class Magick::ImageList
Attributes
Public Class Methods
Initialize new instances
# File lib/rmagick_internal.rb, line 1558 def initialize(*filenames, &block) @images = [] @scene = nil filenames.each do |f| Magick::Image.read(f, &block).each { |n| @images << n } end @scene = length - 1 if length > 0 # last image in array end
Public Instance Methods
# File lib/rmagick_internal.rb, line 1335 def *(other) Kernel.raise ArgumentError, "Integer required (#{other.class} given)" unless other.is_a? Integer current = get_current ilist = self.class.new (@images * other).each { |image| ilist << image } ilist.set_current current ilist end
# File lib/rmagick_internal.rb, line 1344 def <<(obj) assert_image obj @images << obj @scene = @images.length - 1 self end
Compare ImageLists Compare each image in turn until the result of a comparison is not 0. If all comparisons return 0, then
return if A.scene != B.scene return A.length <=> B.length
# File lib/rmagick_internal.rb, line 1356 def <=>(other) Kernel.raise TypeError, "#{self.class} required (#{other.class} given)" unless other.is_a? self.class size = [length, other.length].min size.times do |x| r = self[x] <=> other[x] return r unless r.zero? end return 0 if @scene.nil? && other.scene.nil? Kernel.raise TypeError, "cannot convert nil into #{other.scene.class}" if @scene.nil? && !other.scene.nil? Kernel.raise TypeError, "cannot convert nil into #{scene.class}" if !@scene.nil? && other.scene.nil? r = scene <=> other.scene return r unless r.zero? length <=> other.length end
# File lib/rmagick_internal.rb, line 1373 def [](*args) a = @images[*args] if a.respond_to?(:each) ilist = self.class.new a.each { |image| ilist << image } a = ilist end a end
# File lib/rmagick_internal.rb, line 1383 def []=(*args) obj = @images.[]=(*args) if obj && obj.respond_to?(:each) assert_image_array(obj) set_current obj.last.__id__ elsif obj assert_image(obj) set_current obj.__id__ else set_current nil end end
Ensure respond_to? answers correctly when we are delegating to Image
# File lib/rmagick_internal.rb, line 1408 def clear @scene = nil @images.clear end
# File lib/rmagick_internal.rb, line 1413 def clone ditto = dup ditto.freeze if frozen? ditto end
override Enumerable#collect
# File lib/rmagick_internal.rb, line 1420 def collect(&block) current = get_current a = @images.map(&block) ilist = self.class.new a.each { |image| ilist << image } ilist.set_current current ilist end
# File lib/rmagick_internal.rb, line 1429 def collect!(&block) @images.map!(&block) assert_image_array @images self end
# File lib/rmagick_internal.rb, line 1458 def compact current = get_current ilist = self.class.new a = @images.compact a.each { |image| ilist << image } ilist.set_current current ilist end
# File lib/rmagick_internal.rb, line 1467 def compact! current = get_current a = @images.compact! # returns nil if no changes were made set_current current a.nil? ? nil : self end
# File lib/rmagick_internal.rb, line 1474 def concat(other) assert_image_array other other.each { |image| @images << image } @scene = length - 1 self end
Make a deep copy
# File lib/rmagick_internal.rb, line 1436 def copy ditto = self.class.new @images.each { |f| ditto << f.copy } ditto.scene = @scene ditto end
Return the current image
# File lib/rmagick_internal.rb, line 1444 def cur_image Kernel.raise IndexError, 'no images in this list' unless @scene @images[@scene] end
Set same delay for all images
# File lib/rmagick_internal.rb, line 1482 def delay=(d) raise ArgumentError, 'delay must be greater than or equal to 0' if Integer(d) < 0 @images.each { |f| f.delay = Integer(d) } end
# File lib/rmagick_internal.rb, line 1488 def delete(obj, &block) assert_image obj current = get_current a = @images.delete(obj, &block) set_current current a end
# File lib/rmagick_internal.rb, line 1496 def delete_at(ndx) current = get_current a = @images.delete_at(ndx) set_current current a end
# File lib/rmagick_internal.rb, line 1503 def delete_if(&block) current = get_current @images.delete_if(&block) set_current current self end
# File lib/rmagick_internal.rb, line 1510 def dup ditto = self.class.new @images.each { |img| ditto << img } ditto.scene = @scene ditto end
# File lib/rmagick_internal.rb, line 1517 def eql?(other) assert_image_array other eql = other.eql?(@images) begin # "other" is another ImageList eql &&= @scene == other.scene rescue NoMethodError # "other" is a plain Array end eql end
# File lib/rmagick_internal.rb, line 1528 def fill(*args, &block) assert_image args[0] unless block_given? current = get_current @images.fill(*args, &block) assert_image_array self set_current current self end
Override Enumerable’s find_all
