TextLayout.h

// Copyright (c) 2016-2018 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
 
#pragma once
#include <kiwano/math/Math.h>
#include <kiwano/platform/NativeObject.hpp>
#include <kiwano/render/TextStyle.h>
 
namespace kiwano
{
 
class KGE_API TextLayout : public NativeObject
{
public:
    TextLayout();
 
    TextLayout(StringView content, const TextStyle& style);
 
    bool IsDirty() const;
 
    void Clear();
 
    void Reset(StringView content, const TextStyle& style);
 
    Size GetSize() const;
 
    uint32_t GetLineCount() const;
 
    uint32_t GetContentLength() const;
 
    void SetFont(RefPtr<Font> font);
 
    void SetUnderline(bool enable);
 
    void SetStrikethrough(bool enable);
 
    void SetAlignment(TextAlign align);
 
    void SetWrapWidth(float wrap_width);
 
    void SetLineSpacing(float line_spacing);
 
    enum class DirtyFlag : uint8_t
    {
        Clean = 0,      
        Dirty = 1 << 0  
    };
 
    DirtyFlag GetDirtyFlag() const;
 
    void SetDirtyFlag(DirtyFlag flag);
 
    bool UpdateIfDirty();
 
private:
    DirtyFlag dirty_flag_;
    uint32_t  line_count_;
    uint32_t  content_length_;
    Size      size_;
};
 
inline bool TextLayout::IsDirty() const
{
    return dirty_flag_ != DirtyFlag::Clean;
}
 
inline uint32_t TextLayout::GetContentLength() const
{
    return content_length_;
}
 
inline TextLayout::DirtyFlag TextLayout::GetDirtyFlag() const
{
    return dirty_flag_;
}
 
inline void TextLayout::SetDirtyFlag(TextLayout::DirtyFlag flag)
{
    dirty_flag_ = flag;
}
 
}  // namespace kiwano