Class: Ruvi::DocumentBuffer

Inherits:
Object
  • Object
show all
Extended by:
AccessorProxier
Defined in:
lib/buffer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from AccessorProxier

proxy_accessors_to_object

Constructor Details

#initialize(app, lines = BufferLineArray.new, data = nil) ⇒ DocumentBuffer

Returns a new instance of DocumentBuffer.



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# File 'lib/buffer.rb', line 170

def initialize app, lines = BufferLineArray.new, data = nil
    if data.nil?
    @data = BufferData.new
    @data.highlight_cache = []
    @data.needs_redraw = false
    end
    @got_a_scroll_already = false
    @need_to_scroll = 0
    if data.nil?
    @data.redraw_list = []
    @data.app = app
    @data.lines = lines
    @data.fname = nil
    end
    @top   = 0
    @x, @y = 0, 0
    if data.nil?
    @data.lines_highlighted = []
    @data.fake_buffer = false
    @data.hlstacks, @data.classstacks, @data.tokens = [], [], []
    @data.dlog = EditorApp::DiffLogger::DifferenceLog.new app, self
    @data.is_paste_buffer = false
    end
    if !data.nil?
        @data = data
    end
    update_highlighter
    BufferListing::instance << self
    app.change_listeners << self.method(:notified_of_change)
end

Instance Attribute Details

#bnum ⇒ Object

Returns the value of attribute bnum.



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# File 'lib/buffer.rb', line 78

def bnum
  @bnum
end

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/buffer.rb', line 74

def data
  @data
end

#got_a_scroll_already ⇒ Object

Returns the value of attribute got_a_scroll_already.



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# File 'lib/buffer.rb', line 78

def got_a_scroll_already
  @got_a_scroll_already
end

#need_to_scroll ⇒ Object

Returns the value of attribute need_to_scroll.



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# File 'lib/buffer.rb', line 78

def need_to_scroll
  @need_to_scroll
end

#top ⇒ Object

Returns the value of attribute top.



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# File 'lib/buffer.rb', line 78

def top
  @top
end

#x ⇒ Object

Returns the value of attribute x.



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# File 'lib/buffer.rb', line 78

def x
  @x
end

#y ⇒ Object

Returns the value of attribute y.



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# File 'lib/buffer.rb', line 78

def y
  @y
end

Instance Method Details

#_invalidate_line_highlight(line_num) ⇒ Object

status_bar.render 0

@data.app.refresh_widgets
@data.app.display_cursor self



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# File 'lib/buffer.rb', line 108

def _invalidate_line_highlight line_num
    raise if line_num.nil?
    fill_to_length line_num
    @data.highlight_cache[line_num] = nil
    update_status_bar_highlight_progress unless $test_case # hack-ish!
end

#ax ⇒ Object 



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# File 'lib/buffer.rb', line 85

def ax
    @data.app.end_char_mode ? @x + 1 : @x
end

#ensure_line_highlight(y) ⇒ Object 



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# File 'lib/buffer.rb', line 114

def ensure_line_highlight y
    fill_to_length y
    pos_of_first_nil = @data.highlight_cache.index nil
    found = !pos_of_first_nil.nil?
    dbg(:dbg_highlight) { "ensure_line_highlight #{y}" }
    dbg(:hl) { "#{y} -- #{@data.highlight_cache[y].inspect} :: #{@data.lines[y].inspect}" }
    if (found and pos_of_first_nil <= y) or @data.highlight_cache[y].nil?
        pos_of_first_nil = [y, @data.highlight_cache.length].min
        # TODO - can become complex when we have multiple points of modification inside the visible screen
        (pos_of_first_nil..y).each {
           |line_num|
           tags = []
           dbg(:dbg_highlight) { "rehighlighting #{line_num}! - \"#{@data.lines[line_num]}\" from [(#{@data.lines.inspect})]" }
           state = @data.highlighter.get_highlight_state self, line_num
           @data.lines_highlighted << line_num
           @data.highlighter.highlight_line(self, @data.lines[line_num], line_num) {
              |color, bold, word|
              tags << [color, bold, word]
           }
           @data.highlight_cache[line_num] = tags
           break unless (@data.highlighter.should_continue_highlight_pass? self, line_num, state)
           update_status_bar_highlight_progress unless $test_case # hack-ish!
        }
        raise "failed to highlight requested line #{y}!" if @data.highlight_cache[y].nil?
        @data.highlight_cache[y+1] = nil
    end
end

#extend_array_to_num(arr, num) ⇒ Object 



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# File 'lib/buffer.rb', line 209

def extend_array_to_num arr, num
    diff = (num - arr.length)
    diff.times { arr << nil } if diff > 0
end

#fill_to_length(line_num) ⇒ Object 



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# File 'lib/buffer.rb', line 93

def fill_to_length line_num
    @data.highlight_cache << nil until @data.highlight_cache.length >= line_num
end

#first_non_highlighted_line ⇒ Object 



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# File 'lib/buffer.rb', line 79

def first_non_highlighted_line
    extend_array_to_num @data.hlstacks, @data.lines.length
    extend_array_to_num @data.classstacks, @data.lines.length
    extend_array_to_num @data.highlight_cache, @data.lines.length
    @data.highlight_cache.index nil
end

#fname=(val) ⇒ Object 



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# File 'lib/buffer.rb', line 205

def fname= val
    @data.fname = val
    update_highlighter
end

#invalidate_line_highlight(line_num) ⇒ Object 



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# File 'lib/buffer.rb', line 88

def invalidate_line_highlight line_num
    @data.app.mutex.synchronize {
        _invalidate_line_highlight line_num
    }
end

