Libraries: Move to Userland/Libraries/

1 files changed, 184 insertions, 0 deletions

diff --git a/Userland/Libraries/LibLine/Style.h b/Userland/Libraries/LibLine/Style.h
new file mode 100644
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+++ b/Userland/Libraries/LibLine/Style.h
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+/*
+ * Copyright (c) 2020, The SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/String.h>
+#include <AK/Types.h>
+#include <AK/Vector.h>
+#include <stdlib.h>
+
+namespace Line {
+
+class Style {
+public:
+    enum class XtermColor : int {
+        Default = 9,
+        Black = 0,
+        Red,
+        Green,
+        Yellow,
+        Blue,
+        Magenta,
+        Cyan,
+        White,
+        Unchanged,
+    };
+
+    struct AnchoredTag {
+    };
+    struct UnderlineTag {
+    };
+    struct BoldTag {
+    };
+    struct ItalicTag {
+    };
+    struct Color {
+        explicit Color(XtermColor color)
+            : m_xterm_color(color)
+            , m_is_rgb(false)
+        {
+        }
+        Color(u8 r, u8 g, u8 b)
+            : m_rgb_color({ r, g, b })
+            , m_is_rgb(true)
+        {
+        }
+
+        bool is_default() const
+        {
+            return !m_is_rgb && m_xterm_color == XtermColor::Unchanged;
+        }
+
+        XtermColor m_xterm_color { XtermColor::Unchanged };
+        Vector<int, 3> m_rgb_color;
+        bool m_is_rgb { false };
+    };
+
+    struct Background : public Color {
+        explicit Background(XtermColor color)
+            : Color(color)
+        {
+        }
+        Background(u8 r, u8 g, u8 b)
+            : Color(r, g, b)
+        {
+        }
+        String to_vt_escape() const;
+    };
+
+    struct Foreground : public Color {
+        explicit Foreground(XtermColor color)
+            : Color(color)
+        {
+        }
+        Foreground(u8 r, u8 g, u8 b)
+            : Color(r, g, b)
+        {
+        }
+
+        String to_vt_escape() const;
+    };
+
+    struct Hyperlink {
+        explicit Hyperlink(const StringView& link)
+            : m_link(link)
+        {
+            m_has_link = true;
+        }
+
+        Hyperlink() { }
+
+        String to_vt_escape(bool starting) const;
+
+        bool is_empty() const { return !m_has_link; }
+
+        String m_link;
+        bool m_has_link { false };
+    };
+
+    static constexpr UnderlineTag Underline {};
+    static constexpr BoldTag Bold {};
+    static constexpr ItalicTag Italic {};
+    static constexpr AnchoredTag Anchored {};
+
+    // Prepare for the horror of templates.
+    template<typename T, typename... Rest>
+    Style(const T& style_arg, Rest... rest)
+        : Style(rest...)
+    {
+        set(style_arg);
+        m_is_empty = false;
+    }
+    Style() { }
+
+    static Style reset_style()
+    {
+        return { Foreground(XtermColor::Default), Background(XtermColor::Default), Hyperlink("") };
+    }
+
+    Style unified_with(const Style& other, bool prefer_other = true) const
+    {
+        Style style = *this;
+        style.unify_with(other, prefer_other);
+        return style;
+    }
+
+    void unify_with(const Style&, bool prefer_other = false);
+
+    bool underline() const { return m_underline; }
+    bool bold() const { return m_bold; }
+    bool italic() const { return m_italic; }
+    Background background() const { return m_background; }
+    Foreground foreground() const { return m_foreground; }
+    Hyperlink hyperlink() const { return m_hyperlink; }
+
+    void set(const ItalicTag&) { m_italic = true; }
+    void set(const BoldTag&) { m_bold = true; }
+    void set(const UnderlineTag&) { m_underline = true; }
+    void set(const Background& bg) { m_background = bg; }
+    void set(const Foreground& fg) { m_foreground = fg; }
+    void set(const Hyperlink& link) { m_hyperlink = link; }
+    void set(const AnchoredTag&) { m_is_anchored = true; }
+
+    bool is_anchored() const { return m_is_anchored; }
+    bool is_empty() const { return m_is_empty; }
+
+    String to_string() const;
+
+private:
+    bool m_underline { false };
+    bool m_bold { false };
+    bool m_italic { false };
+    Background m_background { XtermColor::Unchanged };
+    Foreground m_foreground { XtermColor::Unchanged };
+    Hyperlink m_hyperlink;
+
+    bool m_is_anchored { false };
+
+    bool m_is_empty { true };
+};
+}