initial commit

.gitignore

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+.DS_Store
+.bundle
+config/*.yml
+.idea

Gemfile

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+source "http://rubygems.org"
+
+gemspec

Rakefile

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+require 'bundler'
+Bundler::GemHelper.install_tasks

blight.gemspec

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+# -*- encoding: utf-8 -*-
+$:.push File.expand_path("../lib", __FILE__)
+require "blight/version"
+
+Gem::Specification.new do |s|
+  s.name        = 'blight'
+  s.version     = Blight::VERSION
+  s.platform    = Gem::Platform::RUBY
+  s.summary     = "ncurses with less cursing"
+  s.description = "Blight provides a sane interface to the very procedural ncurses API"
+  s.authors     = ["Justin Searls"]
+  s.email       = 'searls@gmail.com'
+  s.homepage    = 'https://github.com/searls/blight'
+
+  s.add_dependency "ncurses-ruby"
+
+
+  s.files         = `git ls-files`.split("\n")
+  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+  s.require_paths = ["lib"]
+end

lib/blight.rb

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+require 'ncurses'
+
+module Blight
+
+  class RunsLoop
+    def run(options = {})
+      config = default_options.merge(options)
+
+      begin
+        Ncurses.initscr
+        Ncurses.raw
+        Ncurses.start_color if config[:color]
+        config[:echo] ? Ncurses.echo : Ncurses.noecho
+
+        yield window = Window.new
+
+        while window.open?
+          key = Ncurses.stdscr.getch
+          config[:listeners].each { |l| l.listen({value: key.chr}, window) }
+        end
+
+      ensure
+        Ncurses.endwin
+      end
+    end
+
+    private
+
+    def default_options
+      {
+        color: true,
+        listeners: [ListensForQuitters.new],
+        echo: false
+      }
+    end
+
+  end
+
+  class Window
+
+    def initialize
+      @window = Ncurses.stdscr
+    end
+
+    def x
+      Ncurses.getcurx(@window)
+    end
+
+    def y
+      Ncurses.getcury(@window)
+    end
+
+    def width
+      Ncurses.getmaxx(@window)
+    end
+
+    def height
+      Ncurses.getmaxy(@window)
+    end
+
+    def print(string, x = x, y = y)
+      Ncurses.mvwprintw(@window, y, x, string)
+      refresh
+    end
+
+    def open?
+      !@closed
+    end
+
+    def close
+      @closed = true
+    end
+
+    def refresh
+      Ncurses.refresh
+    end
+
+  end
+
+  class RendersCenteredText
+    def initialize(window)
+      @window = window
+    end
+
+    def render(text)
+      center_x = @window.x + (@window.width - text.length) / 2
+      center_y = @window.height / 2
+      @window.print(text, center_x, center_y)
+    end
+  end
+
+  class UsesColors
+    def initialize(window)
+      @window = window
+    end
+
+    def use(foreground, background)
+      Ncurses.init_pair(1, find(foreground), find(background))
+      Ncurses.attron(Ncurses.COLOR_PAIR(1))
+      yield
+      Ncurses.attroff(Ncurses.COLOR_PAIR(1))
+    end
+
+    private
+
+    def find(color)
+      Ncurses.const_get("COLOR_#{color.to_s.upcase}")
+    end
+
+  end
+
+  class ListensForQuitters
+    def listen(event, window)
+      window.close if event[:value] == 'q'
+    end
+  end
+
+end
+

lib/blight/version.rb

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+module Blight
+  VERSION = "0.0.1"
+end