Class: Zoom::Cache

Inherits:
Object
  • Object
show all
Defined in:
lib/zoom/cache.rb

Defined Under Namespace

Classes: Result

Instance Method Summary collapse

Constructor Details

#initialize(config, file = nil) ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/zoom/cache.rb', line 77

def initialize(config, file = nil)
    file = "~/.cache/zoom/cache" if (file.nil?)

    @cache_file = Pathname.new(file).expand_path
    @config = config
    @results = nil
    @thread = nil
    @header = Hash.new

    FileUtils.mkdir_p(@cache_file.dirname)
    read
end

Instance Method Details

#args ⇒ Object 



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# File 'lib/zoom/cache.rb', line 6

def args
    return nil if (@header.nil?)
    return @header["args"]
end

#available_tags ⇒ Object 



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# File 'lib/zoom/cache.rb', line 11

def available_tags
    return (1..get_results.length).to_a
end

#clear ⇒ Object 



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# File 'lib/zoom/cache.rb', line 15

def clear
    # Kill thread first since it was using the file
    @thread.kill if (@thread)
    @thread = nil

    # Delete cache file and reset header and results
    @cache_file.delete if (@cache_file.exist?)
    @header = nil
    @results = nil
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zoom/cache.rb', line 26

def empty?
    read if (@thread.nil?)
    return true if (@thread.nil?)
    while (@thread.alive? && (@header.nil? || @header.empty?))
        sleep 0.1
    end
    return @header.empty?
end

#get_results(tags = nil) ⇒ Object 



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# File 'lib/zoom/cache.rb', line 35

def get_results(tags = nil)
    if (tags.nil?)
        begin
            @thread.join if (@thread)
        rescue Interrupt
            puts
        end
        return Array.new if (empty?)
        return @results
    end

    results = Array.new
    parse_tags(tags).each do |tag|
        raise Zoom::Error::InvalidTag.new(tag) if (@thread.nil?)

        while ((tag > @results.length) && @thread.alive?)
            sleep 0.1
        end

        if (tag > @results.length)
            raise Zoom::Error::InvalidTag.new(tag)
        end

        results.push(@results.at(tag - 1))
    end

    return results
end

#header(header = nil) ⇒ Object 



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# File 'lib/zoom/cache.rb', line 64

def header(header = nil)
    return nil if (header.nil? && empty?)
    return @header if (header.nil?)

    # This causes the cache to be "empty" so don't do it! Leaving
    # this here so I don't forget.
    # @header = header

    File.open(@cache_file, "a") do |f|
        f.write("ZOOM_HEADER=#{JSON.generate(header)}\n")
    end
end

#paths ⇒ Object 



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# File 'lib/zoom/cache.rb', line 113

def paths
    return nil if (@header.nil?)
    return @header["paths"]
end

#profile_name ⇒ Object 



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# File 'lib/zoom/cache.rb', line 118

def profile_name
    return nil if (@header.nil?)
    return @header["profile_name"]
end

#pwd ⇒ Object 



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# File 'lib/zoom/cache.rb', line 123

def pwd
    return nil if (@header.nil?)
    return @header["pwd"]
end

#read ⇒ Object 



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# File 'lib/zoom/cache.rb', line 128

def read
    return if (!@cache_file.exist?)

    @results = Array.new
    tag = 1
    @thread.kill if (@thread)
    @thread = Thread.new do
        profile = nil

        # Read in cache
        File.open(@cache_file) do |cache|
            cache.each do |line|
                line.chomp!
                if (line.start_with?("ZOOM_HEADER="))
                    @header = JSON.parse(
                        line.gsub("ZOOM_HEADER=", "")
                    )

                    if (!@config.has_profile?(profile_name))
                        raise
                        Zoom::Error::ProfileDoesNotExist.new(
                            profile_name
                        )
                    end
                    profile = @config.get_profile(profile_name)
                elsif (line.match(/^-?-?$/))
                    # Ignore dividers when searching with context
                    # and empty lines
                else
                    @results.push(
                        Zoom::Cache::Result.new(
                            tag,
                            line,
                            self,
                            profile.grep_like_tags?
                        )
                    )
                    tag += 1
                end
            end
        end
    end
end

#regex ⇒ Object 



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# File 'lib/zoom/cache.rb', line 172

def regex
    return nil if (@header.nil?)
    return @header["regex"]
end

#shortcut ⇒ Object 



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# File 'lib/zoom/cache.rb', line 177

def shortcut
    return if (empty?)

    @config.validate_colors
    if (!@config.has_profile?(profile_name))
        raise Zoom::Error::ProfileDoesNotExist.new(profile_name)
    end

    profile = @config.get_profile(profile_name)
    if (!profile.taggable)
        get_results.each do |result|
            puts(result.contents)
        end
        return
    end

    curr_filename = nil
    get_results.each do |result|
        if (result.grep_like?)
            if (result.filename != curr_filename)
                puts if (curr_filename)
                puts(@config.hilight_filename(result.filename))
                curr_filename = result.filename
            end

            puts(
                [
                    @config.hilight_tag("[#{result.tag}]"),
                    "#{@config.hilight_lineno(result.lineno)}:",
                    result.match.gsub(
                        /(#{regex})/i,
                        @config.hilight_match("\\1")
                    )
                ].join(" ")
            )
        else
            if (result.filename)
                if (result.filename != curr_filename)
                    puts if (curr_filename)
                    puts(
                        @config.hilight_filename(result.filename)
                    )
                    curr_filename = result.filename
                end
            end

            tag = result.tag
            line = result.contents
            puts(
                [
                    @config.hilight_tag("[#{tag}]"),
                    line
                ].join(" ")
            )
        end
    end
end

#write(str, r = nil) ⇒ Object 



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# File 'lib/zoom/cache.rb', line 235

def write(str, r = nil)
    return if (str.nil?)

    if (!str.valid_encoding?)
        str = str.encode(
            "UTF-16be",
            :invalid => :replace,
            :replace => "?"
        ).encode("UTF-8")
    end

    File.open(@cache_file, "a") do |f|
        str.gsub(/\r/, "^M").split("\n").each do |line|
            if (r && line.match(/^[^:]+:[0-9]+:.+$/))
                line.match(/^([^:]+:[0-9]+:)(.+)$/) do |m|
                    m[2].scan(
                        /(.{0,128}#{r}.{0,128})/i
                    ) do |n|
                        f.write("#{m[1]}#{n[0]}\n")
                    end
                end
            else
                line.gsub!(/^(.{128}).*(.{128})$/, "\\1...\\2")
                f.write("#{line}\n")
            end
        end
    end
end