* fhandler.h: Update copyright.
(cltype): New enum. (dev_console::console_attrs): Define struct name. (dev_console::console_attrs::set_cl_x): New function. (dev_console::console_attrs::set_cl_y): New function. (fhandler_console::clear_screen): Redefine input params. * fhandler_console.cc: Update copyright. Throughout, reflect change in arguments to fhandler_console::clear_screeen. (fhandler_console::mouse_aware): Simplify logic slightly. (fhandler_console::scroll_screen): Remove hopefully obsolete win95 code. (dev_console::console_attrs::set_cl_x): New function. (dev_console::console_attrs::set_cl_y): New function. (fhandler_console::clear_screen): Redefine input params. Calculate position based on enum value. (region_split): Change arguments. Simplify. (ReadConsoleOutputWrapper): Remove coord argument since we now always use 0, 0. Send extra arguments to region_split.
This commit is contained in:
Christopher Faylor
parent
1affdef86f
commit
36383c6f6e
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
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@ -1,7 +1,7 @@
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/* fhandler.h
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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2007, 2008, 2009, 2010, 2011, 2012, 2013 Red Hat, Inc.
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2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
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This file is part of Cygwin.
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@ -1246,6 +1246,13 @@ enum ansi_intensity
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#define gotrparen 9
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#define MAXARGS 10
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enum cltype
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{
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cl_curr_pos = 1,
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cl_disp_beg,
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cl_disp_end
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};
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class dev_console
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{
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WORD default_color, underline_color, dim_color;
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@ -1286,7 +1293,7 @@ class dev_console
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{
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short Top, Bottom;
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} scroll_region;
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struct
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struct console_attrs
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{
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SHORT winTop;
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SHORT winBottom;
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@ -1294,6 +1301,8 @@ class dev_console
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COORD dwBufferSize;
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COORD dwCursorPosition;
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WORD wAttributes;
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int set_cl_x (cltype);
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int set_cl_y (cltype);
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} info;
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COORD dwLastCursorPosition;
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@ -1346,7 +1355,7 @@ private:
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/* Output calls */
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void set_default_attr ();
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void clear_screen (int, int, int, int);
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void clear_screen (cltype, cltype, cltype, cltype);
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void scroll_screen (int, int, int, int, int, int);
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void cursor_set (bool, int, int);
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void cursor_get (int *, int *);
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@ -1,7 +1,7 @@
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/* fhandler_console.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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2007, 2008, 2009, 2010, 2011, 2012, 2013 Red Hat, Inc.
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2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
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This file is part of Cygwin.
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@ -294,16 +294,12 @@ fhandler_console::mouse_aware (MOUSE_EVENT_RECORD& mouse_event)
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/* Adjust mouse position by window scroll buffer offset
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and remember adjusted position in state for use by read() */
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CONSOLE_SCREEN_BUFFER_INFO now;
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if (GetConsoleScreenBufferInfo (get_output_handle (), &now))
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{
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dev_state.dwMousePosition.X = mouse_event.dwMousePosition.X - now.srWindow.Left;
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dev_state.dwMousePosition.Y = mouse_event.dwMousePosition.Y - now.srWindow.Top;
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}
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else
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{
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/* Cannot adjust position by window scroll buffer offset */
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return 0;
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}
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if (!GetConsoleScreenBufferInfo (get_output_handle (), &now))
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/* Cannot adjust position by window scroll buffer offset */
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return 0;
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dev_state.dwMousePosition.X = mouse_event.dwMousePosition.X - now.srWindow.Left;
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dev_state.dwMousePosition.Y = mouse_event.dwMousePosition.Y - now.srWindow.Top;
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return ((mouse_event.dwEventFlags == 0 || mouse_event.dwEventFlags == DOUBLE_CLICK)
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&& mouse_event.dwButtonState != dev_state.dwLastButtonState)
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@ -315,71 +311,6 @@ fhandler_console::mouse_aware (MOUSE_EVENT_RECORD& mouse_event)
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|| dev_state.use_mouse >= 3));
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}
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/* The following three functions were adapted (i.e., mildly modified) from
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http://stackoverflow.com/questions/14699043/replacement-to-systemcolor */
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/* Split a rectangular region into two smaller rectangles based on the
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largest dimension. */
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static void
