解决Ubuntu下Sublime text 3中文输入的问题

好久之前便听朋友说起Sublime Text这款软件很好用，终于这几天有空折腾，把软件给装起来了。用起来确实很不错，写代码很爽。
但是用了一段时间之后，我需要输入中文了，无论怎么切换输入法，都无法切换到中文。 网上搜索了一下，原来这是Bug。找解决方法吧。下面介绍我的解决方案，是大神cjacker解决成功的啦，我只是copy一下，方便大家在遇到这个问题的时候可以方便解决。 <!-- more -->

    我的系统：ubuntu 13.04  
    我的输入法：fcitx   
    sublime版本：3059    

理论上支持 sublime text2/3

1.保存代码sublime-imfix.c

/*
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); 
}

2.安装C/C++的编译环境和gtk libgtk2.0-dev

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

3.编译共享内存

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

4.启动测试

LD_PRELOAD = ./libsublime-imfix.so sublime_text

正常的话这样是没有问题的。

然后我们在修改我们的desktop文件，使图标也可以使用

sudo vi /usr/share/applications/sublime-text.desktop

先将so文件移动到sublime text的目录

然后按照如下替换（主要是每次执行之前，去预加载我们的libsublime-imfix.so库）

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

[Desktop Action Window]
Name=New Window
Exec=bash -c 'LD_PRELOAD=/opt/sublime_text/libsublime-imfix.so /opt/sublime_text/sublime_text' -n
OnlyShowIn=Unity;

[Desktop Action Document]
Name=New File
Exec=bash -c 'LD_PRELOAD=/opt/sublime_text/libsublime-imfix.so /opt/sublime_text/sublime_text' --command new_file
OnlyShowIn=Unity;