# File lib/rmagick_internal.rb, line 1538 def find_all(&block) current = get_current a = @images.select(&block) ilist = self.class.new a.each { |image| ilist << image } ilist.set_current current ilist end
# File lib/rmagick_internal.rb, line 1548 def from_blob(*blobs, &block) Kernel.raise ArgumentError, 'no blobs given' if blobs.length.zero? blobs.each do |b| Magick::Image.from_blob(b, &block).each { |n| @images << n } end @scene = length - 1 self end
# File lib/rmagick_internal.rb, line 1568 def insert(index, *args) args.each { |image| assert_image image } current = get_current @images.insert(index, *args) set_current current self end
Call inspect for all the images
# File lib/rmagick_internal.rb, line 1577 def inspect img = [] @images.each { |image| img << image.inspect } img = '[' + img.join(",\n") + "]\nscene=#{@scene}" end
Set the number of iterations of an animated GIF
# File lib/rmagick_internal.rb, line 1584 def iterations=(n) n = Integer(n) Kernel.raise ArgumentError, 'iterations must be between 0 and 65535' if n < 0 || n > 65_535 @images.each { |f| f.iterations = n } end
# File lib/rmagick_internal.rb, line 1590 def last(*args) if args.length.zero? a = @images.last else a = @images.last(*args) ilist = self.class.new a.each { |img| ilist << img } @scene = a.length - 1 a = ilist end a end
Custom marshal/unmarshal for Ruby 1.8.
# File lib/rmagick_internal.rb, line 1604 def marshal_dump ary = [@scene] @images.each { |i| ary << Marshal.dump(i) } ary end
# File lib/rmagick_internal.rb, line 1610 def marshal_load(ary) @scene = ary.shift @images = [] ary.each { |a| @images << Marshal.load(a) } end
The ImageList
class supports the Magick::Image
class methods by simply sending the method to the current image. If the method isn’t explicitly supported, send it to the current image in the array. If there are no images, send it up the line. Catch a NameError and emit a useful message.
# File lib/rmagick_internal.rb, line 1620 def method_missing(meth_id, *args, &block) if @scene @images[@scene].send(meth_id, *args, &block) else super end rescue NoMethodError Kernel.raise NoMethodError, "undefined method `#{meth_id.id2name}' for #{self.class}" rescue Exception $ERROR_POSITION.delete_if { |s| /:in `send'$/.match(s) || /:in `method_missing'$/.match(s) } Kernel.raise end
Create a new image and add it to the end
# File lib/rmagick_internal.rb, line 1634 def new_image(cols, rows, *fill, &info_blk) self << Magick::Image.new(cols, rows, *fill, &info_blk) end
# File lib/rmagick_internal.rb, line 1638 def partition(&block) a = @images.partition(&block) t = self.class.new a[0].each { |img| t << img } t.set_current nil f = self.class.new a[1].each { |img| f << img } f.set_current nil [t, f] end
Ping files and concatenate the new images
# File lib/rmagick_internal.rb, line 1650 def ping(*files, &block) Kernel.raise ArgumentError, 'no files given' if files.length.zero? files.each do |f| Magick::Image.ping(f, &block).each { |n| @images << n } end @scene = length - 1 self end
# File lib/rmagick_internal.rb, line 1659 def pop current = get_current a = @images.pop # can return nil set_current current a end
# File lib/rmagick_internal.rb, line 1666 def push(*objs) objs.each do |image| assert_image image @images << image end @scene = length - 1 self end
Read files and concatenate the new images
# File lib/rmagick_internal.rb, line 1676 def read(*files, &block) Kernel.raise ArgumentError, 'no files given' if files.length.zero? files.each do |f| Magick::Image.read(f, &block).each { |n| @images << n } end @scene = length - 1 self end
override Enumerable’s reject
