Class: Gtk::HexEditor

Inherits:
Fixed
  • Object
show all
Defined in:
lib/gtkhex.rb

Defined Under Namespace

Modules: Group, View Classes: AutoHighlight, Highlight

Constant Summary collapse

VERSION = 
"0.2.0"
DEFAULT_FONT = 
"Monospace 12"
DEFAULT_CPL = 
32
DEFAULT_LINES = 
16
DISPLAY_BORDER = 
4
SCROLL_TIMEOUT = 
100
@@primary = 
Clipboard.get(Gdk::Selection::PRIMARY)
@@clipboard = 
Clipboard.get(Gdk::Selection::CLIPBOARD)

Instance Method Summary collapse

Constructor Details

#initialize(data = '') ⇒ HexEditor

Returns a new instance of HexEditor.



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# File 'lib/gtkhex.rb', line 73

def initialize(data = '')
    super()

    @data = data.force_encoding('binary')

    @scroll_timeout = -1
    @disp_buffer = ""
    @starting_offset = 0

    @xdisp_width = @adisp_width = 200
    @xdisp_gc = @adisp_gc = nil
    @active_view = View::HEX
    @group_type = Group::BYTE
    @lines = @vis_lines = @top_line = @cpl = 0
    @cursor_pos = 0
    @lower_nibble = false
    @cursor_shown = false
    @button = 0
    @insert = false
    @selecting = false

    @selection = Highlight.new
    @selection.start = @selection.end = 0
    @selection.style = nil
    @selection.min_select = 1
    @selection.valid = false

    @highlights = [ @selection ]

    @auto_highlight = nil

    @disp_font_metrics = load_font DEFAULT_FONT
    @font_desc = Pango::FontDescription.new DEFAULT_FONT

    @char_width = get_max_char_width(@disp_font_metrics)
    @char_height = Pango.pixels(@disp_font_metrics.ascent) + Pango.pixels(@disp_font_metrics.descent) + 2

    @show_offsets = false
    @offsets_gc = nil

    self.can_focus = true
    self.events = Gdk::Event::KEY_PRESS_MASK
    self.border_width = DISPLAY_BORDER

    mouse_handler = lambda do |widget, event|
        if event.event_type == Gdk::Event::BUTTON_RELEASE and event.button == 1
            if @scroll_timeout
                GLib::Source.remove @scroll_timeout
                @scroll_timeout = nil
                @scroll_dir = 0
            end

            @selecting = false
            Gtk.grab_remove(widget)
            @button = 0
        elsif event.event_type == Gdk::Event::BUTTON_PRESS and event.button == 1
            self.grab_focus unless self.has_focus?

            Gtk.grab_add(widget)
            @button = event.button

            focus_view = (widget == @xdisp) ? View::HEX : View::ASCII

            if @active_view == focus_view
                if @active_view == View::HEX
                    hex_to_pointer(event.x, event.y)
                else
                    ascii_to_pointer(event.x, event.y)
                end

                unless @selecting
                    @selecting = true
                    set_selection(@cursor_pos, @cursor_pos)
                end
            else
                hide_cursor
                @active_view = focus_view
                show_cursor
            end
        elsif event.event_type == Gdk::Event::BUTTON_PRESS and event.button == 2
            # TODO
        else
            @button = 0
        end
    end

    @xdisp = DrawingArea.new
    @xdisp.modify_font @font_desc
    @xlayout = @xdisp.create_pango_layout('')
    @xdisp.events =
        Gdk::Event::EXPOSURE_MASK |
        Gdk::Event::BUTTON_PRESS_MASK |
        Gdk::Event::BUTTON_RELEASE_MASK |
        Gdk::Event::BUTTON_MOTION_MASK |
        Gdk::Event::SCROLL_MASK

    @xdisp.signal_connect 'realize' do
        @xdisp_gc = Gdk::GC.new(@xdisp.window)
        @xdisp_gc.set_exposures(true)
    end

