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button.c
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/* $TOG: button.c /main/76 1997/07/30 16:56:19 kaleb $ */
/*
* Copyright 1999-2000 by Thomas E. Dickey <[email protected]>
*
* All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization.
*
*
* Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of Digital Equipment
* Corporation not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
*
*
* DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/* $XFree86: xc/programs/xterm/button.c,v 3.47 2000/02/10 18:57:36 dawes Exp $ */
/*
button.c Handles button events in the terminal emulator.
does cut/paste operations, change modes via menu,
passes button events through to some applications.
J. Gettys.
*/
#include <xterm.h>
#include <X11/Xatom.h>
#include <stdio.h>
#ifdef MINIX
#include <X11/Xos.h>
#endif
#include <X11/Xmu/Atoms.h>
#include <X11/Xmu/StdSel.h>
#include <data.h>
#include <error.h>
#include <menu.h>
#include <xcharmouse.h>
#define XTERM_CELL(row,col) getXtermCell(screen, row + screen->topline, col)
/*
* We reserve shift modifier for cut/paste operations. In principle we
* can pass through control and meta modifiers, but in practice, the
* popup menu uses control, and the window manager is likely to use meta,
* so those events are not delivered to SendMousePosition.
*/
#define OurModifiers (ShiftMask | ControlMask | Mod1Mask)
#define AllModifiers (ShiftMask | LockMask | ControlMask | Mod1Mask | \
Mod2Mask | Mod3Mask | Mod4Mask | Mod5Mask)
#define KeyModifiers (event->xbutton.state & OurModifiers)
#define KeyState(x) (((x) & (ShiftMask|ControlMask)) + (((x) & Mod1Mask) ? 2 : 0))
/* adds together the bits:
shift key -> 1
meta key -> 2
control key -> 4 */
#define Coordinate(r,c) ((r) * (term->screen.max_col+1) + (c))
#if OPT_DEC_LOCATOR
static ANSI reply;
#endif
/* Selection/extension variables */
/* Raw char position where the selection started */
static int rawRow, rawCol;
/* Selected area before CHAR, WORD, LINE selectUnit processing */
static int startRRow, startRCol, endRRow, endRCol = 0;
/* Selected area after CHAR, WORD, LINE selectUnit processing */
static int startSRow, startSCol, endSRow, endSCol = 0;
/* Valid rows for selection clipping */
static int firstValidRow, lastValidRow;
/* Start, end of extension */
static int startERow, startECol, endERow, endECol;
/* Saved values of raw selection for extend to restore to */
static int saveStartRRow, saveStartRCol, saveEndRRow, saveEndRCol;
/* Saved value of WORD selection for LINE processing to restore to */
static int saveStartWRow, saveStartWCol;
/* Multi-click handling */
static int numberOfClicks = 0;
static Time lastButtonUpTime = 0;
typedef int SelectUnit;
#define SELECTCHAR 0
#define SELECTWORD 1
#define SELECTLINE 2
#define NSELECTUNITS 3
static SelectUnit selectUnit;
/* Send emacs escape code when done selecting or extending? */
static int replyToEmacs;
static Char *SaveText (TScreen *screen, int row, int scol, int ecol, Char *lp, int *eol);
static int Length (TScreen *screen, int row, int scol, int ecol);
static void ComputeSelect (int startRow, int startCol, int endRow, int endCol, Bool extend);
static void EditorButton (XButtonEvent *event);
static void EndExtend (Widget w, XEvent *event, String *params, Cardinal num_params, Bool use_cursor_loc);
static void ExtendExtend (int row, int col);