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region_split (SHORT width, SHORT height, COORD coord,
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const SMALL_RECT& region, COORD& coord_a,
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SMALL_RECT& region_a, COORD& coord_b,
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SMALL_RECT& region_b)
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{
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coord_a = coord_b = coord;
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region_a = region_b = region;
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if (height >= width)
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{
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SHORT half = height / 2;
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coord_b.Y += half;
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region_b.Top += half;
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region_a.Bottom = region_b.Top - 1;
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}
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else
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{
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SHORT half = width / 2;
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coord_b.X += half;
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region_b.Left += half;
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region_a.Right = region_b.Left - 1;
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}
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}
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/* Utility function to figure out the distance between two points. */
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static SHORT
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delta (SHORT first, SHORT second)
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{
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return (second >= first) ? (second - first + 1) : 0;
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}
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/* Subdivide the ReadConsoleInput operation into smaller and smaller chunks as
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needed until it succeeds in reading the entire screen buffer. */
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static BOOL
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ReadConsoleOutputWrapper (HANDLE h, PCHAR_INFO buf,
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COORD bufsiz, COORD coord,
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SMALL_RECT& region)
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{
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SHORT width = delta (region.Left, region.Right);
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SHORT height = delta (region.Top, region.Bottom);
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if ((width == 0) || (height == 0))
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return TRUE;
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BOOL success = ReadConsoleOutputW (h, buf, bufsiz, coord, ®ion);
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if (success)
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/* it worked */;
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else if (GetLastError () == ERROR_NOT_ENOUGH_MEMORY && (width * height) > 1)
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{
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COORD coord_a, coord_b;
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SMALL_RECT region_a, region_b;
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region_split (width, height, coord, region, coord_a, region_a,
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coord_b, region_b);
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success = ReadConsoleOutputWrapper (h, buf, bufsiz, coord_a, region_a)
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&& ReadConsoleOutputWrapper (h, buf, bufsiz, coord_b, region_b);
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}
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return success;
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}
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void __reg3
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fhandler_console::read (void *pv, size_t& buflen)
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{
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@ -870,6 +801,7 @@ fhandler_console::scroll_screen (int x1, int y1, int x2, int y2, int xn, int yn)
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fill.Attributes = dev_state.current_win32_attr;
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ScrollConsoleScreenBuffer (get_output_handle (), &sr1, &sr2, dest, &fill);
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#if 0 /* CGF: 2014-01-04 Assuming that we don't need this anymore */
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/* ScrollConsoleScreenBuffer on Windows 95 is buggy - when scroll distance
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* is more than half of screen, filling doesn't work as expected */
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@ -879,6 +811,7 @@ fhandler_console::scroll_screen (int x1, int y1, int x2, int y2, int xn, int yn)
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clear_screen (0, 1 + dest.Y + sr1.Bottom - sr1.Top, sr2.Right, sr2.Bottom);
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else /* reverse scroll */
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clear_screen (0, sr1.Top, sr2.Right, dest.Y - 1);
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#endif
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}
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int
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@ -1257,12 +1190,32 @@ dev_console::set_default_attr ()
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set_color (NULL);
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}
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int
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dev_console::console_attrs::set_cl_x (cltype x)
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{
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if (x == cl_disp_beg)
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return 0;
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if (x == cl_disp_end)
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return dwWinSize.X - 1;
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return dwCursorPosition.X;
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}
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int
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dev_console::console_attrs::set_cl_y (cltype y)
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{
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if (y == cl_disp_end)
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return winBottom;
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if (y == cl_disp_beg)
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return winTop;
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return dwCursorPosition.Y;
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}
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/*
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* Clear the screen context from x1/y1 to x2/y2 cell.