    @xdisp.signal_connect 'expose_event' do |_xdisp, event|
        imin = (event.area.y / @char_height).to_i
        imax = ((event.area.y + event.area.height) / @char_height).to_i
        imax += 1 if (event.area.y + event.area.height).to_i % @char_height != 0

        imax = [ imax, @vis_lines ].min

        render_hex_lines(imin, imax)
    end

    @xdisp.signal_connect 'scroll_event' do |_xdisp, event|
        @scrollbar.event(event)
    end

    @xdisp.signal_connect 'button_press_event' do |xdisp, event|
        mouse_handler[xdisp, event]
    end

    @xdisp.signal_connect 'button_release_event' do |xdisp, event|
        mouse_handler[xdisp, event]
    end

    @xdisp.signal_connect 'motion_notify_event' do |xdisp, event|
        _w, x, y, _m = xdisp.window.pointer

        if y < 0
            @scroll_dir = -1
        elsif y >= xdisp.allocation.height
            @scroll_dir = 1
        else
            @scroll_dir = 0
        end

        if @scroll_dir != 0
            if @scroll_timeout == nil
                @scroll_timeout = GLib::Timeout.add(SCROLL_TIMEOUT) {
                    if @scroll_dir < 0
                        set_cursor([ 0, @cursor_pos - @cpl ].max)
                    elsif @scroll_dir > 0
                        set_cursor([ @data.size - 1, @cursor_pos + @cpl ].min)
                    end

                    true
                }
                next
            end
        else
            if @scroll_timeout != nil
                GLib::Source.remove @scroll_timeout
                @scroll_timeout = nil
            end
        end

        next if event.window != xdisp.window

        hex_to_pointer(x,y) if @active_view == View::HEX and @button == 1
    end

    put @xdisp, 0, 0
    @xdisp.show

    @adisp = DrawingArea.new
    @adisp.modify_font @font_desc
    @alayout = @adisp.create_pango_layout('')
    @adisp.events =
        Gdk::Event::EXPOSURE_MASK |
        Gdk::Event::BUTTON_PRESS_MASK |
        Gdk::Event::BUTTON_RELEASE_MASK |
        Gdk::Event::BUTTON_MOTION_MASK |
        Gdk::Event::SCROLL_MASK

    @adisp.signal_connect 'realize' do
        @adisp_gc = Gdk::GC.new(@adisp.window)
        @adisp_gc.set_exposures(true)
    end

    @adisp.signal_connect 'expose_event' do |_adisp, event|
        imin = (event.area.y / @char_height).to_i
        imax = ((event.area.y + event.area.height) / @char_height).to_i
        imax += 1 if (event.area.y + event.area.height).to_i % @char_height != 0

        imax = [ imax, @vis_lines ].min
        render_ascii_lines(imin, imax)
    end

    @adisp.signal_connect 'scroll_event' do |_adisp, event|
        @scrollbar.event(event)
    end

    @adisp.signal_connect 'button_press_event' do |adisp, event|
        mouse_handler[adisp, event]
    end

    @adisp.signal_connect 'button_release_event' do |adisp, event|
        mouse_handler[adisp, event]
    end

    @adisp.signal_connect 'motion_notify_event' do |adisp, event|
        _w, x, y, _m = adisp.window.pointer

        if y < 0
            @scroll_dir = -1
        elsif y >= adisp.allocation.height
            @scroll_dir = 1
        else
            @scroll_dir = 0
        end

        if @scroll_dir != 0
            if @scroll_timeout == nil
                @scroll_timeout = GLib::Timeout.add(SCROLL_TIMEOUT) {
                    if @scroll_dir < 0
                        set_cursor([ 0, @cursor_pos - @cpl ].max)
                    elsif @scroll_dir > 0
                        set_cursor([ @data.size - 1, @cursor_pos + @cpl ].min)
                    end

                    true
                }
                next
            end
        else
            if @scroll_timeout != nil
                GLib::Source.remove @scroll_timeout
                @scroll_timeout = nil
            end
        end

        next if event.window != adisp.window

        ascii_to_pointer(x,y) if @active_view == View::ASCII and @button == 1
    end

    put @adisp, 0, 0
    @adisp.show

    @adj = Gtk::Adjustment.new(0, 0, 0, 0, 0, 0)
    @scrollbar = Gtk::VScrollbar.new(@adj)
    @adj.signal_connect 'value_changed' do |adj|
        unless @xdisp_gc.nil? or @adisp_gc.nil? or not @xdisp.drawable? or not @adisp.drawable?
            source_min = (adj.value.to_i - @top_line) * @char_height
            source_max = source_min + @xdisp.allocation.height
            dest_min = 0
            dest_max = @xdisp.allocation.height