static void PointToRowCol (int y, int x, int *r, int *c);
static void ReHiliteText (int frow, int fcol, int trow, int tcol);
static void SaltTextAway (int crow, int ccol, int row, int col, String *params, Cardinal num_params);
static void SelectSet (Widget w, XEvent *event, String *params, Cardinal num_params);
static void SelectionReceived PROTO_XT_SEL_CB_ARGS;
static void StartSelect (int startrow, int startcol);
static void TrackDown (XButtonEvent *event);
static void _OwnSelection (XtermWidget termw, String *selections, Cardinal count);
Boolean SendMousePosition(Widget w, XEvent* event)
{
TScreen *screen;
if (!IsXtermWidget(w))
return False;
screen = &((XtermWidget)w)->screen;
/* If send_mouse_pos mode isn't on, we shouldn't be here */
if (screen->send_mouse_pos == MOUSE_OFF)
return False;
#if OPT_DEC_LOCATOR
if (screen->send_mouse_pos == DEC_LOCATOR) {
return( SendLocatorPosition( w, event ) );
}
#endif /* OPT_DEC_LOCATOR */
/* Make sure the event is an appropriate type */
if ((screen->send_mouse_pos != BTN_EVENT_MOUSE)
&& (screen->send_mouse_pos != ANY_EVENT_MOUSE)
&& event->type != ButtonPress
&& event->type != ButtonRelease)
return False;
switch (screen->send_mouse_pos) {
case X10_MOUSE: /* X10 compatibility sequences */
if (KeyModifiers == 0) {
if (event->type == ButtonPress)
EditorButton((XButtonEvent *)event);
return True;
}
return False;
case VT200_HIGHLIGHT_MOUSE: /* DEC vt200 hilite tracking */
if ( event->type == ButtonPress &&
KeyModifiers == 0 &&
event->xbutton.button == Button1 ) {
TrackDown((XButtonEvent *)event);
return True;
}
if (KeyModifiers == 0 || KeyModifiers == ControlMask) {
EditorButton((XButtonEvent *)event);
return True;
}
return False;
case VT200_MOUSE: /* DEC vt200 compatible */
/* xterm extension for motion reporting. June 1998 */
/* EditorButton() will distinguish between the modes */
case BTN_EVENT_MOUSE:
case ANY_EVENT_MOUSE:
if (KeyModifiers == 0 || KeyModifiers == ControlMask) {
EditorButton((XButtonEvent *)event);
return True;
}
return False;
default:
return False;
}
}
#if OPT_DEC_LOCATOR
#define LocatorCoords( row, col, x, y, oor ) \
if( screen->locator_pixels ) { \
(oor)=FALSE; (row) = (y)+1; (col) = (x)+1; \
/* Limit to screen dimensions */ \
if ((row) < 1) (row) = 1,(oor)=TRUE; \
else if ((row) > screen->border*2+Height(screen)) \
(row) = screen->border*2+Height(screen),(oor)=TRUE; \
if ((col) < 1) (col) = 1,(oor)=TRUE; \
else if ((col) > OriginX(screen)*2+Width(screen)) \
(col) = OriginX(screen)*2+Width(screen),(oor)=TRUE; \
} else { \
(oor)=FALSE; \
/* Compute character position of mouse pointer */ \
(row) = ((y) - screen->border) / FontHeight(screen); \
(col) = ((x) - OriginX(screen)) / FontWidth(screen); \
/* Limit to screen dimensions */ \
if ((row) < 0) (row) = 0,(oor)=TRUE; \
else if ((row) > screen->max_row) \
(row) = screen->max_row,(oor)=TRUE; \
if ((col) < 0) (col) = 0,(oor)=TRUE; \
else if ((col) > screen->max_col) \
(col) = screen->max_col,(oor)=TRUE; \
(row)++; (col)++; \
}
#define MotionOff( s, t ) { \
(s)->event_mask |= ButtonMotionMask; \
(s)->event_mask &= ~PointerMotionMask; \
XSelectInput(XtDisplay((t)), XtWindow((t)), (s)->event_mask); }
#define MotionOn( s, t ) { \
(s)->event_mask &= ~ButtonMotionMask; \
(s)->event_mask |= PointerMotionMask; \
XSelectInput(XtDisplay((t)), XtWindow((t)), (s)->event_mask); }
Boolean
SendLocatorPosition(Widget w, XEvent* event)