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* Negative values represents current screen dimensions
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*/
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void
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fhandler_console::clear_screen (int x1, int y1, int x2, int y2)
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fhandler_console::clear_screen (cltype xc1, cltype yc1, cltype xc2, cltype yc2)
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{
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COORD tlc;
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DWORD done;
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@ -1270,14 +1223,10 @@ fhandler_console::clear_screen (int x1, int y1, int x2, int y2)
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dev_state.fillin_info (get_output_handle ());
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if (x1 < 0)
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x1 = dev_state.info.dwWinSize.X - 1;
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if (y1 < 0)
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y1 = dev_state.info.winBottom;
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if (x2 < 0)
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x2 = dev_state.info.dwWinSize.X - 1;
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if (y2 < 0)
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y2 = dev_state.info.winBottom;
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int x1 = dev_state.info.set_cl_x (xc1);
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int y1 = dev_state.info.set_cl_y (yc1);
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int x2 = dev_state.info.set_cl_x (xc2);
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int y2 = dev_state.info.set_cl_y (yc2);
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num = abs (y1 - y2) * dev_state.info.dwBufferSize.X + abs (x1 - x2) + 1;
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@ -1412,6 +1361,60 @@ bool fhandler_console::write_console (PWCHAR buf, DWORD len, DWORD& done)
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return true;
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}
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/* The following three functions were adapted (i.e., mildly modified) from
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http://stackoverflow.com/questions/14699043/replacement-to-systemcolor */
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/* Split a rectangular region into two smaller rectangles based on the
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largest dimension. */
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static void
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region_split (PCHAR_INFO& buf, COORD& bufsiz, SMALL_RECT& region,
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PCHAR_INFO& buf_b, COORD& bufsiz_b, SMALL_RECT& region_b)
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{
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region_b = region;
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bufsiz_b = bufsiz;
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SHORT half = (1 + region.Bottom - region.Top) / 2;
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region_b.Top += half;
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region.Bottom = (bufsiz.Y = region_b.Top) - 1;
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buf_b = buf + (half * (1 + region.Right));
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bufsiz_b.Y = region_b.Bottom - region_b.Top;
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}
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/* Utility function to figure out the distance between two points. */
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static SHORT
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delta (SHORT first, SHORT second)
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{
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return (second >= first) ? (second - first + 1) : 0;
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}
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/* Subdivide the ReadConsoleInput operation into smaller and smaller chunks as
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needed until it succeeds in reading the entire screen buffer. */
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static BOOL
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ReadConsoleOutputWrapper (HANDLE h, PCHAR_INFO buf, COORD bufsiz,
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SMALL_RECT& region)
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{
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COORD coord = {};
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SHORT width = delta (region.Left, region.Right);
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SHORT height = delta (region.Top, region.Bottom);
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if ((width == 0) || (height == 0))
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return TRUE;
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BOOL success = ReadConsoleOutputW (h, buf, bufsiz, coord, ®ion);
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if (success)
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/* it worked */;
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else if (GetLastError () == ERROR_NOT_ENOUGH_MEMORY && (width * height) > 1)
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{
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PCHAR_INFO buf_b;
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COORD bufsiz_b;
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SMALL_RECT region_b;
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region_split (buf, bufsiz, region, buf_b, bufsiz_b, region_b);
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success = ReadConsoleOutputWrapper (h, buf, bufsiz, region)
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&& ReadConsoleOutputWrapper (h, buf_b, bufsiz_b, region_b);
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}
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return success;
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}
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#define BAK 1
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#define ESC 2
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#define NOR 0
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@ -1628,13 +1631,13 @@ fhandler_console::char_command (char c)
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if (c == 'h') /* save */
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{
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CONSOLE_SCREEN_BUFFER_INFO now;
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COORD cob = { 0, 0 };
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if (!GetConsoleScreenBufferInfo (get_output_handle (), &now))
