forked from b4winckler/macvim
/
gui_beval.c
1341 lines (1204 loc) · 33.3 KB
/
gui_beval.c
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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
* Visual Workshop integration by Gordon Prieur
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
#include "vim.h"
#if defined(FEAT_BEVAL) || defined(PROTO)
/*
* Common code, invoked when the mouse is resting for a moment.
*/
void
general_beval_cb(beval, state)
BalloonEval *beval;
int state UNUSED;
{
#ifdef FEAT_EVAL
win_T *wp;
int col;
int use_sandbox;
linenr_T lnum;
char_u *text;
static char_u *result = NULL;
long winnr = 0;
char_u *bexpr;
buf_T *save_curbuf;
# ifdef FEAT_WINDOWS
win_T *cw;
# endif
#endif
static int recursive = FALSE;
/* Don't do anything when 'ballooneval' is off, messages scrolled the
* windows up or we have no beval area. */
if (!p_beval || balloonEval == NULL || msg_scrolled > 0)
return;
/* Don't do this recursively. Happens when the expression evaluation
* takes a long time and invokes something that checks for CTRL-C typed. */
if (recursive)
return;
recursive = TRUE;
#ifdef FEAT_EVAL
if (get_beval_info(balloonEval, TRUE, &wp, &lnum, &text, &col) == OK)
{
bexpr = (*wp->w_buffer->b_p_bexpr == NUL) ? p_bexpr
: wp->w_buffer->b_p_bexpr;
if (*bexpr != NUL)
{
# ifdef FEAT_WINDOWS
/* Convert window pointer to number. */
for (cw = firstwin; cw != wp; cw = cw->w_next)
++winnr;
# endif
set_vim_var_nr(VV_BEVAL_BUFNR, (long)wp->w_buffer->b_fnum);
set_vim_var_nr(VV_BEVAL_WINNR, winnr);
set_vim_var_nr(VV_BEVAL_LNUM, (long)lnum);
set_vim_var_nr(VV_BEVAL_COL, (long)(col + 1));
set_vim_var_string(VV_BEVAL_TEXT, text, -1);
vim_free(text);
/*
* Temporarily change the curbuf, so that we can determine whether
* the buffer-local balloonexpr option was set insecurely.
*/
save_curbuf = curbuf;
curbuf = wp->w_buffer;
use_sandbox = was_set_insecurely((char_u *)"balloonexpr",
*curbuf->b_p_bexpr == NUL ? 0 : OPT_LOCAL);
curbuf = save_curbuf;
if (use_sandbox)
++sandbox;
++textlock;
vim_free(result);
result = eval_to_string(bexpr, NULL, TRUE);
if (use_sandbox)
--sandbox;
--textlock;
set_vim_var_string(VV_BEVAL_TEXT, NULL, -1);
if (result != NULL && result[0] != NUL)
{
gui_mch_post_balloon(beval, result);
recursive = FALSE;
return;
}
}
}
#endif
#ifdef FEAT_NETBEANS_INTG
if (bevalServers & BEVAL_NETBEANS)
netbeans_beval_cb(beval, state);
#endif
#ifdef FEAT_SUN_WORKSHOP
if (bevalServers & BEVAL_WORKSHOP)
workshop_beval_cb(beval, state);
#endif
recursive = FALSE;
}
/* on Win32 and MacVim only get_beval_info() is required */
#if !(defined(FEAT_GUI_W32) || defined(FEAT_GUI_MACVIM)) || defined(PROTO)
#ifdef FEAT_GUI_GTK
# include <gdk/gdkkeysyms.h>
# include <gtk/gtk.h>
#else
# include <X11/keysym.h>
# ifdef FEAT_GUI_MOTIF
# include <Xm/PushB.h>
# include <Xm/Separator.h>
# include <Xm/List.h>
# include <Xm/Label.h>
# include <Xm/AtomMgr.h>
# include <Xm/Protocols.h>
# else
/* Assume Athena */
# include <X11/Shell.h>
# ifdef FEAT_GUI_NEXTAW
# include <X11/neXtaw/Label.h>
# else
# include <X11/Xaw/Label.h>
# endif
# endif
#endif
#include "gui_beval.h"
#ifndef FEAT_GUI_GTK
extern Widget vimShell;
/*
* Currently, we assume that there can be only one BalloonEval showing
* on-screen at any given moment. This variable will hold the currently
* showing BalloonEval or NULL if none is showing.