{
TScreen *screen = &((XtermWidget)w)->screen;
int row, col;
Boolean oor;
int button;
int state;
/* Make sure the event is an appropriate type */
if ((event->type != ButtonPress &&
event->type != ButtonRelease &&
!screen->loc_filter) ||
(KeyModifiers != 0 && KeyModifiers != ControlMask))
return( False );
if ((event->type == ButtonPress &&
!(screen->locator_events & LOC_BTNS_DN)) ||
(event->type == ButtonRelease &&
!(screen->locator_events & LOC_BTNS_UP)))
return( True );
if( event->type == MotionNotify ) {
CheckLocatorPosition( w, event );
return( True );
}
/* get button # */
button = event->xbutton.button - 1;
LocatorCoords( row, col, event->xbutton.x, event->xbutton.y, oor );
/*
* DECterm mouse:
*
* ESCAPE '[' event ; mask ; row ; column '&' 'w'
*/
reply.a_type = CSI;
if( oor) {
reply.a_nparam = 1;
reply.a_param[0] = 0; /* Event - 0 = locator unavailable */
reply.a_inters = '&';
reply.a_final = 'w';
unparseseq(&reply, screen->respond);
if( screen->locator_reset ) {
MotionOff( screen, term );
screen->send_mouse_pos = MOUSE_OFF;
}
return( True );
}
/*
* event:
* 1 no buttons
* 2 left button down
* 3 left button up
* 4 middle button down
* 5 middle button up
* 6 right button down
* 7 right button up
* 8 M4 down
* 9 M4 up
*/
reply.a_nparam = 4;
switch(event->type)
{
case ButtonPress:
reply.a_param[0] = 2 + (button<<1);
break;
case ButtonRelease:
reply.a_param[0] = 3 + (button<<1);
break;
default:
return( True );
}
/*
* mask:
* bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
* M4 down left down middle down right down
*
* Notice that Button1 (left) and Button3 (right) are swapped in the mask.
* Also, mask should be the state after the button press/release,
* X provides the state not including the button press/release.
*/
state = (event->xbutton.state & (Button1Mask | Button2Mask | Button3Mask | Button4Mask)) >> 8;
state ^= 1 << button; /* update mask to "after" state */
state = (state & ~(4|1)) | ((state&1)?4:0) | ((state&4)?1:0); /* swap Button1 & Button3 */
reply.a_param[1] = state;
reply.a_param[2] = row;
reply.a_param[3] = col;
reply.a_inters = '&';
reply.a_final = 'w';
unparseseq(&reply, screen->respond);
if( screen->locator_reset ) {
MotionOff( screen, term );
screen->send_mouse_pos = MOUSE_OFF;
}
/*
* DECterm turns the Locator off if a button is pressed while a filter rectangle
* is active. This might be a bug, but I don't know, so I'll emulate it anyways.
*/
if( screen->loc_filter ) {
screen->send_mouse_pos = MOUSE_OFF;
screen->loc_filter = FALSE;
screen->locator_events = 0;
MotionOff( screen, term );
}
return( True );
}
/*
* mask:
* bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
* M4 down left down middle down right down
*
* Button1 (left) and Button3 (right) are swapped in the mask relative to X.
*/
#define ButtonState(state, mask) \
{ (state) = ((mask) & (Button1Mask | Button2Mask | Button3Mask | Button4Mask)) >> 8; \
/* swap Button1 & Button3 */ \
(state) = ((state) & ~(4|1)) | (((state)&1)?4:0) | (((state)&4)?1:0); \
}
void
GetLocatorPosition(XtermWidget w)
{
TScreen *screen = &w->screen;
Window root, child;
int rx, ry, x, y;
unsigned int mask;
int row = 0, col = 0;
Boolean oor = FALSE;
Bool ret = FALSE;
int state;
/*
* DECterm turns the Locator off if the position is requested while a filter rectangle
* is active. This might be a bug, but I don't know, so I'll emulate it anyways.
