vim macro

Recording macros

Occasionally, you'll find yourself doing the same thing over and over to blocks of text in your document. vim will let you record an ad-hoc macro to perform the operation.

• qregister Start macro recording into the named register. For instance, qa starts recording and puts the macro into register a.


• q End recording.


• @register Replay the macro stored in the named register. For instance, @a replays the macro in register a.

如何取得系统的闲置（idle）时间

在windows平台上，利用调用GetLastInputInfo()函数得到最后一次输入事件发生的时间，通过计算当前时间与最后输入时间的时间差得到系统闲置时间。

定义：

#define _WIN32_WINNT 0x0500
#include <windows.h>
#define EXPORT __declspec(dllexport)

typedef BOOL (WINAPI *GETLASTINPUTINFO)(LASTINPUTINFO *);
static HMODULE g_user32 = NULL;
static GETLASTINPUTINFO g_GetLastInputInfo = NULL;

初始化：

g_user32 = LoadLibrary("user32.dll");
if (g_user32) {
 g_GetLastInputInfo = (GETLASTINPUTINFO)GetProcAddress(g_user32, "GetLastInputInfo");
}

得到系统闲置时间：

int idle_time = 0;

if (g_GetLastInputInfo != NULL) {
 LASTINPUTINFO lii;
 memset(&lii, 0, sizeof(lii));
 lii.cbSize = sizeof(lii);
 if (g_GetLastInputInfo(&lii)) {
  idle_time = lii.dwTime;
 }
 idle_time = (GetTickCount() - idle_time) / 1000;
}

在Linux下，则是利用X11屏保扩展函数中的相关调用得到系统闲置时间。

定义：

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/scrnsaver.h>
#include <gdk/gdkx.h>
#include <gtk/gtk.h>

得到系统闲置时间：

static XScreenSaverInfo *mit_info = NULL;
int idle_time, event_base, error_base;

gtk_init (NULL, NULL);
if (XScreenSaverQueryExtension(GDK_DISPLAY(), &event_base, &error_base))
{
 if (mit_info == NULL)
  mit_info = XScreenSaverAllocInfo();
 XScreenSaverQueryInfo(GDK_DISPLAY(), GDK_ROOT_WINDOW(), mit_info);
 idle_time = (mit_info->idle) / 1000;
}
else
 idle_time = 0;