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better Input Method Editor (IME) support

Browse Source 
Features:

- Allow input methods swap with hotkey (E.g. left ctrl + left shift).
- Over-the-spot pre-editing style, pre-edit data placed over insertion point.
- Restart IME without segmentation fault.

TODO:

- Automatically pickup IME if st started before IME
This commit is contained in:
Ivan Tham 2019-02-12 18:41:41 +01:00 committed by Hiltjo Posthuma
parent 75f92eb348
commit e85b6b6466
3 changed files with 54 additions and 17 deletions
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1
st.c
View File

@ -2594,6 +2594,7 @@ draw(void)
term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
term.ocx = cx, term.ocy = term.c.y;
xfinishdraw();
xximspot(term.ocx, term.ocy);
}
void

1
win.h
View File

@ -36,3 +36,4 @@ void xsetmode(int, unsigned int);
void xsetpointermotion(int);
void xsetsel(char *);
int xstartdraw(void);
void xximspot(int, int);

69
x.c
View File

@ -139,6 +139,9 @@ static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
static void xdrawglyph(Glyph, int, int);
static void xclear(int, int, int, int);
static int xgeommasktogravity(int);
static void ximopen(Display *);
static void ximinstantiate(Display *, XPointer, XPointer);
static void ximdestroy(XIM, XPointer, XPointer);
static void xinit(int, int);
static void cresize(int, int);
static void xresize(int, int);
@ -996,6 +999,43 @@ xunloadfonts(void)
xunloadfont(&dc.ibfont);
}
void
ximopen(Display *dpy)
{
XIMCallback destroy = { .client_data = NULL, .callback = ximdestroy };
if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
XSetLocaleModifiers("@im=local");
if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
XSetLocaleModifiers("@im=");
if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL)
die("XOpenIM failed. Could not open input device.\n");
}
}
if (XSetIMValues(xw.xim, XNDestroyCallback, &destroy, NULL) != NULL)
die("XSetIMValues failed. Could not set input method value.\n");
xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
XNClientWindow, xw.win, XNFocusWindow, xw.win, NULL);
if (xw.xic == NULL)
die("XCreateIC failed. Could not obtain input method.\n");
}
void
ximinstantiate(Display *dpy, XPointer client, XPointer call)
{
ximopen(dpy);
XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
ximinstantiate, NULL);
}
void
ximdestroy(XIM xim, XPointer client, XPointer call)
{
xw.xim = NULL;
XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
ximinstantiate, NULL);
}
void
xinit(int cols, int rows)
{
@ -1033,7 +1073,7 @@ xinit(int cols, int rows)
xw.attrs.background_pixel = dc.col[defaultbg].pixel;
xw.attrs.border_pixel = dc.col[defaultbg].pixel;
xw.attrs.bit_gravity = NorthWestGravity;
xw.attrs.event_mask = FocusChangeMask | KeyPressMask
xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
| ExposureMask | VisibilityChangeMask | StructureNotifyMask
| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
xw.attrs.colormap = xw.cmap;
@ -1061,22 +1101,7 @@ xinit(int cols, int rows)
xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
/* input methods */
if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
XSetLocaleModifiers("@im=local");
if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
XSetLocaleModifiers("@im=");
if ((xw.xim = XOpenIM(xw.dpy,
NULL, NULL, NULL)) == NULL) {
die("XOpenIM failed. Could not open input"
" device.\n");
}
}
}
xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
| XIMStatusNothing, XNClientWindow, xw.win,
XNFocusWindow, xw.win, NULL);
if (xw.xic == NULL)
die("XCreateIC failed. Could not obtain input method.\n");
ximopen(xw.dpy);
/* white cursor, black outline */
cursor = XCreateFontCursor(xw.dpy, mouseshape);
@ -1554,6 +1579,16 @@ xfinishdraw(void)
defaultfg : defaultbg].pixel);
}
void
xximspot(int x, int y)
{
XPoint spot = { borderpx + x * win.cw, borderpx + (y + 1) * win.ch };
XVaNestedList attr = XVaCreateNestedList(0, XNSpotLocation, &spot, NULL);
XSetICValues(xw.xic, XNPreeditAttributes, attr, NULL);
XFree(attr);
}
void
expose(XEvent *ev)
{