*/
if( screen->loc_filter ) {
screen->send_mouse_pos = MOUSE_OFF;
screen->loc_filter = FALSE;
screen->locator_events = 0;
MotionOff( screen, term );
}
reply.a_type = CSI;
if (screen->send_mouse_pos == DEC_LOCATOR) {
ret = XQueryPointer( screen->display, VWindow(screen), &root,
&child, &rx, &ry, &x, &y, &mask );
if (ret) {
LocatorCoords( row, col, x, y, oor );
}
}
if( ret == FALSE || oor )
{
reply.a_nparam = 1;
reply.a_param[0] = 0; /* Event - 0 = locator unavailable */
reply.a_inters = '&';
reply.a_final = 'w';
unparseseq(&reply, screen->respond);
if( screen->locator_reset ) {
MotionOff( screen, term );
screen->send_mouse_pos = MOUSE_OFF;
}
return;
}
ButtonState( state, mask );
reply.a_nparam = 4;
reply.a_param[0] = 1; /* Event - 1 = response to locator request */
reply.a_param[1] = state;
reply.a_param[2] = row;
reply.a_param[3] = col;
reply.a_inters = '&';
reply.a_final = 'w';
unparseseq(&reply, screen->respond);
if( screen->locator_reset ) {
MotionOff( screen, term );
screen->send_mouse_pos = MOUSE_OFF;
}
}
void
InitLocatorFilter( XtermWidget w )
{
TScreen *screen = &w->screen;
Window root, child;
int rx, ry, x, y;
unsigned int mask;
int row, col;
Boolean oor;
Bool ret;
int state;
ret = XQueryPointer( screen->display, VWindow(screen),
&root, &child, &rx, &ry, &x, &y, &mask );
if (ret) {
LocatorCoords( row, col, x, y, oor );
}
if( ret == FALSE || oor )
{
/* Locator is unavailable */
if( screen->loc_filter_top != LOC_FILTER_POS ||
screen->loc_filter_left != LOC_FILTER_POS ||
screen->loc_filter_bottom != LOC_FILTER_POS ||
screen->loc_filter_right != LOC_FILTER_POS )
{
/*
* If any explicit coordinates were received,
* report immediately with no coordinates.
*/
reply.a_type = CSI;
reply.a_nparam = 1;
reply.a_param[0] = 0; /* Event - 0 = locator unavailable */
reply.a_inters = '&';
reply.a_final = 'w';
unparseseq(&reply, screen->respond);
if( screen->locator_reset ) {
MotionOff( screen, term );
screen->send_mouse_pos = MOUSE_OFF;
}
} else {
/*
* No explicit coordinates were received, and the pointer is
* unavailable. Report when the pointer re-enters the window.
*/
screen->loc_filter = TRUE;
MotionOn( screen, term );
}
return;
}
/*
* Adjust rectangle coordinates:
* 1. Replace "LOC_FILTER_POS" with current coordinates
* 2. Limit coordinates to screen size
* 3. make sure top and left are less than bottom and right, resp.
*/
if( screen->locator_pixels ) {
rx = OriginX(screen)*2+Width(screen);
ry = screen->border*2+Height(screen);
} else {
rx = screen->max_col;
ry = screen->max_row;
}
#define Adjust( coord, def, max ) \
if( (coord) == LOC_FILTER_POS ) (coord) = (def); \
else if ((coord) < 1) (coord) = 1; \
else if ((coord) > (max)) (coord) = (max)
Adjust( screen->loc_filter_top, row, ry );
Adjust( screen->loc_filter_left, col, rx );
Adjust( screen->loc_filter_bottom, row, ry );
Adjust( screen->loc_filter_right, col, rx );
if( screen->loc_filter_top > screen->loc_filter_bottom ) {
ry = screen->loc_filter_top;
screen->loc_filter_top = screen->loc_filter_bottom;
screen->loc_filter_bottom = ry;
}
if( screen->loc_filter_left > screen->loc_filter_right ) {
rx = screen->loc_filter_left;
screen->loc_filter_left = screen->loc_filter_right;
screen->loc_filter_right = rx;
}
if( (col < screen->loc_filter_left) ||
(col > screen->loc_filter_right) ||
(row < screen->loc_filter_top) ||
(row > screen->loc_filter_bottom) )
{
/* Pointer is already outside the rectangle - report immediately */
ButtonState( state, mask );
reply.a_type = CSI;
reply.a_nparam = 4;
reply.a_param[0] = 10; /* Event - 10 = locator outside filter */
reply.a_param[1] = state;
reply.a_param[2] = row;
reply.a_param[3] = col;
reply.a_inters = '&';
reply.a_final = 'w';
unparseseq(&reply, screen->respond);
if( screen->locator_reset ) {
MotionOff( screen, term );
screen->send_mouse_pos = MOUSE_OFF;
}
return;
}
/*
* Rectangle is set up. Allow pointer tracking
* to detect if the mouse leaves the rectangle.