*/
static BalloonEval *current_beval = NULL;
#endif
#ifdef FEAT_GUI_GTK
static void addEventHandler __ARGS((GtkWidget *, BalloonEval *));
static void removeEventHandler __ARGS((BalloonEval *));
static gint target_event_cb __ARGS((GtkWidget *, GdkEvent *, gpointer));
static gint mainwin_event_cb __ARGS((GtkWidget *, GdkEvent *, gpointer));
static void pointer_event __ARGS((BalloonEval *, int, int, unsigned));
static void key_event __ARGS((BalloonEval *, unsigned, int));
static gint timeout_cb __ARGS((gpointer));
static gint balloon_expose_event_cb __ARGS((GtkWidget *, GdkEventExpose *, gpointer));
#else
static void addEventHandler __ARGS((Widget, BalloonEval *));
static void removeEventHandler __ARGS((BalloonEval *));
static void pointerEventEH __ARGS((Widget, XtPointer, XEvent *, Boolean *));
static void pointerEvent __ARGS((BalloonEval *, XEvent *));
static void timerRoutine __ARGS((XtPointer, XtIntervalId *));
#endif
static void cancelBalloon __ARGS((BalloonEval *));
static void requestBalloon __ARGS((BalloonEval *));
static void drawBalloon __ARGS((BalloonEval *));
static void undrawBalloon __ARGS((BalloonEval *beval));
static void createBalloonEvalWindow __ARGS((BalloonEval *));
/*
* Create a balloon-evaluation area for a Widget.
* There can be either a "mesg" for a fixed string or "mesgCB" to generate a
* message by calling this callback function.
* When "mesg" is not NULL it must remain valid for as long as the balloon is
* used. It is not freed here.
* Returns a pointer to the resulting object (NULL when out of memory).
*/
BalloonEval *
gui_mch_create_beval_area(target, mesg, mesgCB, clientData)
void *target;
char_u *mesg;
void (*mesgCB)__ARGS((BalloonEval *, int));
void *clientData;
{
#ifndef FEAT_GUI_GTK
char *display_name; /* get from gui.dpy */
int screen_num;
char *p;
#endif
BalloonEval *beval;
if (mesg != NULL && mesgCB != NULL)
{
EMSG(_("E232: Cannot create BalloonEval with both message and callback"));
return NULL;
}
beval = (BalloonEval *)alloc(sizeof(BalloonEval));
if (beval != NULL)
{
#ifdef FEAT_GUI_GTK
beval->target = GTK_WIDGET(target);
beval->balloonShell = NULL;
beval->timerID = 0;
#else
beval->target = (Widget)target;
beval->balloonShell = NULL;
beval->timerID = (XtIntervalId)NULL;
beval->appContext = XtWidgetToApplicationContext((Widget)target);
#endif
beval->showState = ShS_NEUTRAL;
beval->x = 0;
beval->y = 0;
beval->msg = mesg;
beval->msgCB = mesgCB;
beval->clientData = clientData;
/*
* Set up event handler which will keep its eyes on the pointer,
* and when the pointer rests in a certain spot for a given time
* interval, show the beval.
*/
addEventHandler(beval->target, beval);
createBalloonEvalWindow(beval);
#ifndef FEAT_GUI_GTK
/*
* Now create and save the screen width and height. Used in drawing.
*/
display_name = DisplayString(gui.dpy);
p = strrchr(display_name, '.');
if (p != NULL)
screen_num = atoi(++p);
else
screen_num = 0;
beval->screen_width = DisplayWidth(gui.dpy, screen_num);
beval->screen_height = DisplayHeight(gui.dpy, screen_num);
#endif
}
return beval;
}
#if defined(FEAT_BEVAL_TIP) || defined(PROTO)
/*
* Destroy a balloon-eval and free its associated memory.