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break;
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dev_state.savebufsiz.X = now.srWindow.Right - now.srWindow.Left + 1;
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dev_state.savebufsiz.Y = now.srWindow.Bottom - now.srWindow.Top + 1;
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/* Assume starting from 0/0 */
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dev_state.savebufsiz.X = 1 + now.srWindow.Right;
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dev_state.savebufsiz.Y = 1 + now.srWindow.Bottom;
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if (dev_state.savebuf)
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cfree (dev_state.savebuf);
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@ -1643,7 +1646,7 @@ fhandler_console::char_command (char c)
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BOOL res = ReadConsoleOutputWrapper (get_output_handle (),
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dev_state.savebuf,
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dev_state.savebufsiz, cob,
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dev_state.savebufsiz,
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now.srWindow);
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if (!res)
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debug_printf ("ReadConsoleOutputWrapper failed, %E");
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@ -1718,16 +1721,15 @@ fhandler_console::char_command (char c)
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switch (dev_state.args_[0])
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{
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case 0: /* Clear to end of screen */
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cursor_get (&x, &y);
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clear_screen (x, y, -1, -1);
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clear_screen (cl_curr_pos, cl_curr_pos, cl_disp_end, cl_disp_end);
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break;
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case 1: /* Clear from beginning of screen to cursor */
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cursor_get (&x, &y);
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clear_screen (0, 0, x, y);
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clear_screen (cl_disp_beg, cl_disp_beg, cl_curr_pos, cl_curr_pos);
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break;
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case 2: /* Clear screen */
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clear_screen (0, 0, -1, -1);
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cursor_set (true, 0,0);
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clear_screen (cl_disp_beg, cl_disp_beg, cl_disp_end, cl_disp_end);
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cursor_set (true, 0, 0);
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break;
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default:
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goto bad_escape;
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@ -1750,16 +1752,13 @@ fhandler_console::char_command (char c)
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switch (dev_state.args_[0])
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{
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case 0: /* Clear to end of line */
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cursor_get (&x, &y);
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clear_screen (x, y, -1, y);
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clear_screen (cl_curr_pos, cl_curr_pos, cl_disp_end, cl_curr_pos);
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break;
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case 2: /* Clear line */
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cursor_get (&x, &y);
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clear_screen (0, y, -1, y);
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clear_screen (cl_disp_beg, cl_curr_pos, cl_disp_end, cl_curr_pos);
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break;
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case 1: /* Clear from bol to cursor */
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cursor_get (&x, &y);
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clear_screen (0, y, x, y);
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clear_screen (cl_disp_beg, cl_curr_pos, cl_curr_pos, cl_curr_pos);
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break;
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default:
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goto bad_escape;
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@ -2165,7 +2164,7 @@ fhandler_console::write (const void *vsrc, size_t len)
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dev_state.vt100_graphics_mode_G0 = false;
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dev_state.vt100_graphics_mode_G1 = false;
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dev_state.iso_2022_G1 = false;
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clear_screen (0, 0, -1, -1);
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clear_screen (cl_disp_beg, cl_disp_beg, cl_disp_end, cl_disp_end);
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cursor_set (true, 0, 0);
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dev_state.state_ = normal;
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}
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@ -2208,9 +2207,7 @@ fhandler_console::write (const void *vsrc, size_t len)
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dev_state.state_ = gotcommand;
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}
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else
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{
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dev_state.state_ = gotcommand;
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}
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dev_state.state_ = gotcommand;
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break;
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case gotcommand:
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char_command (*src++);
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@ -29,3 +29,6 @@ Bug Fixes
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- The console buffer should no longer be cleared when the resolution of the
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console exceeds some magic threshold.
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Fixes: http://cygwin.com/ml/cygwin/2013-12/threads.html#00406
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- Fix inadvertent clearing of entire console buffer on clear screen.
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See: http://cygwin.com/ml/cygwin/2014-01/msg00011.html
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