# File lib/rmagick_internal.rb, line 1686 def reject(&block) current = get_current ilist = self.class.new a = @images.reject(&block) a.each { |image| ilist << image } ilist.set_current current ilist end
# File lib/rmagick_internal.rb, line 1695 def reject!(&block) current = get_current a = @images.reject!(&block) @images = a unless a.nil? set_current current a.nil? ? nil : self end
# File lib/rmagick_internal.rb, line 1703 def replace(other) assert_image_array other current = get_current @images.clear other.each { |image| @images << image } @scene = length.zero? ? nil : 0 set_current current self end
# File lib/rmagick_internal.rb, line 1715 def respond_to?(meth_id, priv = false) return true if __respond_to__?(meth_id, priv) if @scene @images[@scene].respond_to?(meth_id, priv) else super end end
# File lib/rmagick_internal.rb, line 1725 def reverse current = get_current a = self.class.new @images.reverse_each { |image| a << image } a.set_current current a end
# File lib/rmagick_internal.rb, line 1733 def reverse! current = get_current @images.reverse! set_current current self end
# File lib/rmagick_internal.rb, line 1740 def reverse_each @images.reverse_each { |image| yield(image) } self end
Allow scene to be set to nil
# File lib/rmagick_internal.rb, line 1299 def scene=(n) if n.nil? Kernel.raise IndexError, 'scene number out of bounds' unless @images.length.zero? @scene = nil return elsif @images.length.zero? Kernel.raise IndexError, 'scene number out of bounds' end n = Integer(n) Kernel.raise IndexError, 'scene number out of bounds' if n < 0 || n > length - 1 @scene = n end
# File lib/rmagick_internal.rb, line 1745 def shift current = get_current a = @images.shift set_current current a end
# File lib/rmagick_internal.rb, line 1752 def slice(*args) slice = @images.slice(*args) if slice ilist = self.class.new if slice.respond_to?(:each) slice.each { |image| ilist << image } else ilist << slice end else ilist = nil end ilist end
# File lib/rmagick_internal.rb, line 1767 def slice!(*args) current = get_current a = @images.slice!(*args) set_current current a end
# File lib/rmagick_internal.rb, line 1774 def ticks_per_second=(t) Kernel.raise ArgumentError, 'ticks_per_second must be greater than or equal to 0' if Integer(t) < 0 @images.each { |f| f.ticks_per_second = Integer(t) } end
# File lib/rmagick_internal.rb, line 1779 def to_a a = [] @images.each { |image| a << image } a end
# File lib/rmagick_internal.rb, line 1785 def uniq current = get_current a = self.class.new @images.uniq.each { |image| a << image } a.set_current current a end
# File lib/rmagick_internal.rb, line 1793 def uniq!(*_args) current = get_current a = @images.uniq! set_current current a.nil? ? nil : self end
@scene -> new object
# File lib/rmagick_internal.rb, line 1801 def unshift(obj) assert_image obj @images.unshift(obj) @scene = 0 self end
Protected Instance Methods
# File lib/rmagick_internal.rb, line 1264 def assert_image(obj) Kernel.raise ArgumentError, "Magick::Image required (#{obj.class} given)" unless obj.is_a? Magick::Image end
Ensure array is always an array of Magick::Image
objects
# File lib/rmagick_internal.rb, line 1269 def assert_image_array(ary) Kernel.raise ArgumentError, "Magick::ImageList or array of Magick::Images required (#{ary.class} given)" unless ary.respond_to? :each ary.each { |obj| assert_image obj } end
Find old current image, update scene number current is the id of the old current image.
# File lib/rmagick_internal.rb, line 1276 def set_current(current) if length.zero? self.scene = nil return # Don't bother looking for current image elsif scene.nil? || scene >= length self.scene = length - 1 return elsif !current.nil? # Find last instance of "current" in the list. # If "current" isn't in the list, set current to last image. self.scene = length - 1 each_with_index do |f, i| self.scene = i if f.__id__ == current end return end self.scene = length - 1 end
Private Instance Methods
# File lib/rmagick_internal.rb, line 1256 def get_current @images[@scene].__id__ rescue StandardError nil end