*/
void
gui_mch_destroy_beval_area(beval)
BalloonEval *beval;
{
cancelBalloon(beval);
removeEventHandler(beval);
/* Children will automatically be destroyed */
# ifdef FEAT_GUI_GTK
gtk_widget_destroy(beval->balloonShell);
# else
XtDestroyWidget(beval->balloonShell);
# endif
vim_free(beval);
}
#endif
void
gui_mch_enable_beval_area(beval)
BalloonEval *beval;
{
if (beval != NULL)
addEventHandler(beval->target, beval);
}
void
gui_mch_disable_beval_area(beval)
BalloonEval *beval;
{
if (beval != NULL)
removeEventHandler(beval);
}
#if defined(FEAT_BEVAL_TIP) || defined(PROTO)
/*
* This function returns the BalloonEval * associated with the currently
* displayed tooltip. Returns NULL if there is no tooltip currently showing.
*
* Assumption: Only one tooltip can be shown at a time.
*/
BalloonEval *
gui_mch_currently_showing_beval()
{
return current_beval;
}
#endif
#endif /* !(FEAT_GUI_W32 || FEAT_GUI_MACVIM) */
#if defined(FEAT_SUN_WORKSHOP) || defined(FEAT_NETBEANS_INTG) \
|| defined(FEAT_EVAL) || defined(PROTO)
/*
* Get the text and position to be evaluated for "beval".
* If "getword" is true the returned text is not the whole line but the
* relevant word in allocated memory.
* Returns OK or FAIL.
*/
int
get_beval_info(beval, getword, winp, lnump, textp, colp)
BalloonEval *beval;
int getword;
win_T **winp;
linenr_T *lnump;
char_u **textp;
int *colp;
{
win_T *wp;
int row, col;
char_u *lbuf;
linenr_T lnum;
*textp = NULL;
row = Y_2_ROW(beval->y);
col = X_2_COL(beval->x);
#ifdef FEAT_WINDOWS
wp = mouse_find_win(&row, &col);
#else
wp = firstwin;
#endif
if (wp != NULL && row < wp->w_height && col < W_WIDTH(wp))
{
/* Found a window and the cursor is in the text. Now find the line
* number. */
if (!mouse_comp_pos(wp, &row, &col, &lnum))
{
/* Not past end of the file. */
lbuf = ml_get_buf(wp->w_buffer, lnum, FALSE);
if (col <= win_linetabsize(wp, lbuf, (colnr_T)MAXCOL))
{
/* Not past end of line. */
if (getword)
{
/* For Netbeans we get the relevant part of the line
* instead of the whole line. */
int len;
pos_T *spos = NULL, *epos = NULL;
if (VIsual_active)
{
if (lt(VIsual, curwin->w_cursor))
{
spos = &VIsual;
epos = &curwin->w_cursor;
}
else
{
spos = &curwin->w_cursor;
epos = &VIsual;
}
}
col = vcol2col(wp, lnum, col) - 1;
if (VIsual_active
&& wp->w_buffer == curwin->w_buffer
&& (lnum == spos->lnum
? col >= (int)spos->col
: lnum > spos->lnum)
&& (lnum == epos->lnum
? col <= (int)epos->col
: lnum < epos->lnum))
{
/* Visual mode and pointing to the line with the
* Visual selection: return selected text, with a
* maximum of one line. */
if (spos->lnum != epos->lnum || spos->col == epos->col)
return FAIL;
lbuf = ml_get_buf(curwin->w_buffer, VIsual.lnum, FALSE);
lbuf = vim_strnsave(lbuf + spos->col,
epos->col - spos->col + (*p_sel != 'e'));
lnum = spos->lnum;
col = spos->col;
}
else
{
/* Find the word under the cursor. */
++emsg_off;
len = find_ident_at_pos(wp, lnum, (colnr_T)col, &lbuf,
FIND_IDENT + FIND_STRING + FIND_EVAL);
--emsg_off;
if (len == 0)
return FAIL;
lbuf = vim_strnsave(lbuf, len);
}
}
*winp = wp;
*lnump = lnum;
*textp = lbuf;
*colp = col;
beval->ts = wp->w_buffer->b_p_ts;
return OK;
}
}
}
return FAIL;
}
# if !(defined(FEAT_GUI_W32) || defined(FEAT_GUI_MACVIM)) || defined(PROTO)
/*
* Show a balloon with "mesg".
