/*
sublime-imfix.c
Use LD_PRELOAD to interpose some function to fix sublime input method support for linux.
By Cjacker Huang <jianzhong.huang at i-soft.com.cn>
gcc -shared -o libsublime-imfix.so sublime_imfix.c  `pkg-config --libs --cflags gtk+-2.0` -fPIC
LD_PRELOAD=./libsublime-imfix.so sublime_text
*/
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
typedef GdkSegment GdkRegionBox;struct _GdkRegion
{long size;long numRects;GdkRegionBox *rects;GdkRegionBox extents;
};GtkIMContext *local_context;void
gdk_region_get_clipbox (const GdkRegion *region,GdkRectangle    *rectangle)
{g_return_if_fail (region != NULL);g_return_if_fail (rectangle != NULL);rectangle->x = region->extents.x1;rectangle->y = region->extents.y1;rectangle->width = region->extents.x2 - region->extents.x1;rectangle->height = region->extents.y2 - region->extents.y1;GdkRectangle rect;rect.x = rectangle->x;rect.y = rectangle->y;rect.width = 0;rect.height = rectangle->height; //The caret width is 2; //Maybe sometimes we will make a mistake, but for most of the time, it should be the caret.if(rectangle->width == 2 && GTK_IS_IM_CONTEXT(local_context)) {gtk_im_context_set_cursor_location(local_context, rectangle);}
}//this is needed, for example, if you input something in file dialog and return back the edit area
//context will lost, so here we set it again.static GdkFilterReturn event_filter (GdkXEvent *xevent, GdkEvent *event, gpointer im_context)
{XEvent *xev = (XEvent *)xevent;if(xev->type == KeyRelease && GTK_IS_IM_CONTEXT(im_context)) {GdkWindow * win = g_object_get_data(G_OBJECT(im_context),"window");if(GDK_IS_WINDOW(win))gtk_im_context_set_client_window(im_context, win);}return GDK_FILTER_CONTINUE;
}void gtk_im_context_set_client_window (GtkIMContext *context,GdkWindow    *window)
{GtkIMContextClass *klass;g_return_if_fail (GTK_IS_IM_CONTEXT (context));klass = GTK_IM_CONTEXT_GET_CLASS (context);if (klass->set_client_window)klass->set_client_window (context, window);if(!GDK_IS_WINDOW (window))return;g_object_set_data(G_OBJECT(context),"window",window);int width = gdk_window_get_width(window);int height = gdk_window_get_height(window);if(width != 0 && height !=0) {gtk_im_context_focus_in(context);local_context = context;}gdk_window_add_filter (window, event_filter, context);
}

sudo apt-get install build-essential libgtk2.0-dev

gcc -shared -o libsublime-imfix.so sublime-imfix.c `pkg-config --libs --cflags gtk+-2.0` -fPIC

mv libsublime-imfix.so /opt/sublime_text

LD_PRELOAD=./libsublime-imfix.so ./sublime_text

cd /usr/share/applications/

[Desktop Entry]
Version=1.0
Type=Application
Name=Sublime Text
GenericName=Text Editor
Comment=Sophisticated text editor for code, markup and prose
#Exec=/opt/sublime_text/sublime_text %F
Exec=bash -c "LD_PRELOAD=/opt/sublime_text/libsublime-imfix.so /opt/sublime_text/sublime_text"
Terminal=false
MimeType=text/plain;
Icon=sublime-text
Categories=TextEditor;Development;
StartupNotify=true
Actions=Window;Document;[Desktop Action Window]
Name=New Window
Exec=/opt/sublime_text/sublime_text -n
OnlyShowIn=Unity;[Desktop Action Document]
Name=New File
Exec=/opt/sublime_text/sublime_text --command new_file
OnlyShowIn=Unity;