*/
screen->loc_filter = TRUE;
MotionOn( screen, term );
}
void
CheckLocatorPosition( Widget w, XEvent *event )
{
TScreen *screen = &((XtermWidget)w)->screen;
int row, col;
Boolean oor;
int state;
LocatorCoords( row, col, event->xbutton.x, event->xbutton.y, oor );
/*
* Send report if the pointer left the filter rectangle, if
* the pointer left the window, or if the filter rectangle
* had no coordinates and the pointer re-entered the window.
*/
if (oor || (screen->loc_filter_top == LOC_FILTER_POS) ||
(col < screen->loc_filter_left) ||
(col > screen->loc_filter_right) ||
(row < screen->loc_filter_top) ||
(row > screen->loc_filter_bottom))
{
/* Filter triggered - disable it */
screen->loc_filter = FALSE;
MotionOff( screen, term );
reply.a_type = CSI;
if (oor) {
reply.a_nparam = 1;
reply.a_param[0] = 0; /* Event - 0 = locator unavailable */
} else {
ButtonState( state, event->xbutton.state );
reply.a_nparam = 4;
reply.a_param[0] = 10; /* Event - 10 = locator outside filter */
reply.a_param[1] = state;
reply.a_param[2] = row;
reply.a_param[3] = col;
}
reply.a_inters = '&';
reply.a_final = 'w';
unparseseq(&reply, screen->respond);
if( screen->locator_reset ) {
MotionOff( screen, term );
screen->send_mouse_pos = MOUSE_OFF;
}
}
}
#endif /* OPT_DEC_LOCATOR */
void
DiredButton(
Widget w GCC_UNUSED,
XEvent *event, /* must be XButtonEvent */
String *params GCC_UNUSED, /* selections */
Cardinal *num_params GCC_UNUSED)
{ /* ^XM-G<line+' '><col+' '> */
register TScreen *screen = &term->screen;
Char Line[ 6 ];
register unsigned line, col;
if (event->type == ButtonPress || event->type == ButtonRelease) {
line = ( event->xbutton.y - screen->border ) / FontHeight( screen );
col = ( event->xbutton.x - OriginX(screen)) / FontWidth( screen );
Line[0] = CONTROL('X');
Line[1] = ESC;
Line[2] = 'G';
Line[3] = ' ' + col;
Line[4] = ' ' + line;
v_write(screen->respond, Line, 5 );
}
}
void
ViButton(
Widget w GCC_UNUSED,
XEvent *event, /* must be XButtonEvent */
String *params GCC_UNUSED, /* selections */
Cardinal *num_params GCC_UNUSED)
{ /* ^XM-G<line+' '><col+' '> */
register TScreen *screen = &term->screen;
int pty = screen->respond;
Char Line[ 6 ];
register int line;
if (event->type == ButtonPress || event->type == ButtonRelease) {
line = screen->cur_row -
(( event->xbutton.y - screen->border ) / FontHeight( screen ));
if (line != 0) {
Line[0] = ESC; /* force an exit from insert-mode */
v_write(pty, Line, 1 );
if ( line < 0 ) {
line = -line;
Line[0] = CONTROL('n');
} else {
Line[0] = CONTROL('p');
}
while ( --line >= 0 )
v_write(pty, Line, 1 );
}
}
}
/*
* This function handles button-motion events
*/
/*ARGSUSED*/
void HandleSelectExtend(
Widget w,
XEvent *event, /* must be XMotionEvent */
String *params GCC_UNUSED,
Cardinal *num_params GCC_UNUSED)
{
register TScreen *screen;
int row, col;
if (!IsXtermWidget(w))
return;
screen = &((XtermWidget)w)->screen;
screen->selection_time = event->xmotion.time;
switch (eventMode) {
/* If not in one of the DEC mouse-reporting modes */
case LEFTEXTENSION :
case RIGHTEXTENSION :
PointToRowCol (event->xmotion.y, event->xmotion.x,
