Class: RubyRich::Layout

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby_rich/layout.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name: nil, ratio: 1, size: nil) ⇒ Layout

Returns a new instance of Layout.



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# File 'lib/ruby_rich/layout.rb', line 6

def initialize(name: nil, ratio: 1, size: nil)
  @name = name
  @ratio = ratio
  @size = size
  @children = []
  @content = nil
  @parent = nil
  @x_offset = 0
  @y_offset = 0
  @width = nil
  @height = nil
  @split_direction = nil
end

Instance Attribute Details

#children ⇒ Object

Returns the value of attribute children.



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# File 'lib/ruby_rich/layout.rb', line 3

def children
  @children
end

#content ⇒ Object

Returns the value of attribute content.



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# File 'lib/ruby_rich/layout.rb', line 3

def content
  @content
end

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/ruby_rich/layout.rb', line 3

def height
  @height
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/ruby_rich/layout.rb', line 3

def name
  @name
end

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/ruby_rich/layout.rb', line 3

def parent
  @parent
end

#ratio ⇒ Object

Returns the value of attribute ratio.



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# File 'lib/ruby_rich/layout.rb', line 3

def ratio
  @ratio
end

#size ⇒ Object

Returns the value of attribute size.



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# File 'lib/ruby_rich/layout.rb', line 3

def size
  @size
end

#split_direction ⇒ Object (readonly)

Returns the value of attribute split_direction.



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# File 'lib/ruby_rich/layout.rb', line 4

def split_direction
  @split_direction
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/ruby_rich/layout.rb', line 3

def width
  @width
end

#x_offset ⇒ Object

Returns the value of attribute x_offset.



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# File 'lib/ruby_rich/layout.rb', line 3

def x_offset
  @x_offset
end

#y_offset ⇒ Object

Returns the value of attribute y_offset.



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# File 'lib/ruby_rich/layout.rb', line 3

def y_offset
  @y_offset
end

Instance Method Details

#[](name) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 46

def [](name)
  find_by_name(name)
end

#calculate_dimensions(terminal_width, terminal_height) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 40

def calculate_dimensions(terminal_width, terminal_height)
  @x_offset = 0
  @y_offset = 0
  calculate_node_dimensions(terminal_width, terminal_height)
end

#calculate_node_dimensions(available_width, available_height) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 136

def calculate_node_dimensions(available_width, available_height)
  # 只在未设置宽度时计算宽度
  @width ||= if @size
              [@size, available_width].min
            else
              available_width
            end

  # 只在未设置高度时计算高度
  @height ||= if @size
              [@size, available_height].min
            else
              available_height
            end

  if @content.class == RubyRich::Panel
    @content.width = @width
    @content.height = @height
  end

  return if @children.empty?

  case @split_direction
  when :row
    remaining_width = @width
    fixed_children, flexible_children = @children.partition { |c| c.size }

    fixed_children.each do |child|
      child_width = [child.size, remaining_width].min
      child.width = child_width
      remaining_width -= child_width
    end

    total_ratio = flexible_children.sum(&:ratio)
    if total_ratio > 0
      ratio_width = remaining_width.to_f / total_ratio
      flexible_children.each do |child|
        child_width = (child.ratio * ratio_width).floor
        child.width = child_width
        remaining_width -= child_width
      end

      flexible_children.last.width += remaining_width if remaining_width > 0
    end

    @children.each { |child| child.height = @height }

    current_x = @x_offset
    @children.each do |child|
      child.x_offset = current_x
      child.y_offset = @y_offset
      current_x += child.width
      child.calculate_node_dimensions(child.width, child.height)
    end

  when :column
    remaining_height = @height
    fixed_children, flexible_children = @children.partition { |c| c.size }

    fixed_children.each do |child|
      child_height = [child.size, remaining_height].min
      child.height = child_height
      remaining_height -= child_height
    end

    total_ratio = flexible_children.sum(&:ratio)
    if total_ratio > 0
      ratio_height = remaining_height.to_f / total_ratio
      flexible_children.each do |child|
        child_height = (child.ratio * ratio_height).floor
        child.height = child_height
        remaining_height -= child_height
      end

      flexible_children.last.height += remaining_height if remaining_height > 0
    end

    @children.each { |child| child.width = @width }

    current_y = @y_offset
    @children.each do |child|
      child.x_offset = @x_offset
      child.y_offset = current_y
      current_y += child.height
      child.calculate_node_dimensions(child.width, child.height)
    end
  end
end

#draw ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 74

def draw
  puts render
end

#find_by_name(name) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 50

def find_by_name(name)
  return self if @name == name
  @children.each do |child|
    result = child.find_by_name(name)
    return result if result
  end
  nil
end

#render ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 59

def render
  # 将缓冲区转换为字符串（每行用换行符连接）
  render_to_buffer.map { |line| line.compact.join("") }.join("\n")
end

#render_into(buffer) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 78

def render_into(buffer)
  children.each { |child| child.render_into(buffer) } if children
  return unless content
  content_lines = if content.is_a?(String)
                    content.split("\n")[0...height]
                  else
                    content.render[0...height]
                  end

  content_lines.each_with_index do |line, line_index|
    y_pos = y_offset + line_index
    next if y_pos >= buffer.size

    in_escape = false
    escape_char = ""
    char_width = 0 # 初始宽度调整为0，方便位置计算
    line.each_char do |char|
      # 处理ANSI转义码
      if in_escape
        escape_char += char
        in_escape = false if char == 'm'
        if escape_char=="\e[0m"
          escape_char = ""
        end
        next
      elsif char.ord == 27 # 检测到转义开始符\e
        in_escape = true
        escape_char += char
        next
      end

      # 计算字符宽度
      char_w = case char.ord
               when 0x0000..0x007F then 1 # 英文字符
               when 0x4E00..0x9FFF then 2 # 中文字符
               else Unicode::DisplayWidth.of(char)
               end
      # 计算字符的起始位置
      x_start = x_offset + char_width

      # 超出右边界则跳过
      next if x_start >= buffer[y_pos].size

      # 处理字符渲染（中文字符可能占用多个位置）
      char_w.times do |i|
        x_pos = x_start + i
        break if x_pos >= buffer[y_pos].size # 超出右边界停止
        unless escape_char.empty?
          char = escape_char + char + "\e[0m" # 每次都记录字符的实际颜色
        end
        buffer[y_pos][x_pos] = char unless i > 0 # 中文字符仅在第一个位置写入，避免覆盖
        buffer[y_pos][x_pos+1] = nil if char_w == 2
      end
      char_width += char_w # 更新累计宽度
    end
  end
end

#render_to_buffer ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 64

def render_to_buffer
  # 初始化缓冲区（二维数组，每个元素代表一个字符）
  buffer = Array.new(@height) { Array.new(@width, " ") }
  
  # 递归填充内容到缓冲区
  render_into(buffer)

  return buffer
end

#root ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 20

def root
  @parent ? @parent.root : self
end

#split_column(*layouts) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 30

def split_column(*layouts)
  @split_direction = :column
  layouts.each { |l| l.parent = self }
  @children.concat(layouts)
end

#split_row(*layouts) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 24

def split_row(*layouts)
  @split_direction = :row
  layouts.each { |l| l.parent = self }
  @children.concat(layouts)
end

#update_content(content) ⇒ Object 



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# File 'lib/ruby_rich/layout.rb', line 36

def update_content(content)
  @content = content
end