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<div id="projectname">FTXUI<span id="projectnumber"> 6.1.9</span>
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<div id="projectbrief">C++ functional terminal UI.</div>
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<div><div class="header">
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<div class="headertitle"><div class="title">FTXUI 中的 POSIX 管道输入</div></div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><p><a class="anchor" id="ftxui-中的-posix-管道输入"></a></p>
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<dl class="section warning"><dt>警告</dt><dd>此功能仅适用于 Linux 和 macOS。Windows 和 WebAssembly 不支持此功能。</dd></dl>
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<h1><a class="anchor" id="什么是-posix-管道"></a>
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什么是 POSIX 管道？</h1>
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<p>POSIX 管道是两个独立程序之间通信的一种方式。一个程序将其输出直接作为另一个程序的输入。可以把它想象成一个单向的数据传输管道。</p>
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<p><b>示例：</b></p>
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<p>假设您想列出文件然后以交互方式过滤它们。</p>
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<ul>
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<li><code>ls</code>：列出文件。</li>
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<li><code>interactive_grep</code>：一个 FTXUI 应用程序，用于过滤文本并允许您键入。</li>
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</ul>
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<p>您可以使用管道 (<code>|</code>) 连接它们：</p>
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<div class="fragment"><div class="line">ls -l | interactive_grep</div>
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</div><!-- fragment --><p>以下是发生的情况：</p><ol type="1">
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<li><code>ls -l</code> 列出文件详细信息。</li>
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<li><code>|</code> 将此列表直接发送到 <code>interactive_grep</code>。</li>
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<li><code>interactive_grep</code> 接收列表并显示它。因为这是一个 FTXUI 应用程序，所以您可以键入以过滤列表，即使它从 <code>ls</code> 接收了初始数据。</li>
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</ol>
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<h1><a class="anchor" id="ftxui-如何处理管道输入"></a>
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FTXUI 如何处理管道输入</h1>
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<p>现在您了解了什么是 POSIX 管道，接下来让我们看看 FTXUI 如何使用它们。</p>
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<p>FTXUI 允许您的应用程序从其他程序（例如来自管道）读取数据，同时仍允许您使用键盘进行交互。这对于处理数据的交互式命令行工具非常有用。</p>
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<p>通常，FTXUI 应用程序从 <code>stdin</code> 接收所有输入。但是，当 FTXUI 检测到 <code>stdin</code> 连接到管道的输出时（意味着数据正在通过管道输入到您的应用程序中），它会自动切换到从 <code>/dev/tty</code> 读取交互式键盘输入。这可确保您的应用程序即使在处理管道数据时仍能接收用户输入。</p>
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<p>此功能 **默认开启**。</p>
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<p>如果您的 FTXUI 应用程序需要读取管道数据并响应键盘输入，您通常不需要做任何特殊的事情：</p>
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<div class="fragment"><div class="line"><span class="keyword">auto</span> screen = ScreenInteractive::Fullscreen();</div>
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<div class="line"><span class="comment">// screen.HandlePipedInput(true); // 此功能默认开启</span></div>
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<div class="line">screen.Loop(component);</div>
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</div><!-- fragment --><h1><a class="anchor" id="关闭管道输入"></a>
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关闭管道输入</h1>
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<p>如果您不需要此功能，或者它与您的自定义输入处理冲突，则可以将其关闭。</p>
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<p>要禁用它，请在启动应用程序的主循环之前调用 <code>HandlePipedInput(false)</code>：</p>
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<div class="fragment"><div class="line"><span class="keyword">auto</span> screen = ScreenInteractive::Fullscreen();</div>
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<div class="line">screen.HandlePipedInput(<span class="keyword">false</span>); <span class="comment">// 关闭管道输入处理</span></div>
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<div class="line">screen.Loop(component);</div>
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</div><!-- fragment --> </div></div><!-- contents -->
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</div><!-- PageDoc -->
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|||
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|
});
|
|||
|
|
|
|||
|
|
options.forEach(v => {
|
|||
|
|
const option = document.createElement('option');
|
|||
|
|
option.value = v;
|
|||
|
|
// Use the displayMap if provided, otherwise default to the value (v)
|
|||
|
|
option.textContent = displayMap ? displayMap[v] : v;
|
|||
|
|
if (v === current) {
|
|||
|
|
option.selected = true;
|
|||
|
|
}
|
|||
|
|
select.appendChild(option);
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// Apply some styling to make it look good.
|
|||
|
|
Object.assign(select.style, {
|
|||
|
|
backgroundColor: 'rgba(0, 0, 0, 0.8)',
|
|||
|
|
color: 'white',
|
|||
|
|
border: '1px solid rgba(255, 255, 255, 0.2)',
|
|||
|
|
padding: '5px',
|
|||
|
|
borderRadius: '5px',
|
|||
|
|
fontSize: '14px',
|
|||
|
|
fontFamily: 'inherit',
|
|||
|
|
margin: '0 5px 0 0',
|
|||
|
|
cursor: 'pointer'
|
|||
|
|
});
|
|||
|
|
return select;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// 1. Create Language Switcher, passing the language display names map
|
|||
|
|
const langSelect = createSelect(langs, currentLang, lang_paths, 'Select Language', lang_display);
|
|||
|
|
|
|||
|
|
// 2. Create Version Switcher
|
|||
|
|
const versionSelect = createSelect(versions, currentVersion, version_paths, 'Select Version');
|
|||
|
|
|
|||
|
|
// 3. Create FTXUI title.
|
|||
|
|
const ftxuiTitle = document.createElement('span');
|
|||
|
|
ftxuiTitle.textContent = 'FTXUI: ';
|
|||
|
|
Object.assign(ftxuiTitle.style, {
|
|||
|
|
color: 'white',
|
|||
|
|
fontSize: '20px',
|
|||
|
|
fontWeight: 'bold',
|
|||
|
|
marginRight: '10px'
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// 3. Create a container to hold both selectors
|
|||
|
|
const container = document.createElement('div');
|
|||
|
|
container.id = 'version-lang-switchers';
|
|||
|
|
Object.assign(container.style, {
|
|||
|
|
display: 'flex',
|
|||
|
|
alignItems: 'center',
|
|||
|
|
justifyContent: 'flex-end',
|
|||
|
|
width: 'auto'
|
|||
|
|
});
|
|||
|
|
container.appendChild(ftxuiTitle);
|
|||
|
|
container.appendChild(langSelect);
|
|||
|
|
container.appendChild(versionSelect);
|
|||
|
|
|
|||
|
|
Object.assign(container.style, {
|
|||
|
|
backgroundColor: 'rgba(0, 0, 0, 0.5)',
|
|||
|
|
padding: '5px 10px',
|
|||
|
|
borderRadius: '8px'
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
|
|||
|
|
// Replace the Doxygen project number element with our container.
|
|||
|
|
projectNumber.replaceWith(container);
|
|||
|
|
|
|||
|
|
// Clean up the original Doxygen project number text if it still exists nearby
|
|||
|
|
const parent = container.parentElement;
|
|||
|
|
if (parent) {
|
|||
|
|
const textNode = Array.from(parent.childNodes).find(n => n.nodeType === 3 && n.textContent.trim() !== '');
|
|||
|
|
if (textNode) {
|
|||
|
|
textNode.remove();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
</script>
|
|||
|
|
</body>
|
|||
|
|
</html>
|