*/
void
gui_mch_post_balloon(beval, mesg)
BalloonEval *beval;
char_u *mesg;
{
beval->msg = mesg;
if (mesg != NULL)
drawBalloon(beval);
else
undrawBalloon(beval);
}
# endif /* FEAT_GUI_W32 || FEAT_GUI_MACVIM */
#endif /* FEAT_SUN_WORKSHOP || FEAT_NETBEANS_INTG || PROTO */
#if !(defined(FEAT_GUI_W32) || defined(FEAT_GUI_MACVIM)) || defined(PROTO)
#if defined(FEAT_BEVAL_TIP) || defined(PROTO)
/*
* Hide the given balloon.
*/
void
gui_mch_unpost_balloon(beval)
BalloonEval *beval;
{
undrawBalloon(beval);
}
#endif
#ifdef FEAT_GUI_GTK
/*
* We can unconditionally use ANSI-style prototypes here since
* GTK+ requires an ANSI C compiler anyway.
*/
static void
addEventHandler(GtkWidget *target, BalloonEval *beval)
{
/*
* Connect to the generic "event" signal instead of the individual
* signals for each event type, because the former is emitted earlier.
* This allows us to catch events independently of the signal handlers
* in gui_gtk_x11.c.
*/
/* Should use GTK_OBJECT() here, but that causes a lint warning... */
gtk_signal_connect((GtkObject*)(target), "event",
GTK_SIGNAL_FUNC(target_event_cb),
beval);
/*
* Nasty: Key press events go to the main window thus the drawing area
* will never see them. This means we have to connect to the main window
* as well in order to catch those events.
*/
if (gtk_socket_id == 0 && gui.mainwin != NULL
&& gtk_widget_is_ancestor(target, gui.mainwin))
{
gtk_signal_connect((GtkObject*)(gui.mainwin), "event",
GTK_SIGNAL_FUNC(mainwin_event_cb),
beval);
}
}
static void
removeEventHandler(BalloonEval *beval)
{
/* LINTED: avoid warning: dubious operation on enum */
gtk_signal_disconnect_by_func((GtkObject*)(beval->target),
GTK_SIGNAL_FUNC(target_event_cb),
beval);
if (gtk_socket_id == 0 && gui.mainwin != NULL
&& gtk_widget_is_ancestor(beval->target, gui.mainwin))
{
/* LINTED: avoid warning: dubious operation on enum */
gtk_signal_disconnect_by_func((GtkObject*)(gui.mainwin),
GTK_SIGNAL_FUNC(mainwin_event_cb),
beval);
}
}
static gint
target_event_cb(GtkWidget *widget, GdkEvent *event, gpointer data)
{
BalloonEval *beval = (BalloonEval *)data;
switch (event->type)
{
case GDK_ENTER_NOTIFY:
pointer_event(beval, (int)event->crossing.x,
(int)event->crossing.y,
event->crossing.state);
break;
case GDK_MOTION_NOTIFY:
if (event->motion.is_hint)
{
int x;
int y;
GdkModifierType state;
/*
* GDK_POINTER_MOTION_HINT_MASK is set, thus we cannot obtain
* the coordinates from the GdkEventMotion struct directly.
*/
gdk_window_get_pointer(widget->window, &x, &y, &state);
pointer_event(beval, x, y, (unsigned int)state);
}
else
{
pointer_event(beval, (int)event->motion.x,
(int)event->motion.y,
event->motion.state);
}
break;
case GDK_LEAVE_NOTIFY:
/*
* Ignore LeaveNotify events that are not "normal".
* Apparently we also get it when somebody else grabs focus.
