Class: MarkupStyleRender

Inherits:
Object
  • Object
show all
Defined in:
lib/Parsers/MarkupStyleRender.rb

Defined Under Namespace

Classes: TagChar, TextChar

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(paragraph) ⇒ MarkupStyleRender

Returns a new instance of MarkupStyleRender.



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# File 'lib/Parsers/MarkupStyleRender.rb', line 29

def initialize(paragraph)
    @paragraph = paragraph

    chars = {}
    index = 0
    
    paragraph.text.each_char do |char|
        chars[index] = TextChar.new([char], "Text")
        index += 1
        if char.bytes.length >= 4
            # some emoji need more space (in Medium)
            chars[index] = TextChar.new([], "Text")
            index += 1
        end
    end
    
    @chars = chars
end

Instance Attribute Details

#chars ⇒ Object

Returns the value of attribute chars.



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# File 'lib/Parsers/MarkupStyleRender.rb', line 7

def chars
  @chars
end

#encodeType ⇒ Object

Returns the value of attribute encodeType.



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# File 'lib/Parsers/MarkupStyleRender.rb', line 7

def encodeType
  @encodeType
end

#paragraph ⇒ Object

Returns the value of attribute paragraph.



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# File 'lib/Parsers/MarkupStyleRender.rb', line 7

def paragraph
  @paragraph
end

Instance Method Details

#optimize(chars) ⇒ Object 



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# File 'lib/Parsers/MarkupStyleRender.rb', line 48

def optimize(chars) 
    while true
        hasExcute = false
        
        index = 0
        startTagIndex = nil
        preTag = nil
        preTagIndex = nil
        preTextChar = nil
        preTextIndex = nil
        chars.each do |char|

            if !preTag.nil?
                if preTag.type == "TagStart" && char.type == "TagEnd"
                    chars.delete_at(index)
                    chars.delete_at(preTagIndex)
                    hasExcute = true
                    break
                end
            end
            
            if char.type == "TagStart" && (preTag == nil || preTag.type == "TagEnd" || preTag.type == "Text")
                startTagIndex = index
            elsif (char.type  == "TagEnd" || char.type  == "Text") && startTagIndex != nil
                if preTextChar != nil && preTextChar.chars.join() != "\n"
                    # not first tag & insert blank between start tag and before text
                    if preTextChar.chars.join() != " "
                        chars.insert(startTagIndex, TextChar.new(" ".chars, "Text"))
                        hasExcute = true
                        break
                    end
                end
                startTagIndex = nil
            end

            if !preTag.nil?
                if preTag.type == "TagStart" && char.type  == "Text"
                    # delete blank between start tag and after text
                    if char.chars.join().strip == ""
                        chars.delete_at(index)
                        hasExcute = true
                        break
                    end
                end

                if preTag.type == "Text" && char.type  == "TagEnd"
                    if preTextChar.chars.join().strip == "" && preTextChar.chars.join() != "\n"
                        chars.delete_at(preTextIndex)
                        hasExcute = true
                        break
                    end
                end

                if preTag.type == "TagEnd" && char.type  == "Text"
                    if char.chars.join() != " "
                        chars.insert(index, TextChar.new(" ".chars, "Text"))
                        hasExcute = true
                        break
                    end
                end

            end

            if char.type == "Text"
                preTextChar = char
                preTextIndex = index
            end
            
            preTag = char
            preTagIndex = index

            index += 1
        end
        
        if !hasExcute
            break
        end
    end

    chars
end

#parse ⇒ Object 



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# File 'lib/Parsers/MarkupStyleRender.rb', line 130

def parse()
    result = paragraph.text

    if !paragraph.markups.nil? && paragraph.markups.length > 0
        
        tags = []
        paragraph.markups.each do |markup|
            tag = nil
            if markup.type == "EM"
                tag = TagChar.new(2, markup.start, markup.end, "_", "_")
            elsif markup.type == "CODE"
                tag = TagChar.new(3, markup.start, markup.end, "`", "`")
            elsif markup.type == "STRONG"
                tag = TagChar.new(2, markup.start, markup.end, "**", "**")
            elsif markup.type == "A"
                url = markup.href
                if markup.anchorType == "LINK"
                    url = markup.href
                elsif markup.anchorType == "USER"
                    url = "https://medium.com/u/#{markup.userId}"
                end
                
                tag = TagChar.new(1, markup.start, markup.end, "[", "](#{url})")
            else
                Helper.makeWarningText("Undefined Markup Type: #{markup.type}.")
            end

            if !tag.nil?
                tags.append(tag)
            end
        end

        tags.sort_by(&:startIndex)

        response = []
        stack = []

        chars.each do |index, char|

            if char.chars.join() == "\n"
                brStack = stack.dup
                while brStack.length > 0
                    tag = brStack.pop
                    response.push(tag.endChars)
                end
                response.append(TextChar.new(char.chars, 'Text'))
                brStack = stack.dup.reverse
                while brStack.length > 0
                    tag = brStack.pop
                    response.push(tag.startChars)
                end
            end

            startTags = tags.select { |tag| tag.startIndex == index }.sort_by(&:sort)
            if !startTags.nil?
                startTags.each do |tag|
                    response.append(tag.startChars)
                    stack.append(tag)
                end
            end

            if char.chars.join() != "\n"
                response.append(TextChar.new(char.chars, 'Text'))
            end

            endTags = tags.select { |tag| tag.endIndex == index }
            if !endTags.nil? && endTags.length > 0
                mismatchTags = []
                while endTags.length > 0
                    stackTag = stack.pop
                    stackTagInEndTagsIndex = endTags.find_index(stackTag)
                    if !stackTagInEndTagsIndex.nil?
                        # as expected
                        endTags.delete_at(stackTagInEndTagsIndex)
                    else
                        mismatchTags.append(stackTag)
                    end
                    response.append(stackTag.endChars)
                end

                while mismatchTags.length > 0
                    mismatchTag = mismatchTags.pop
                    response.append(mismatchTag.startChars)
                    stack.append(mismatchTag)
                end
            end
        end

        while stack.length > 0
            tag = stack.pop
            response.push(tag.endChars)
        end
        
        response = optimize(response)
        result = response.map{ |response| response.chars }.join()
    end

    result
end