&row, &col);
ExtendExtend (row, col);
break;
/* If in motion reporting mode, send mouse position to
character process as a key sequence \E[M... */
case NORMAL :
/* will get here if send_mouse_pos != MOUSE_OFF */
if ( screen->send_mouse_pos == BTN_EVENT_MOUSE
|| screen->send_mouse_pos == ANY_EVENT_MOUSE )
SendMousePosition(w,event);
break;
}
}
static void do_select_end (
Widget w,
XEvent *event, /* must be XButtonEvent */
String *params, /* selections */
Cardinal *num_params,
Bool use_cursor_loc)
{
if (!IsXtermWidget(w))
return;
((XtermWidget)w)->screen.selection_time = event->xbutton.time;
switch (eventMode) {
case NORMAL :
(void) SendMousePosition(w, event);
break;
case LEFTEXTENSION :
case RIGHTEXTENSION :
EndExtend(w, event, params, *num_params, use_cursor_loc);
break;
}
}
void HandleSelectEnd(
Widget w,
XEvent *event, /* must be XButtonEvent */
String *params, /* selections */
Cardinal *num_params)
{
do_select_end (w, event, params, num_params, False);
}
void HandleKeyboardSelectEnd(
Widget w,
XEvent *event, /* must be XButtonEvent */
String *params, /* selections */
Cardinal *num_params)
{
do_select_end (w, event, params, num_params, True);
}
#if OPT_WIDE_CHARS
static Atom XA_UTF8_STRING(Display *dpy)
{
static AtomPtr p = NULL;
if(p == NULL)
p = XmuMakeAtom("UTF8_STRING");
return XmuInternAtom(dpy, p);
}
#endif
struct _SelectionList {
String *params;
Cardinal count;
Bool utf8_failed; /* only used for UTF-8, but a nuisance to ifdef */
Time time;
};
/* convert a UTF-8 string to Latin-1, replacing non Latin-1 characters
* by `#'. */
#if OPT_WIDE_CHARS
static XtPointer
UTF8toLatin1(Char *s, int len, unsigned long *result)
{
static Char *buffer;
static size_t used;
Char *p = s;
Char *q;
if (used == 0) {
buffer = (Char*)XtMalloc(used = len);
} else if (len > (int) used) {
buffer = (Char*)XtRealloc((char*)buffer, used = len);
}
q = buffer;
/* We're assuming that the xterm widget never contains Unicode
control characters. */
while (p < s + len) {
if ((*p & 0x80) == 0) {
*q++ = *p++;
} else if ((*p & 0x7C) == 0x40 && p < s + len - 1) {
*q++ = ((*p & 0x03) << 6) | (p[1] & 0x3F);
p += 2;
} else if ((*p & 0x60) == 0x40) {
*q++ = '#';
p += 2;
} else if ((*p & 0x50) == 0x40) {
*q++ = '#';
p += 3;
} else { /* this cannot happen */
*q++ = '#';
p++;
}
}
*result = q - buffer;
return (XtPointer)buffer;
}
/* Convert a Latin-1 string to UTF-8 */
static int
Latin1toUTF8(Char *t, Char *s, int len)
{
Char *p = s;
Char *q = t;
while (p < s + len) {
if ((*p & 0x80) == 0) {
*q++ = *p++;
} else {
*q++ = 0xC0 | ((*p >> 6) & 0x3);
*q++ = 0x80 | (*p & 0x3F);
p++;
}
}
return q - t;
}
/* Eliminate all control characters from a UTF-8 string, doing
something reasonable with PS and LS */
static int
filterUTF8(Char *t, Char *s, int len)
{
Char *p=s;
Char *q=t;
unsigned codepoint;
int size;
while (p < (s + len) && q < (t + len)) {
if ((*p & 0x80) == 0) {
codepoint = *p & 0x7F;
size = 1;
} else if ((*p & 0x60) == 0x40 && p < s + len - 1) {
codepoint = ((p[0] & 0x1F) << 6) | (p[1] & 0x3F);
size = 2;
} else if ((*p & 0x70) == 0x60 && p < s + len - 2) {