*/
if (event->crossing.mode == GDK_CROSSING_NORMAL)
cancelBalloon(beval);
break;
case GDK_BUTTON_PRESS:
case GDK_SCROLL:
cancelBalloon(beval);
break;
case GDK_KEY_PRESS:
key_event(beval, event->key.keyval, TRUE);
break;
case GDK_KEY_RELEASE:
key_event(beval, event->key.keyval, FALSE);
break;
default:
break;
}
return FALSE; /* continue emission */
}
static gint
mainwin_event_cb(GtkWidget *widget UNUSED, GdkEvent *event, gpointer data)
{
BalloonEval *beval = (BalloonEval *)data;
switch (event->type)
{
case GDK_KEY_PRESS:
key_event(beval, event->key.keyval, TRUE);
break;
case GDK_KEY_RELEASE:
key_event(beval, event->key.keyval, FALSE);
break;
default:
break;
}
return FALSE; /* continue emission */
}
static void
pointer_event(BalloonEval *beval, int x, int y, unsigned state)
{
int distance;
distance = ABS(x - beval->x) + ABS(y - beval->y);
if (distance > 4)
{
/*
* Moved out of the balloon location: cancel it.
* Remember button state
*/
beval->state = state;
cancelBalloon(beval);
/* Mouse buttons are pressed - no balloon now */
if (!(state & ((int)GDK_BUTTON1_MASK | (int)GDK_BUTTON2_MASK
| (int)GDK_BUTTON3_MASK)))
{
beval->x = x;
beval->y = y;
if (state & (int)GDK_MOD1_MASK)
{
/*
* Alt is pressed -- enter super-evaluate-mode,
* where there is no time delay
*/
if (beval->msgCB != NULL)
{
beval->showState = ShS_PENDING;
(*beval->msgCB)(beval, state);
}
}
else
{
beval->timerID = gtk_timeout_add((guint32)p_bdlay,
&timeout_cb, beval);
}
}
}
}
static void
key_event(BalloonEval *beval, unsigned keyval, int is_keypress)
{
if (beval->showState == ShS_SHOWING && beval->msgCB != NULL)
{
switch (keyval)
{
case GDK_Shift_L:
case GDK_Shift_R:
beval->showState = ShS_UPDATE_PENDING;
(*beval->msgCB)(beval, (is_keypress)
? (int)GDK_SHIFT_MASK : 0);
break;
case GDK_Control_L:
case GDK_Control_R:
beval->showState = ShS_UPDATE_PENDING;
(*beval->msgCB)(beval, (is_keypress)
? (int)GDK_CONTROL_MASK : 0);
break;
default:
/* Don't do this for key release, we apparently get these with
* focus changes in some GTK version. */
if (is_keypress)
cancelBalloon(beval);
break;
}
}
else
cancelBalloon(beval);
}
static gint
timeout_cb(gpointer data)
{
BalloonEval *beval = (BalloonEval *)data;
beval->timerID = 0;
/*
* If the timer event happens then the mouse has stopped long enough for
* a request to be started. The request will only send to the debugger if
* there the mouse is pointing at real data.
*/
requestBalloon(beval);
return FALSE; /* don't call me again */
}
static gint
balloon_expose_event_cb(GtkWidget *widget,
GdkEventExpose *event,
gpointer data UNUSED)
{
gtk_paint_flat_box(widget->style, widget->window,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
&event->area, widget, "tooltip",
0, 0, -1, -1);
return FALSE; /* continue emission */
}
#else /* !FEAT_GUI_GTK */
static void
addEventHandler(target, beval)
Widget target;
BalloonEval *beval;
{
XtAddEventHandler(target,
PointerMotionMask | EnterWindowMask |
LeaveWindowMask | ButtonPressMask | KeyPressMask |
KeyReleaseMask,
False,
pointerEventEH, (XtPointer)beval);
}
static void
removeEventHandler(beval)
BalloonEval *beval;
{
XtRemoveEventHandler(beval->target,
PointerMotionMask | EnterWindowMask |
LeaveWindowMask | ButtonPressMask | KeyPressMask |
KeyReleaseMask,
False,
pointerEventEH, (XtPointer)beval);
}
/*
* The X event handler. All it does is call the real event handler.
