SublimeText 3 中文输入问题

技术

在 KUbuntu 14.04 以及 Ubuntu14.04 下安装 SublimeText 3 之后往往会发现不支持输入中文，下面根据自身实践，总结办法如下方法。

工具原料

  • KUbuntu 14.04 或 Ubuntu 14.04
  • fcitx 小企鹅输入法
  • Sublime Text 3

安装相关依赖软件

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

保存下面的代码到文件 sublime_imfix.c (位于~ `目录)

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/*
 * 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);
}

编译该文件

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

在当前目录下得到libsublime-imfix.so 这个共享库。

尝试是否可以成功输入中文

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$ LD_PRELOAD=./libsublime-imfix.so subl             #subl是安装好SublimeText 3后的程序启动命令
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如果一切正常，在启动之后，fcitx 输入法就能可以输入了。

## 方便使用上的修改

上一步每次都得输入那么长的命令，比较麻烦。所以下面对其做简单修改。

然后将`libsublime-imfix.so`拷贝到`sublime_text`所在文件夹

``` sh
$ sudo mv libsublime-imfix.so /opt/sublime_text/

修改文件/usr/bin/subl的内容

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$ sudo subl /usr/bin/subl

将

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#!/bin/sh

exec /opt/sublime_text/sublime_text "$@"

修改为

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#!/bin/sh

LD_PRELOAD=/opt/sublime_text/libsublime-imfix.so exec /opt/sublime_text/sublime_text "$@"

此时，在命令中执行subl 将可以使用 fcitx 的中文输入

为了使用鼠标右键打开文件时能够使用中文输入，还需要修改文件sublime_text.desktop的内容。

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$ sudo gedit /usr/share/applications/sublime_text.desktop

将[Desktop Entry]中的字符串

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Exec=/opt/sublime_text/sublime_text %F

修改为

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Exec=bash -c "LD_PRELOAD=/opt/sublime_text/libsublime-imfix.so exec /opt/sublime_text/sublime_text %F"

将[Desktop Action Window]中的字符串

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$ Exec=/opt/sublime_text/sublime_text -n

修改为

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$ Exec=bash -c "LD_PRELOAD=/opt/sublime_text/libsublime-imfix.so exec /opt/sublime_text/sublime_text -n"

将[Desktop Action Document]中的字符串

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$ Exec=/opt/sublime_text/sublime_text --command new_file

修改为

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$ Exec=bash -c "LD_PRELOAD=/opt/sublime_text/libsublime-imfix.so exec /opt/sublime_text/sublime_text --command new_file"

注意

修改时请注意双引号””,否则会导致不能打开带有空格文件名的文件。此处仅修改了/usr/share/applications/sublime-text.desktop，但可以正常使用了。

opt/sublime_text/目录下的sublime-text.desktop可以修改，也可不修改。