Module: Termpix::Protocols::W3m

Defined in:
lib/termpix/protocols.rb

Overview

w3mimgdisplay Protocol

Class Method Summary collapse

Class Method Details

.clear(x:, y:, width:, height:, term_width:, term_height:) ⇒ Object 



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# File 'lib/termpix/protocols.rb', line 216

def self.clear(x:, y:, width:, height:, term_width:, term_height:)
  # Clear only the image overlay in the specified area
  terminfo = `xwininfo -id $(xdotool getactivewindow 2>/dev/null) 2>/dev/null`
  return true unless terminfo && !terminfo.empty?

  w_match = terminfo.match(/Width: (\d+)/)
  h_match = terminfo.match(/Height: (\d+)/)
  return true unless w_match && h_match
  term_w = w_match[1].to_i
  term_h = h_match[1].to_i

  # Calculate character dimensions
  char_w = term_w / term_width
  char_h = term_h / term_height

  # Convert to pixel coordinates with slight margin adjustment
  img_x = (char_w * x) - char_w
  img_y = char_h * y
  img_max_w = (char_w * width) + char_w + 2
  img_max_h = char_h * height + 2

  # Use w3mimgdisplay command "6" to clear just the image area
  cmd = "6;#{img_x};#{img_y};#{img_max_w};#{img_max_h};\n4;\n3;\n"
  IO.popen([@imgdisplay], 'w', err: '/dev/null') { |io| io.write(cmd) }
  true
end

.display(image_path, x:, y:, max_width:, max_height:) ⇒ Object 



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# File 'lib/termpix/protocols.rb', line 147

def self.display(image_path, x:, y:, max_width:, max_height:)
  # Get terminal pixel dimensions
  terminfo = `xwininfo -id $(xdotool getactivewindow 2>/dev/null) 2>/dev/null`
  return unless terminfo && !terminfo.empty?

  w_match = terminfo.match(/Width: (\d+)/)
  h_match = terminfo.match(/Height: (\d+)/)
  return unless w_match && h_match
  term_w = w_match[1].to_i
  term_h = h_match[1].to_i

  # Calculate character dimensions
  cols = `tput cols`.to_i
  cols = 80 if cols <= 0
  lines = `tput lines`.to_i
  lines = 24 if lines <= 0
  char_w = term_w / cols
  char_h = term_h / lines

  # Convert to pixel coordinates
  img_x = char_w * x
  img_y = char_h * y
  img_max_w = char_w * max_width
  img_max_h = char_h * max_height

  # Check if image has EXIF orientation data before auto-orienting
  # This avoids unnecessary temp file creation for most images
  escaped = Shellwords.escape(image_path)

  # Quick check: only auto-orient if image has EXIF orientation tag
  has_orientation = `identify -format "%[EXIF:Orientation]" #{escaped}[0] 2>/dev/null`.strip

  if has_orientation && !has_orientation.empty? && has_orientation != "1"
    # Image needs rotation - create cached temp file
    require 'digest'
    file_hash = Digest::MD5.hexdigest(image_path)
    temp_file = "/tmp/termpix_#{file_hash}.jpg"

    unless File.exist?(temp_file)
      system("convert #{escaped}[0] -auto-orient #{temp_file} 2>/dev/null")
    end

    display_path = File.exist?(temp_file) ? temp_file : image_path
  else
    # No rotation needed - use original image
    display_path = image_path
  end

  dimensions = `identify -format "%wx%h" #{Shellwords.escape(display_path)}[0] 2>/dev/null`.strip
  return if dimensions.empty? || !dimensions.match?(/\A\d+x\d+\z/)

  img_w, img_h = dimensions.split('x').map(&:to_i)

  # Scale if needed - preserve aspect ratio
  if img_w > img_max_w || img_h > img_max_h
    scale_w = img_max_w.to_f / img_w
    scale_h = img_max_h.to_f / img_h
    scale = [scale_w, scale_h].min
    img_w = (img_w * scale).to_i
    img_h = (img_h * scale).to_i
  end

  # Display using w3mimgdisplay protocol
  cmd = "0;1;#{img_x};#{img_y};#{img_w};#{img_h};;;;;#{display_path}\n4;\n3;\n"
  IO.popen([@imgdisplay], 'w', err: '/dev/null') { |io| io.write(cmd) }

  # Don't delete temp file - keep it cached for performance
end