            rect = Gdk::Rectangle.new(0, 0, 0, 0)
            @top_line = adj.value.to_i
            if source_min < 0
                rect.y = 0
                rect.height = -source_min
                rect_height = [ rect.height, @xdisp.allocation.height ].min
                source_min = 0
                dest_min = rect.height
            else
                rect.y = 2 * @xdisp.allocation.height - source_max
                rect.y = 0 if rect.y < 0
                rect.height = @xdisp.allocation.height - rect.y
                source_max = @xdisp.allocation.height
                dest_max = rect.y
            end

            if source_min != source_max
                @xdisp.window.draw_drawable(
                    @xdisp_gc,
                    @xdisp.window,
                    0, source_min,
                    0, dest_min,
                    @xdisp.allocation.width,
                    source_max - source_min
                )
                @adisp.window.draw_drawable(
                    @adisp_gc,
                    @adisp.window,
                    0, source_min,
                    0, dest_min,
                    @adisp.allocation.width,
                    source_max - source_min
                )

                if @offsets
                    if @offsets_gc.nil?
                        @offsets_gc = Gdk::GC.new(@offsets.window)
                        @offsets_gc.set_exposures(true)
                    end

                    @offsets.window.draw_drawable(
                        @offsets_gc,
                        @offsets.window,
                        0, source_min,
                        0, dest_min,
                        @offsets.allocation.width,
                        source_max - source_min
                    )
                end

                # TODO update_all_auto_highlights(true, true)
                invalidate_all_highlights

                rect.width = @xdisp.allocation.width
                @xdisp.window.invalidate(rect, false)
                rect.width = @adisp.allocation.width
                @adisp.window.invalidate(rect, false)

                if @offsets
                    rect.width = @offsets.allocation.width
                    @offsets.window.invalidate(rect, false)
                end
            end
        end
    end

    put @scrollbar, 0, 0
    @scrollbar.show
end

Instance Method Details

#clear_selection ⇒ Object 



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# File 'lib/gtkhex.rb', line 430

def clear_selection
    set_selection(0, 0)
end

#cursor ⇒ Object 



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# File 'lib/gtkhex.rb', line 434

def cursor
    @cursor_pos
end

#get_selection ⇒ Object 



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# File 'lib/gtkhex.rb', line 426

def get_selection
    [ @selection.start, @selection.end ].sort
end

#invalidate_all_highlights ⇒ Object 



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# File 'lib/gtkhex.rb', line 558

def invalidate_all_highlights
    @highlights.each do |hl| invalidate_highlight(hl) end
end

#invalidate_highlight(hl) ⇒ Object 



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# File 'lib/gtkhex.rb', line 554

def invalidate_highlight(hl)
    hl.valid = false
end

#set_cursor(index) ⇒ Object 



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# File 'lib/gtkhex.rb', line 438

def set_cursor(index)
    return if index < 0 or index > @data.size

    old_pos = @cursor_pos
    index -= 1 if @insert and index == @data.size
    index = [ 0, index ].max

    hide_cursor

    @cursor_pos = index
    return if @cpl == 0

    y = index / @cpl
    if y >= @top_line + @vis_lines
        @adj.value = [ y - @vis_lines + 1, @lines - @vis_lines ].min
        @adj.value = [ 0, @adj.value ].max
        @adj.signal_emit 'value_changed'
    elsif y < @top_line
        @adj.value = y
        @adj.signal_emit 'value_changed'
    end

