前提：所有的操作均在当前用户的主目录中

1, save below code to sublime_imfix.c 保存下面的代码为sublime_imfix.c文件

/*
 * sublime-imfix.c
 * Use LD_PRELOAD to interpose some function to fix sublime input method support for linux.
 * By Cjacker Huang  *
 *
 * 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);
}

2, compile a shared library. 需要安装C/C++的编译环境和gtk libgtk2.0-dev

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

3,按照文件头上注释所说的编译该文件，在终端里进入到存放该文件的目录中，输入如下命令：

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

最后在当前目录下得到libsublime-imfix.so这个共享库。

这里技安把这个共享库拷贝到usr/lib目录下

sudo cp libsublime-imfix.so /usr/lib

4, LD_PRELOAD it

#sublime2
LD_PRELOAD=/usr/lib/libsublime-imfix.so sublime_text
#sublime3
LD_PRELOAD=/usr/lib/libsublime-imfix.so subl

但是这样的话，我们每次都要在终端里面使用命令启动sublime text 2，这样很不方便，接下来我们还要通过修改sublime-text-2.desktop达到点击图标启动。

打开终端进入applications修改sublime-text-2.desktop

cd /usr/share/applications
sudo vim sublime-text-2.desktop

 

[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
 Icon=/opt/Sublime Text 2/Icon/48x48/sublime_text.png
 Terminal=false
 MimeType=text/plain;
 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 2/sublime_text --command new_file
 OnlyShowIn=Unity;

打开sublime-text-2.desktop后

将Exec=/opt/sublime_text/sublime_text %F
修改成：Exec=bash -c 'LD_PRELOAD=/usr/lib/libsublime-imfix.so sublime' %F
将Exec=/opt/sublime_text/sublime_text -n
修改成：Exec=bash -c 'LD_PRELOAD=/usr/lib/libsublime-imfix.so sublime' -n

好了，接下来你在dash中点击打开sublime text2吧，开始你的代码之旅吧。