*/
static void
pointerEventEH(w, client_data, event, unused)
Widget w UNUSED;
XtPointer client_data;
XEvent *event;
Boolean *unused UNUSED;
{
BalloonEval *beval = (BalloonEval *)client_data;
pointerEvent(beval, event);
}
/*
* The real event handler. Called by pointerEventEH() whenever an event we are
* interested in occurs.
*/
static void
pointerEvent(beval, event)
BalloonEval *beval;
XEvent *event;
{
Position distance; /* a measure of how much the ponter moved */
Position delta; /* used to compute distance */
switch (event->type)
{
case EnterNotify:
case MotionNotify:
delta = event->xmotion.x - beval->x;
if (delta < 0)
delta = -delta;
distance = delta;
delta = event->xmotion.y - beval->y;
if (delta < 0)
delta = -delta;
distance += delta;
if (distance > 4)
{
/*
* Moved out of the balloon location: cancel it.
* Remember button state
*/
beval->state = event->xmotion.state;
if (beval->state & (Button1Mask|Button2Mask|Button3Mask))
{
/* Mouse buttons are pressed - no balloon now */
cancelBalloon(beval);
}
else if (beval->state & (Mod1Mask|Mod2Mask|Mod3Mask))
{
/*
* Alt is pressed -- enter super-evaluate-mode,
* where there is no time delay
*/
beval->x = event->xmotion.x;
beval->y = event->xmotion.y;
beval->x_root = event->xmotion.x_root;
beval->y_root = event->xmotion.y_root;
cancelBalloon(beval);
if (beval->msgCB != NULL)
{
beval->showState = ShS_PENDING;
(*beval->msgCB)(beval, beval->state);
}
}
else
{
beval->x = event->xmotion.x;
beval->y = event->xmotion.y;
beval->x_root = event->xmotion.x_root;
beval->y_root = event->xmotion.y_root;
cancelBalloon(beval);
beval->timerID = XtAppAddTimeOut( beval->appContext,
(long_u)p_bdlay, timerRoutine, beval);
}
}
break;
/*
* Motif and Athena version: Keystrokes will be caught by the
* "textArea" widget, and handled in gui_x11_key_hit_cb().
*/
case KeyPress:
if (beval->showState == ShS_SHOWING && beval->msgCB != NULL)
{
Modifiers modifier;
KeySym keysym;
XtTranslateKeycode(gui.dpy,
event->xkey.keycode, event->xkey.state,
&modifier, &keysym);
if (keysym == XK_Shift_L || keysym == XK_Shift_R)
{
beval->showState = ShS_UPDATE_PENDING;
(*beval->msgCB)(beval, ShiftMask);
}
else if (keysym == XK_Control_L || keysym == XK_Control_R)
{
beval->showState = ShS_UPDATE_PENDING;
(*beval->msgCB)(beval, ControlMask);
}
else
cancelBalloon(beval);
}
else
cancelBalloon(beval);
break;
case KeyRelease:
if (beval->showState == ShS_SHOWING && beval->msgCB != NULL)
{
Modifiers modifier;
KeySym keysym;
XtTranslateKeycode(gui.dpy, event->xkey.keycode,
event->xkey.state, &modifier, &keysym);
if ((keysym == XK_Shift_L) || (keysym == XK_Shift_R)) {
beval->showState = ShS_UPDATE_PENDING;
(*beval->msgCB)(beval, 0);
}
else if ((keysym == XK_Control_L) || (keysym == XK_Control_R))
{
beval->showState = ShS_UPDATE_PENDING;
(*beval->msgCB)(beval, 0);
}
else
cancelBalloon(beval);
}
else
cancelBalloon(beval);
break;
case LeaveNotify:
/* Ignore LeaveNotify events that are not "normal".
* Apparently we also get it when somebody else grabs focus.
* Happens for me every two seconds (some clipboard tool?) */
if (event->xcrossing.mode == NotifyNormal)
cancelBalloon(beval);
break;
case ButtonPress:
cancelBalloon(beval);
break;
default:
break;
}
}
static void
timerRoutine(dx, id)
XtPointer dx;
XtIntervalId *id UNUSED;
{
BalloonEval *beval = (BalloonEval *)dx;
beval->timerID = (XtIntervalId)NULL;
/*
* If the timer event happens then the mouse has stopped long enough for
* a request to be started. The request will only send to the debugger if
* there the mouse is pointing at real data.
