Class: Zoom::Cache

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

Defined Under Namespace

Classes: Result

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file = nil) ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/zoom/cache.rb', line 72

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

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

    FileUtils.mkdir_p(@cache_file.dirname)
    read
end

Instance Attribute Details

#header(header = nil) ⇒ Object (readonly)

Returns the value of attribute header.



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

def header
  @header
end

Instance Method Details

#args ⇒ Object 



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# File 'lib/zoom/cache.rb', line 8

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

#available_tags ⇒ Object 



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# File 'lib/zoom/cache.rb', line 13

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

#clear ⇒ Object 



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# File 'lib/zoom/cache.rb', line 17

def clear
    @cache_file.delete if (@cache_file.exist?)
    @results = nil
    @thread.kill if (@thread)
    @thread = nil
    @header = nil
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zoom/cache.rb', line 25

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 34

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

#paths ⇒ Object 



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# File 'lib/zoom/cache.rb', line 105

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

#pattern ⇒ Object 



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# File 'lib/zoom/cache.rb', line 110

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

#profile_name ⇒ Object 



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# File 'lib/zoom/cache.rb', line 115

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 120

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

#read ⇒ Object 



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# File 'lib/zoom/cache.rb', line 125

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

    @results = Array.new
    tag = 1
    @thread.kill if (@thread)
    @thread = Thread.new do
        # 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=", "")
                    )
                elsif (line.match(/^-?-?$/))
                    # Ignore dividers when searching with context
                    # and empty lines
                else
                    @results.push(
                        Zoom::Cache::Result.new(tag, line, self)
                    )
                    tag += 1
                end
            end
        end
    end
end

#shortcut(config) ⇒ Object 



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# File 'lib/zoom/cache.rb', line 154

def shortcut(config)
    return if (empty?)

    config.validate_colors
    if (!config.has_profile?(profile_name))
        raise Zoom::Error::ProfileDoesNotExists.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(
                    /(#{pattern})/i,
                    config.hilight_match("\\1")
                )
            ].join(" ")
        else
            tag = result.tag
            line = result.contents
            puts [config.hilight_tag("[#{tag}]"), line].join(" ")
        end
    end
end

#write(str) ⇒ Object 



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# File 'lib/zoom/cache.rb', line 195

def write(str)
    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|
        f.write(str.gsub(/\r/, "^M"))
    end
end