#iterate_line_highlight(y, line = nil) ⇒ Object 



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# File 'lib/buffer.rb', line 141

def iterate_line_highlight y, line = nil
    if line.nil?
        if y > last_line_num
           yield Curses::COLOR_WHITE, false, " "
        else
        ensure_line_highlight y
        @data.highlight_cache[y].each { 
            |tag|
            color, bold, word = *tag 
            yield color, bold, word
        }
        end
    else
        @data.highlighter.highlight_line(self, line, y) {
           |*args|
           yield *args
        }
    end
end

#last_char_on_line(y) ⇒ Object 



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# File 'lib/buffer.rb', line 163

def last_char_on_line y
    raise "invalid y == #{y}" if last_line_num > @data.lines.length
    @data.lines[y].empty? ? 0 : @data.lines[y].length - 1
end

#last_line_num ⇒ Object 



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# File 'lib/buffer.rb', line 160

def last_line_num
    @data.lines.empty? ? 0 : @data.lines.length - 1
end

#make_copy ⇒ Object 



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# File 'lib/buffer.rb', line 167

def make_copy
    self.class.new @data.app, nil, @data
end

#move_to(x, y) ⇒ Object 



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# File 'lib/buffer.rb', line 259

def move_to x, y
    buffer = self
    buffer.x = x
    if y < buffer.top
        @data.app.scroll_up(buffer)   until @data.app.line_displayed?(buffer, y)
    elsif y >= (buffer.top + @data.app.screen_height)
        @data.app.scroll_down(buffer) until @data.app.line_displayed?(buffer, y)
    end
    buffer.y = y
end

#move_to_x(x) ⇒ Object 



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# File 'lib/buffer.rb', line 269

def move_to_x x
    buffer = self
    move_to x, buffer.y
end

#move_to_y(y) ⇒ Object 



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# File 'lib/buffer.rb', line 273

def move_to_y y
    buffer = self
    move_to buffer.x, y
end

#notified_of_change(change, direction) ⇒ Object 



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# File 'lib/buffer.rb', line 213

def notified_of_change change, direction
    # TODO - optimisation: ability to cancel background thread by merging the two requests somehow
    sign = direction ? 1 : -1
    # return unless @data.highlighter.class.has_structure?
    if !change.is_a? EditorApp::DiffLogger::CursorPositionChange
        extend_array_to_num @data.hlstacks, change.line_num
        extend_array_to_num @data.classstacks, change.line_num
        extend_array_to_num @data.highlight_cache, change.line_num
    end
    case change
    when EditorApp::DiffLogger::InsertLineAfterChange
        if direction
            @data.hlstacks.insert_after change.line_num, nil
            @data.classstacks.insert_after change.line_num, nil
            @data.highlight_cache.insert_after change.line_num, nil
        else
            @data.hlstacks.delete_at change.line_num
            @data.classstacks.delete_at change.line_num
            @data.highlight_cache.delete_at change.line_num
        end
        # we invalidate the next line as thats where we insert
        invalidate_line_highlight change.line_num + 1
    when EditorApp::DiffLogger::RemoveLineChange
        if direction
            @data.hlstacks.insert_after change.line_num, nil
            @data.classstacks.insert_after change.line_num, nil
            @data.highlight_cache.insert_after change.line_num, nil
        else
            @data.hlstacks.delete_at change.line_num
            @data.classstacks.delete_at change.line_num
            @data.highlight_cache.delete_at change.line_num
        end
        # we invalidate the current line - note - what about removal of the last line in a document
        invalidate_line_highlight change.line_num
    when EditorApp::DiffLogger::ModifyLineChange 
        invalidate_line_highlight change.line_num
    when EditorApp::DiffLogger::CursorPositionChange
        ;
    else
        raise "unhandled change type!! #{change.type}"
    end
end

#out_of_bounds(y, x) ⇒ Object 



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# File 'lib/buffer.rb', line 277

def out_of_bounds y, x
    (x >= @data.lines[y].length)
end

#out_of_bounds2(y, x) ⇒ Object

TODO god this logic is ugly



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# File 'lib/buffer.rb', line 281

def out_of_bounds2 y, x
    (x > @data.lines[y].length)
end

#text ⇒ Object 



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# File 'lib/buffer.rb', line 284

def text
   (@data.lines.join "\n")
end

#update_highlighter ⇒ Object 



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# File 'lib/buffer.rb', line 200

def update_highlighter
    hls = Highlighters::instance.registered_highlighters.sort_by { |plugin| -plugin.importance }
    hl_class = hls.detect { |hler| hler.can_highlight? self }
    @data.highlighter = hl_class.nil? ? nil : hl_class.new
end

#update_status_bar_highlight_progress ⇒ Object 



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# File 'lib/buffer.rb', line 96

def update_status_bar_highlight_progress
    status_bar = @data.app.widgets.detect { |sb| (sb.is_a? StatusBar) and (sb.buffer == self) }
    return if status_bar.nil? # minor hack - FIXME
    hl_len = [@data.highlight_cache.compact.length, @data.lines.length].min
    done_ratio = (hl_len / @data.lines.length.to_f)
    status_bar.highlight_progress = (done_ratio >= 1) ? nil : done_ratio
=begin
    status_bar.render 0
    @data.app.refresh_widgets
    @data.app.display_cursor self
=end
end