evince：禁用除 PageDown、PageUp 之外的所有键盘快捷键

试试这些。一定要给chmod +x filename它们执行权限。only_direction_keys.sh将关闭大部分键盘映射，只留下箭头键和 PgUp 和 PgDn 键，然后启动 evince。首先启动这个！

Key_reset.sh将您的按键绑定重置为之前的设置。完成后您需要运行此命令。

请在运行前仔细查看代码，并进行任何您认为适合您需要的更改。更改 Evince 的键绑定有点麻烦，但当我通过一些测试运行它时，这种解决方法似乎效果很好。虽然不完美，但可以完成工作。此外，在盲目运行网络上陌生人的代码之前检查代码是个好主意 :)

首先，安装xbindkeys：

sudo apt install xbindkeys

shell脚本如下：

1. only_direction_keys.sh：

#!/bin/bash

# Create a default xbindkeys configuration file if it doesn't exist
if [ ! -f ~/.xbindkeysrc ]; then
  touch ~/.xbindkeysrc
fi

# Backup the current xbindkeys config before we modify it
cp ~/.xbindkeysrc ~/.xbindkeysrc.bak

# Disable all keys except arrow keys and PageUp/PageDown

# Start by clearing the current xbindkeys configuration
> ~/.xbindkeysrc

# Define keybindings for the allowed keys (arrow keys and PgUp/PgDn)
# We will bind these keys to "do nothing" commands so they are active

# Up arrow
echo "'echo'" >> ~/.xbindkeysrc
echo "  m:0x0 + c:111" >> ~/.xbindkeysrc

# Down arrow
echo "'echo'" >> ~/.xbindkeysrc
echo "  m:0x0 + c:116" >> ~/.xbindkeysrc

# Left arrow
echo "'echo'" >> ~/.xbindkeysrc
echo "  m:0x0 + c:113" >> ~/.xbindkeysrc

# Right arrow
echo "'echo'" >> ~/.xbindkeysrc
echo "  m:0x0 + c:114" >> ~/.xbindkeysrc

# Page Up
echo "'echo'" >> ~/.xbindkeysrc
echo "  m:0x0 + c:112" >> ~/.xbindkeysrc

# Page Down
echo "'echo'" >> ~/.xbindkeysrc
echo "  m:0x0 + c:117" >> ~/.xbindkeysrc

# Now we will block all other keys by binding them to a dummy action
# Disable the remaining keys (this is a simple solution, not an exhaustive list)
for keycode in {1..255}; do
  # Skip the allowed keys (up, down, left, right, PgUp, PgDn)
  if [[ "$keycode" != "111" && "$keycode" != "116" && "$keycode" != "113" && "$keycode" != "114" && "$keycode" != "112" && "$keycode" != "117" ]]; then
  echo "'xdotool key --clearmodifiers F13'" >> ~/.xbindkeysrc
  echo "  m:0x0 + c:$keycode" >> ~/.xbindkeysrc
fi
done

# Apply the new xbindkeys configuration
xbindkeys -p

# Launch evince
evince

2. key_reset.sh：

#!/bin/sh
cp ~/.xbindkeysrc.bak ~/.xbindkeysrc
xbindkeys -p

如果我们查看新闻来源，我们会发现

Evince 45.alpha

• 删除自定义加速度文件的加载和保存

所以我认为不再支持该功能。此外，在源代码中，我们在ev-application.c中找到了代码

ev_application_startup (GApplication *gapplication)
 const gchar *action_accels[] = {
  "win.open",       "<Ctrl>O", NULL,
  "win.open-copy",  "<Ctrl>N", NULL,
...
 for (it = action_accels; it[0]; it += g_strv_length ((gchar **)it) + 1)
   gtk_application_set_accels_for_action (GTK_APPLICATION (application), it[0], &it[1]);

我们看到固定绑定已经设置完毕。

要更改或删除绑定，我们可以编辑此代码并重新编译应用程序，或者更简单地说，我们可以在应用程序和动态加载的 gtk 库之间插入一个垫片。例如，垫片可以不调用 函数gtk_application_set_accels_for_action()，win.open从而删除<Ctrl>O该操作的绑定。或者我们可以更改绑定以使其<Ctrl>Z工作。这是一个合适的文件shim_gtk.c：

/*
 * capture calls to a routine and replace with your code
 * gcc -Wall -O2 -fpic -shared -ldl -o shim_gtk.so shim_gtk.c
 * LD_PRELOAD=/.../shim_gtk.so /bin/evince
 * https://unix.stackexchange.com/q/787459/119298
 */
#define _GNU_SOURCE /* needed to get RTLD_NEXT defined in dlfcn.h */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <dlfcn.h>

void gtk_application_set_accels_for_action(char *app, char *action, char **accels){
    static char *(*real_fn)(char *app, char *action, char **accels) = NULL;

    if (!real_fn) {
        real_fn = dlsym(RTLD_NEXT, "gtk_application_set_accels_for_action");
        char *error = dlerror();
        if (error != NULL) {
            fprintf(stderr, "%s\n", error);
            exit(1);
        }
    }
#if 0
    if(strcmp(action, "win.open")==0){
        fprintf(stderr, "not calling for %s\n", action);
    }else{
        fprintf(stderr, "doing call for %s\n", action);
        real_fn(app, action, accels);
    }
#endif
#if 1
    if(strcmp(action, "win.open")==0){
        fprintf(stderr, "binding for %s\n", action);
        static char *mybinding[] = { "<Ctrl>Z", 0 }; // nul terminated utf8
        real_fn(app, action, mybinding);
    }else{
        real_fn(app, action, accels);
    }
#endif
}

这里#if 0用于禁用一些代码，并#if 1启用一些其他示例代码来执行上述操作。使用

gcc -Wall -O2 -fpic -shared -ldl -o shim_gtk.so shim_gtk.c

并运行

LD_PRELOAD=/.../shim_gtk.so /bin/evince ...

进行适当的替换...。您应该删除调试fprintf()调用，因为它们可能会干扰应用程序对 stderr 的实际使用。