codepoint = ((p[0] & 0x0F) << 12)
| ((p[1] & 0x3F) << 6)
| (p[2] & 0x3F);
size = 3;
} else if ((*p & 0x78) == 0x70 && p < s + len - 3) {
p += 4; /* eliminate surrogates */
continue;
} else if ((*p & 0x7C) == 0x78 && p < s + len - 4) {
p += 5;
continue;
} else if ((*p & 0x7E) == 0x7C && p < s + len - 5) {
p += 6;
continue;
} else { /* wrong UTF-8? Silently discard. */
p++;
continue;
}
if(codepoint == 0x2028) {
/* line separator -- replace by NL*/
p += size;
*q++ = 0x0A;
} else if (codepoint == 0x2029) {
/* paragraph separator -- replace by NL NL */
p += size;
*q++ = 0x0A;
if (q < t + len)
*q++ = 0x0A;
} else if (codepoint >= 0x202A && codepoint <= 0x202E) {
/* ignore Unicode control characters; surrogates have already
been eliminated */
p += size;
} else {
/* just copy the UTF-8 */
while (size--)
*q++ = *p++;
}
}
return q - t;
}
#endif /* OPT_WIDE_CHARS */
static void _GetSelection(
Widget w,
Time ev_time,
String *params, /* selections in precedence order */
Cardinal num_params,
Bool utf8_failed GCC_UNUSED) /* already tried UTF-8 */
{
TScreen *screen;
Atom selection;
int cutbuffer;
if (!IsXtermWidget(w))
return;
screen = &((XtermWidget)w)->screen;
XmuInternStrings(XtDisplay(w), params, (Cardinal)1, &selection);
switch (selection) {
case XA_CUT_BUFFER0: cutbuffer = 0; break;
case XA_CUT_BUFFER1: cutbuffer = 1; break;
case XA_CUT_BUFFER2: cutbuffer = 2; break;
case XA_CUT_BUFFER3: cutbuffer = 3; break;
case XA_CUT_BUFFER4: cutbuffer = 4; break;
case XA_CUT_BUFFER5: cutbuffer = 5; break;
case XA_CUT_BUFFER6: cutbuffer = 6; break;
case XA_CUT_BUFFER7: cutbuffer = 7; break;
default: cutbuffer = -1;
}
TRACE(("Cutbuffer: %d, utf8_failed: %d\n", cutbuffer, utf8_failed));
if (cutbuffer >= 0) {
int inbytes;
unsigned long nbytes;
int fmt8 = 8;
Atom type = XA_STRING;
char *line = XFetchBuffer(XtDisplay(w), &inbytes, cutbuffer);
nbytes = (unsigned long) inbytes;
if (nbytes > 0)
SelectionReceived(w, NULL, &selection, &type, (XtPointer)line,
&nbytes, &fmt8);
else if (num_params > 1)
_GetSelection(w, ev_time, params+1, num_params-1, False);
} else {
struct _SelectionList* list;
#if OPT_WIDE_CHARS
if (!screen->wide_chars || utf8_failed) {
params++;
num_params--;
utf8_failed = False;
} else {
utf8_failed = True;
}
#else
params++;
num_params--;
#endif
if (num_params) {
list = XtNew(struct _SelectionList);
list->params = params;
list->count = num_params;
#if OPT_WIDE_CHARS
list->utf8_failed = utf8_failed;
#endif
list->time = ev_time;
} else list = NULL;
XtGetSelectionValue(w, selection,
#if OPT_WIDE_CHARS
(screen->wide_chars && utf8_failed) ?
XA_UTF8_STRING(XtDisplay(w)) :
#endif
XA_STRING,
SelectionReceived,
(XtPointer)list, ev_time);
}
}
#if OPT_TRACE && OPT_WIDE_CHARS
static void GettingSelection(char *tag, char *line, int len)
{
char *cp;
Trace("Getting %s\n", tag);
for (cp = line; cp < line + len; cp++)
Trace("%c\n", *cp);
}
#else
#define GettingSelection(tag,line,len) /* nothing */
#endif
/* SelectionReceived: stuff received selection text into pty */
/* ARGSUSED */
static void SelectionReceived(
Widget w,
XtPointer client_data,
Atom *selection GCC_UNUSED,