好吧,所以,在我的C#Cosmos操作系统中,我正在使用一个允许我输入字符串和所需宽度的系统,并根据宽度将字符串包装成行。
它的工作原理如下:输入字符串是" Hello Hello world"。宽度为6.算法将遍历字符串,如果char索引是宽度的索引,并且当前char是空格,则它将从字符串的开头到该点采取所有内容,添加它到List,并从字符串本身中删除它,并将char索引重置为0,然后重新开始。它执行此操作直到字符串为空或小于宽度。如果它小于宽度,则将其添加到List中,并且for循环终止。在非专业人士中,我们的输出字符串应如下所示:
您好
美丽
世界。
这是我的代码。
public static List<string> split_string(int width, string text)
{
List<string> text_lines = new List<string>();
//Separate lines of text.
for (int i = 0; i < text.Length; i++)
{
if (text.Length <= width)
{
text_lines.Add(text);
i = text.Length + 5;
}
else
{
if (i >= width)
{
if (text[i] == ' ')
{
text_lines.Add(text.Substring(0, i + 1));
text = text.Remove(0, i + 1);
i = 0;
}
}
}
}
return text_lines;
}
事情是,有时,如果我最终不得不处理小于宽度的字符串,我们就会遇到问题。它似乎跳过了字符串的那一部分。糟糕!
例如,这是我使用此操作系统的操作系统。它应该采用标题和消息,然后使用OK按钮将其显示在消息框中。
public static void ShowMessagebox(string title, string text)
{
int splitWidth = 25;
if(text.Length < splitWidth)
{
splitWidth = text.Length;
}
if(title.Length > splitWidth)
{
splitWidth = title.Length;
}
var lines = new List<string>();
if(splitWidth > text.Length)
{
lines.Add(text);
}
else
{
lines = TUI.Utils.split_string(splitWidth, text);
}
foreach(var line in lines)
{
if(text.Contains(line))
{
text = text.Replace(line, "");
}
}
if(text.Length > 0)
{
lines.Add(text);
}
int h = lines.Count + 4;
int w = 0;
foreach(var line in lines)
{
if(line.Length + 4 > w)
{
w = line.Length + 4;
}
}
int x = (Console.WindowWidth - w) / 2;
int y = (Console.WindowHeight - h) / 2;
TUI.Utils.ClearArea(x, y, w, h, ConsoleColor.Green);
TUI.Utils.ClearArea(x, y, w, 1, ConsoleColor.White);
TUI.Utils.Write(x + 1, y, title, ConsoleColor.White, ConsoleColor.Black);
for(int i = 0; i < lines.Count - 1; i++)
{
TUI.Utils.Write(x + 2, (y + 2) + i, lines[i], ConsoleColor.Green, ConsoleColor.White);
}
int xw = x + w;
int yh = y + h;
TUI.Utils.Write(xw - 6, yh - 2, "<OK>", TUI.Utils.COL_BUTTON_SELECTED, TUI.Utils.COL_BUTTON_TEXT);
bool stuck = true;
while (stuck)
{
var kinf = Console.ReadKey();
if (kinf.Key == ConsoleKey.Enter)
{
stuck = false;
Console.Clear();
}
else
{
}
}
}
非常简单。以默认宽度25个字符开始,如果标题较大,则将其设置为标题长度。如果文本长度小于宽度,则设置宽度以进行补偿。然后它从上面调用分割器算法,在&#39; TUI.Utils&#39;中找到,然后做一些东西打印到屏幕上。
这是我的操作系统&#34; ConfigurationManager&#34;,一个接收用户输入并使用它来生成配置文件的应用程序。现在正在进行中。
Curse.ShowMessagebox("Memphis can't run properly this system.", "Memphis needs at least one FAT partition on a Master Boot Record to be able to store it's configuration and other files on. Please use a partition utility like GParted to partition your hard drive properly.");
但看看屏幕上出现的内容......
The messagebox coming out of the above method call
正如你所看到的,并不是我想要的东西。它缺少一些字符串!
答案 0 :(得分:2)
您不需要更改text
,因为我们可以存储原始子字符串的偏移量。我们做的字符串操作越少越好。
public static List<string> split_string(int width, string text)
{
width = width - 1; //So we're not constantly comparing to width - 1
var returnSet = new List<string>();
var currLength = 0;
var oldOffset = 0;
for (var i = 0; i < text.Length; i++)
{
if (currLength >= width && text[i] == ' ')
{
returnSet.Add(text.Substring(oldOffset, i - oldOffset));
oldOffset = i + 1;
currLength = 0;
continue;
}
currLength++;
}
if (oldOffset < text.Length)
returnSet.Add(text.Substring(oldOffset));
return returnSet;
}
测试:
split_string(25, "Memphis needs at least one FAT partition on a Master Boot Record to be able to store it's configuration and other files on. Please use a partition utility like GParted to partition your hard drive properly.");
给出:
Memphis needs at least one FAT partition on a Master Boot Record to be able to store it's configuration and other files on. Please use a partition utility like GParted to partition your hard drive properly.
split_string(6, "Hello beautiful world.")
给出
Hello beautiful world.