*/
requestBalloon(beval);
}
#endif /* !FEAT_GUI_GTK */
static void
requestBalloon(beval)
BalloonEval *beval;
{
if (beval->showState != ShS_PENDING)
{
/* Determine the beval to display */
if (beval->msgCB != NULL)
{
beval->showState = ShS_PENDING;
(*beval->msgCB)(beval, beval->state);
}
else if (beval->msg != NULL)
drawBalloon(beval);
}
}
#ifdef FEAT_GUI_GTK
/*
* Convert the string to UTF-8 if 'encoding' is not "utf-8".
* Replace any non-printable characters and invalid bytes sequences with
* "^X" or "<xx>" escapes, and apply SpecialKey highlighting to them.
* TAB and NL are passed through unscathed.
*/
# define IS_NONPRINTABLE(c) (((c) < 0x20 && (c) != TAB && (c) != NL) \
|| (c) == DEL)
static void
set_printable_label_text(GtkLabel *label, char_u *text)
{
char_u *convbuf = NULL;
char_u *buf;
char_u *p;
char_u *pdest;
unsigned int len;
int charlen;
int uc;
PangoAttrList *attr_list;
/* Convert to UTF-8 if it isn't already */
if (output_conv.vc_type != CONV_NONE)
{
convbuf = string_convert(&output_conv, text, NULL);
if (convbuf != NULL)
text = convbuf;
}
/* First let's see how much we need to allocate */
len = 0;
for (p = text; *p != NUL; p += charlen)
{
if ((*p & 0x80) == 0) /* be quick for ASCII */
{
charlen = 1;
len += IS_NONPRINTABLE(*p) ? 2 : 1; /* nonprintable: ^X */
}
else
{
charlen = utf_ptr2len(p);
uc = utf_ptr2char(p);
if (charlen != utf_char2len(uc))
charlen = 1; /* reject overlong sequences */
if (charlen == 1 || uc < 0xa0) /* illegal byte or */
len += 4; /* control char: <xx> */
else if (!utf_printable(uc))
/* Note: we assume here that utf_printable() doesn't
* care about characters outside the BMP. */
len += 6; /* nonprintable: <xxxx> */
else
len += charlen;
}
}
attr_list = pango_attr_list_new();
buf = alloc(len + 1);
/* Now go for the real work */
if (buf != NULL)
{
attrentry_T *aep;
PangoAttribute *attr;
guicolor_T pixel;
GdkColor color = { 0, 0, 0, 0 };
/* Look up the RGB values of the SpecialKey foreground color. */
aep = syn_gui_attr2entry(hl_attr(HLF_8));
pixel = (aep != NULL) ? aep->ae_u.gui.fg_color : INVALCOLOR;
if (pixel != INVALCOLOR)
gdk_colormap_query_color(gtk_widget_get_colormap(gui.drawarea),
(unsigned long)pixel, &color);
pdest = buf;
p = text;
while (*p != NUL)
{
/* Be quick for ASCII */
if ((*p & 0x80) == 0 && !IS_NONPRINTABLE(*p))
{
*pdest++ = *p++;
}
else
{
charlen = utf_ptr2len(p);
uc = utf_ptr2char(p);
if (charlen != utf_char2len(uc))
charlen = 1; /* reject overlong sequences */
if (charlen == 1 || uc < 0xa0 || !utf_printable(uc))
{
int outlen;
/* Careful: we can't just use transchar_byte() here,
* since 'encoding' is not necessarily set to "utf-8". */
if (*p & 0x80 && charlen == 1)
{
transchar_hex(pdest, *p); /* <xx> */
outlen = 4;
}
else if (uc >= 0x80)
{
/* Note: we assume here that utf_printable() doesn't
* care about characters outside the BMP. */
transchar_hex(pdest, uc); /* <xx> or <xxxx> */
outlen = (uc < 0x100) ? 4 : 6;
}