    @lower_nibble = false if index == @data.size

    if @selecting
        set_selection(@selection.start, @cursor_pos)
        bytes_changed(*[@cursor_pos, old_pos].sort)
    else# @selection.start != @selection.end
        s, e = [@selection.start, @selection.end].sort
        @selection.end = @selection.start = @cursor_pos
        bytes_changed(s, e)
    end

    self.signal_emit 'cursor_moved'

    bytes_changed(old_pos, old_pos)
    show_cursor
end

#set_cursor_on_lower_nibble(bool) ⇒ Object 



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# File 'lib/gtkhex.rb', line 484

def set_cursor_on_lower_nibble(bool)
    if @selecting
        bytes_changed(@cursor_pos, @cursor_pos)
        @lower_nibble = bool
    elsif @selection.start != @selection.end
        s, e = [ @selection.start, @selection.end ].sort

        @selection.start = @selection.end = 0
        bytes_changed(s, e)
        @lower_nibble = bool
    else
        hide_cursor
        @lower_nibble = bool
        show_cursor
    end
end

#set_cursor_xy(x, y) ⇒ Object 



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# File 'lib/gtkhex.rb', line 477

def set_cursor_xy(x, y)
    pos = y.to_i * @cpl + x.to_i
    return if y < 0 or y >= @lines or x < 0 or x >= @cpl or pos > @data.size

    set_cursor(pos)
end

#set_data(data) ⇒ Object 



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# File 'lib/gtkhex.rb', line 535

def set_data(data)
    prev_data_size = @data.size
    @data = data.dup

    recalc_displays(self.allocation.width, self.allocation.height)

    set_cursor 0
    bytes_changed(0, [ prev_data_size, @data.size ].max)
    redraw_widget
end

#set_font(fontname) ⇒ Object 



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# File 'lib/gtkhex.rb', line 520

def set_font(fontname)
    @font_desc = Pango::FontDescription.new(fontname)
    @disp_font_metrics = load_font(fontname)

    @xdisp.modify_font(@font_desc) if @xdisp
    @adisp.modify_font(@font_desc) if @adisp
    @offsets.modify_font(@font_desc) if @offsets

    @char_width = get_max_char_width(@disp_font_metrics)
    @char_height = Pango.pixels(@disp_font_metrics.ascent) + Pango.pixels(@disp_font_metrics.descent) + 2
    recalc_displays(self.allocation.width, self.allocation.height)

    redraw_widget
end

#set_group_type(type) ⇒ Object 



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# File 'lib/gtkhex.rb', line 501

def set_group_type(type)
    hide_cursor
    @group_type = type
    recalc_displays(self.allocation.width, self.allocation.height)
    self.queue_resize
    show_cursor
end

#set_selection(s, e) ⇒ Object 



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# File 'lib/gtkhex.rb', line 389

def set_selection(s, e)
    e = [ e, @data.size ].min

    @@primary.clear if @selection.start != @selection.end

    os, oe = [ @selection.start, @selection.end ].sort

    @selection.start = [ 0, s ].max
    @selection.start = [ @selection.start, @data.size ].min
    @selection.end = [ e, @data.size ].min

    invalidate_highlight(@selection)

    ns, ne = [ @selection.start, @selection.end ].sort

    if ns != os and ne != oe
        bytes_changed([ns, os].min, [ne, oe].max)
    elsif ne != oe
        bytes_changed(*[ne, oe].sort)
    elsif ns != os
        bytes_changed(*[ns, os].sort)
    end

    if @selection.start != @selection.end
        if @active_view == View::HEX
            brk_len = 2 * @cpl + @cpl / @group_type
            format_xblock(s,e)
            (@disp_buffer.size / brk_len + 1).times do |i| @disp_buffer.insert(i * (brk_len + 1), $/) end
        else
            brk_len = @cpl
            format_ablock(s,e)
        end

        @@primary.set_text(@disp_buffer)
    end
end

#show_offsets(bool) ⇒ Object 



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# File 'lib/gtkhex.rb', line 509

def show_offsets(bool)
    return unless @show_offsets ^ bool

    @show_offsets = bool
    if bool
        show_offsets_widget
    else
        hide_offsets_widget
    end
end

#validate_highlight(hl) ⇒ Object 



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# File 'lib/gtkhex.rb', line 546

def validate_highlight(hl)
    unless hl.valid
        hl.start_line = [ hl.start, hl.end ].min / @cpl - @top_line
        hl.end_line = [ hl.start, hl.end ].max / @cpl - @top_line
        hl.valid = true
    end
end