Class: TextWindow

Inherits:
Curses::Window
  • Object
show all
Defined in:
lib/profanity_fe/text_window.rb

Constant Summary collapse

@@list = 
Array.new

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ TextWindow

Returns a new instance of TextWindow.



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# File 'lib/profanity_fe/text_window.rb', line 10

def initialize(*args)
	@buffer = Array.new
	@buffer_pos = 0
	@max_buffer_size = 250
	@indent_word_wrap = true
	@@list.push(self)
	super(*args)
end

Instance Attribute Details

#buffer ⇒ Object (readonly)

Returns the value of attribute buffer.



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# File 'lib/profanity_fe/text_window.rb', line 2

def buffer
  @buffer
end

#color_stack ⇒ Object (readonly)

Returns the value of attribute color_stack.



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# File 'lib/profanity_fe/text_window.rb', line 2

def color_stack
  @color_stack
end

#indent_word_wrap ⇒ Object

Returns the value of attribute indent_word_wrap.



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# File 'lib/profanity_fe/text_window.rb', line 3

def indent_word_wrap
  @indent_word_wrap
end

#layout ⇒ Object

Returns the value of attribute layout.



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# File 'lib/profanity_fe/text_window.rb', line 3

def layout
  @layout
end

#scrollbar ⇒ Object

Returns the value of attribute scrollbar.



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# File 'lib/profanity_fe/text_window.rb', line 3

def scrollbar
  @scrollbar
end

Class Method Details

.list ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 6

def TextWindow.list
	@@list
end

Instance Method Details

#add_line(line, line_colors = Array.new) ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 25

def add_line(line, line_colors=Array.new)
	part = [ 0, line.length ]
	line_colors.each { |h| part.push(h[:start]); part.push(h[:end]) }
	part.uniq!
	part.sort!
	for i in 0...(part.length-1)
		str = line[part[i]...part[i+1]]
		color_list = line_colors.find_all { |h| (h[:start] <= part[i]) and (h[:end] >= part[i+1]) }
		if color_list.empty?
			addstr str
		else
			# shortest length highlight takes precedence when multiple highlights cover the same substring
			# fixme: allow multiple highlights on a substring when one specifies fg and the other specifies bg
			color_list = color_list.sort_by { |h| h[:end] - h[:start] }
			#log("line: #{line}, list: #{color_list}")
			fg = color_list.map { |h| h[:fg] }.find { |fg| !fg.nil? }
			bg = color_list.map { |h| h[:bg] }.find { |bg| !bg.nil? }
			ul = color_list.map { |h| h[:ul] == "true" }.find { |ul| ul }
			attron(color_pair(get_color_pair_id(fg, bg))|(ul ? Curses::A_UNDERLINE : Curses::A_NORMAL)) {
				addstr str
			}
		end
	end
end

#add_string(string, string_colors = Array.new) ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 49

def add_string(string, string_colors=Array.new)
	#
	# word wrap string, split highlights if needed so each wrapped line is independent, update buffer, update window if needed
	#
	while (line = string.slice!(/^.{2,#{maxx-1}}(?=\s|$)/)) or (line = string.slice!(0,(maxx-1)))
		line_colors = Array.new
		for h in string_colors
			line_colors.push(h.dup) if (h[:start] < line.length)
			h[:end] -= line.length
			h[:start] = [(h[:start] - line.length), 0].max
		end
		string_colors.delete_if { |h| h[:end] < 0 }
		line_colors.each { |h| h[:end] = [h[:end], line.length].min }
		@buffer.unshift([line,line_colors])
		@buffer.pop if @buffer.length > @max_buffer_size
		if @buffer_pos == 0
			addstr "\n"
			add_line(line, line_colors)
		else
			@buffer_pos += 1
			scroll(1) if @buffer_pos > (@max_buffer_size - maxy)
			update_scrollbar
		end
		break if string.chomp.empty?
		if @indent_word_wrap
			if string[0,1] == ' '
				string = " #{string}"
				string_colors.each { |h|
					h[:end] += 1;
					# Never let the highlighting hang off the edge -- it looks weird
					h[:start] += h[:start] == 0 ? 2 : 1
				}
			else
				string = "  #{string}"
				string_colors.each { |h| h[:end] += 2; h[:start] += 2 }
			end
		else
			if string[0,1] == ' '
				string = string[1,string.length]
				string_colors.each { |h| h[:end] -= 1; h[:start] -= 1 }
			end
		end
	end
	if @buffer_pos == 0
		noutrefresh
	end
end

#clear_scrollbar ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 165

def clear_scrollbar
	@scrollbar_pos = nil
	@scrollbar.clear
	@scrollbar.noutrefresh
end

#max_buffer_size ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 18

def max_buffer_size
	@max_buffer_size
end

#max_buffer_size=(val) ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 21

def max_buffer_size=(val)
	# fixme: minimum size?  Curses.lines?
	@max_buffer_size = val.to_i
end

#resize_buffer ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 170

def resize_buffer
	# fixme
end

#scroll(scroll_num) ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 96

def scroll(scroll_num)
	if scroll_num < 0
		if (@buffer_pos + maxy + scroll_num.abs) >= @buffer.length
			scroll_num = 0 - (@buffer.length - @buffer_pos - maxy)
		end
		if scroll_num < 0
			@buffer_pos += scroll_num.abs
			scrl(scroll_num)
			setpos(0,0)
			pos = @buffer_pos + maxy - 1
			scroll_num.abs.times {
				add_line(@buffer[pos][0], @buffer[pos][1])
				addstr "\n"
				pos -=1
			}
			noutrefresh
		end
		update_scrollbar
	elsif scroll_num > 0
		if @buffer_pos == 0
			nil
		else
			if (@buffer_pos - scroll_num) < 0
				scroll_num = @buffer_pos
			end
			@buffer_pos -= scroll_num
			scrl(scroll_num)
			setpos(maxy - scroll_num, 0)
			pos = @buffer_pos + scroll_num - 1
			(scroll_num - 1).times {
				add_line(@buffer[pos][0], @buffer[pos][1])
				addstr "\n"
				pos -= 1
			}
			add_line(@buffer[pos][0], @buffer[pos][1])
			noutrefresh
		end
	end
	update_scrollbar
end

#update_scrollbar ⇒ Object 



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# File 'lib/profanity_fe/text_window.rb', line 136

def update_scrollbar
	if @scrollbar
		last_scrollbar_pos = @scrollbar_pos
		@scrollbar_pos = maxy - ((@buffer_pos/[(@buffer.length - maxy), 1].max.to_f) * (maxy - 1)).round - 1
		if last_scrollbar_pos
			unless last_scrollbar_pos == @scrollbar_pos
				@scrollbar.setpos(last_scrollbar_pos, 0)
				@scrollbar.addch '|'
				@scrollbar.setpos(@scrollbar_pos, 0)
				@scrollbar.attron(Curses::A_REVERSE) {
					@scrollbar.addch ' '
				}
				@scrollbar.noutrefresh
			end
		else
			for num in 0...maxy
				@scrollbar.setpos(num, 0)
				if num == @scrollbar_pos
					@scrollbar.attron(Curses::A_REVERSE) {
						@scrollbar.addch ' '
					}
				else
					@scrollbar.addch '|'
				end
			end
			@scrollbar.noutrefresh
		end
	end
end