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for (x = row1; x < row2; x++)
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{
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CONSOLE_MoveCursor(x, col1);
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for (x = row1; x <= row2; x++)
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GENERIC_ClearLine(x, col1, col2, bg_color, attribute);
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for (y = col1; y < col2; y++)
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{
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CONSOLE_Write(' ', 0, bg_color, attribute);
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}
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}
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CONSOLE_MoveCursor(trow, tcol);
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CONSOLE_SetRefresh(old_refresh);
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TRACE(console, "GENERIC_ClearWindow() completed.\n");
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}
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/* These are in-progress. I just haven't finished them yet... */
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void GENERIC_ScrollUpWindow(char row1, char col1, char row2, char col2,
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char lines, int bg_color, int attribute)
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{
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char trow, tcol;
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int x, y;
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char ch;
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int bg, fg, attr;
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int old_refresh;
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/* Scroll Up Window: Characters go down */
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TRACE(console, "GENERIC_ScrollUpWindow()\n");
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char trow, tcol;
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int old_refresh, x;
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TRACE(console, "Scroll Up %d lines from %d to %d.\n", lines, row1,
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row2);
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/* Abort if we have only partial functionality */
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if (!(driver.getCursorPosition && driver.moveCursor && driver.write
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&& driver.getCharacterAtCursor && driver.clearWindow))
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return;
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/* Save initial state... */
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old_refresh = CONSOLE_GetRefresh();
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CONSOLE_SetRefresh(FALSE);
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CONSOLE_GetCursorPosition(&trow, &tcol);
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for (x = row1 + lines; x < row2; x++)
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for (x = row1 + lines; x <= row2; x++)
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{
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for (y = col1; y < col2; y++)
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{
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CONSOLE_MoveCursor(x, y);
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CONSOLE_GetCharacterAtCursor(&ch, &fg, &bg, &attr);
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CONSOLE_MoveCursor(x - lines, y);
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CONSOLE_Write(ch, fg, bg, attr);
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GENERIC_MoveLine(x, x - lines, col1, col2);
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GENERIC_ClearLine(x, col1, col2, bg_color, attribute);
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}
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}
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CONSOLE_ClearWindow(row2 - lines, col1, row2, col2, bg_color,
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attribute);
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/* Restore State */
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CONSOLE_MoveCursor(trow, tcol);
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CONSOLE_SetRefresh(old_refresh);
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TRACE(console, "GENERIC_ScrollUpWindow() completed.\n");
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}
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void GENERIC_ScrollDownWindow(char row1, char col1, char row2, char col2,
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char lines, int bg_color, int attribute)
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{
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char trow, tcol;
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int x, y;
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char ch;
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int bg, fg, attr;
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int old_refresh;
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/* Scroll Down Window: Characters go up */
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TRACE(console, "GENERIC_ScrollDownWindow()\n");
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char trow, tcol;
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int old_refresh, x;
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/* Abort if we have only partial functionality */
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if (!(driver.getCursorPosition && driver.moveCursor && driver.write
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&& driver.getCharacterAtCursor && driver.clearWindow))
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return;
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/* Save initial state... */
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old_refresh = CONSOLE_GetRefresh();
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CONSOLE_SetRefresh(FALSE);
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CONSOLE_GetCursorPosition(&trow, &tcol);
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for (x = row2 - lines; x > row1; x--)
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for (x = row2; x >= row1 + lines; x--)
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{
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for (y = col1; y < col2; y++)
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{
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CONSOLE_MoveCursor(x, y);
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CONSOLE_GetCharacterAtCursor(&ch, &fg, &bg, &attr);
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CONSOLE_MoveCursor(x + lines, y);
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CONSOLE_Write(ch, fg, bg, attr);
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GENERIC_MoveLine(x, x + lines, col1, col2);
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GENERIC_ClearLine(x, col1, col1, bg_color, attribute);
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}
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}
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CONSOLE_ClearWindow(row1, col1, row1 + lines, col2, bg_color,
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attribute);
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/* Restore State */
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CONSOLE_MoveCursor(trow, tcol);
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CONSOLE_SetRefresh(old_refresh);
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TRACE(console, "GENERIC_ScrollDownWindow() completed.\n");
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}
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char GENERIC_GetCharacter()
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@ -162,3 +134,49 @@ char GENERIC_GetCharacter()
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return ch;
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}
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static void GENERIC_ClearLine(char row, char col1, char col2, int bgcolor,
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int attribute)
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{
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/* This function is here to simplify the logic of the scroll and clear
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functions but may be useful elsewhere. If it can be used from
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outside here, it should be made non-static */
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int x;
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TRACE(console, "Clear Line: %d from %d to %d.\n", row, col1, col2);
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for (x = col1; x <= col2; x++)
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{
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CONSOLE_MoveCursor(row, x);
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CONSOLE_Write(' ', 0, 0, 0);
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}
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/* Assume that the calling function will make sure that the cursor is
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repositioned properly. If this becomes non-static, that will need to be
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changed. */
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}
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static void GENERIC_MoveLine(char row1, char row2, char col1, char col2)
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{
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/* This function is here to simplify the logic of the scroll and clear
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functions but may be useful elsewhere. If it can be used from
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outside here, it should be made non-static */
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int x;
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int bg_color, fg_color, attribute;
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char ch;
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TRACE(console, "Move Line: Move %d to %d.\n", row1, row2);
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for (x = col1; x <= col2; x++)
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{
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CONSOLE_MoveCursor(row1, x);
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CONSOLE_GetCharacterAtCursor(&ch, &fg_color, &bg_color, &attribute);
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CONSOLE_MoveCursor(row2, x);
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CONSOLE_Write(ch, fg_color, bg_color, attribute);
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}
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/* Assume that the calling function will make sure that the cursor is
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repositioned properly. If this becomes non-static, that will need to be
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changed. */
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}
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