Completely remove mouse support

Since the version 0.7.0, fzf internally used Curses.getch() call to take user
input, which allowed it to support mouse input as well. However it has turned
out that Curses.getch() has introduced glitches that cannot be easily handled
(e.g. Try resize the terminal). So I finally decided that it's not worth the
trouble and drop the mouse support.

3 files changed, 72 insertions, 136 deletions

diff --git a/README.md b/README.md
index baa73f2c..6e2c2246 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,6 @@ usage: fzf [options]
     -i                   Case-insensitive match (default: smart-case match)
     +i                   Case-sensitive match
     +c, --no-color       Disable colors
-        --no-mouse       Disable mouse
 
   Environment variables
     FZF_DEFAULT_COMMAND  Default command to use when input is tty
@@ -102,9 +101,6 @@ The following readline key bindings should also work as expected.
 If you enable multi-select mode with `-m` option, you can select multiple items
 with TAB or Shift-TAB key.
 
-You can also use mouse. Click on an item to select it or shift-click to select
-multiple items. Use mouse wheel to move the cursor up and down.
-
 ### Extended-search mode
 
 With `-x` or `--extended` option, fzf will start in "extended-search mode".
diff --git a/fzf b/fzf
index 5426e53d..97b664c5 100755
--- a/fzf
+++ b/fzf
@@ -7,7 +7,7 @@
 #  / __/ / /_/ __/
 # /_/   /___/_/    Fuzzy finder for your shell
 #
-# Version: 0.7.3 (March 5, 2014)
+# Version: 0.8.0 (March 6, 2014)
 #
 # Author:  Junegunn Choi
 # URL:     https://github.com/junegunn/fzf
@@ -50,7 +50,7 @@ end
 
 class FZF
   C = Curses
-  attr_reader :rxflag, :sort, :color, :mouse, :multi, :query, :filter, :extended
+  attr_reader :rxflag, :sort, :color, :multi, :query, :filter, :extended
 
   class AtomicVar
     def initialize value
@@ -79,9 +79,7 @@ class FZF
     @color    = true
     @multi    = false
     @extended = nil
-    @mouse    = true
     @filter   = nil
-    @pending  = nil
 
     argv =
       if opts = ENV['FZF_DEFAULT_OPTS']
@@ -102,7 +100,6 @@ class FZF
       when '+i'                  then @rxflag   = 0
       when '-c', '--color'       then @color    = true
       when '+c', '--no-color'    then @color    = false
-      when       '--no-mouse'    then @mouse    = false
       when '+s', '--no-sort'     then @sort     = nil
       when '-q', '--query'
         usage 1, 'query string required' unless query = argv.shift
@@ -129,11 +126,11 @@ class FZF
 
     @source   = source.clone
     @mtx      = Mutex.new
-    @rmtx     = Mutex.new
     @cv       = ConditionVariable.new
     @events   = {}
     @new      = []
     @queue    = Queue.new
+    @pending  = nil
 
     unless @filter
       @query  ||= AtomicVar.new('')
@@ -207,7 +204,6 @@ class FZF
     -i                   Case-insensitive match (default: smart-case match)
     +i                   Case-sensitive match
     +c, --no-color       Disable colors
-        --no-mouse       Disable mouse
 
   Environment variables
     FZF_DEFAULT_COMMAND  Default command to use when input is tty
@@ -510,11 +506,6 @@ class FZF
 
   def init_screen
     C.init_screen
-    if @mouse
-      C.mouseinterval 0
-      C.mousemask C::ALL_MOUSE_EVENTS
-    end
-    C.stdscr.keypad(true)
     C.start_color
     dbg =
       if C.respond_to?(:use_default_colors)
@@ -524,7 +515,6 @@ class FZF
         C::COLOR_BLACK
       end
     C.raw
-    C.nonl
     C.noecho
 
     if @color
@@ -582,7 +572,6 @@ class FZF
           exit 1
         end
       else
-        $stdin.reopen IO.open(IO.sysopen('/dev/tty'), 'r') if curses
         @source
       end
 
@@ -722,10 +711,8 @@ class FZF
     Thread.new do
       begin
         while blk = @queue.shift
-          @rmtx.synchronize do
-            blk.call
-            refresh
-          end
+          blk.call
+          refresh
         end
       rescue Exception => e
         @main.raise e
@@ -757,54 +744,67 @@ class FZF
     end
   end
 
-  def test_mouse st, *states
-    states.any? { |s| s & st > 0 }
-  end
-
-  def to_printable ch
-    if ch.is_a?(Fixnum)
-      # Ruby 1.8
-      if (ch.chr rescue '') =~ /[[:print:]]/
-        ch = ch.chr
-      elsif (nch = num_unicode_bytes(ch)) > 1
-        chs = [ch]
-        (nch - 1).times do |i|
-          chs << getch_nb
-        end
-        # UTF-8 TODO Ruby 1.8
-        ch = chs.pack('C*').force_encoding('UTF-8')
-      end
-    end
+  def get_input actions
+    @tty ||= IO.open(IO.sysopen('/dev/tty'), 'r')
 
-    ch.is_a?(String) && ch =~ /[[:print:]]/ && ch
-  end
-
-  def getch_nb
-    @rmtx.synchronize { C.getch }
-  end
-
-  def getch
     if pending = @pending
       @pending = nil
       return pending
     end
 
-    C.stdscr.timeout = -1
-    c = C.getch
-    C.stdscr.timeout = 0
-    if ch = to_printable(c)
-      chs = [ch]
-      while AFTER_1_9 && c = getch_nb
-        if ch = to_printable(c)
-          chs << ch
+    str = ''
+    while true
+      ord =
+        if str.empty?
+          @tty.getc.ord
         else
-          @pending = c
-          break
+          begin
+            ord = @tty.read_nonblock(1).ord
+            if (nb = num_unicode_bytes(ord)) > 1
+              ords = [ord]
+              (nb - 1).times do |_|
+                ords << @tty.read_nonblock(1).ord
+              end
+              # UTF-8 TODO Ruby 1.8
+              ords.pack('C*').force_encoding('UTF-8')
+            else
+              ord
+            end
+          rescue Exception
+            return str
+          end
         end
+
+      ord =
+        case ord = (@tty.read_nonblock(1).ord rescue :esc)
+        when 91
+          case (@tty.read_nonblock(1).ord rescue nil)
+          when 68 then ctrl(:b)
+          when 67 then ctrl(:f)
+          when 66 then ctrl(:j)
+          when 65 then ctrl(:k)
+          when 90 then :stab
+          else         next
+          end
+        when 'b',  98 then :alt_b
+        when 'f', 102 then :alt_f
+        when :esc     then :esc
+        else          next
+        end if ord == 27
+
+      if actions.has_key?(ord)
+        if str.empty?
+          return ord
+        else
+          @pending = ord
+          return str
+        end
+      else
+        unless ord.is_a? String
+          ord = [ord].pack('U*')
+        end
+        str << ord if ord =~ /[[:print:]]/
       end
-      chs
-    else
-      c
     end
   end
 
@@ -841,13 +841,7 @@ class FZF
             else
               @selects[sel] = 1
             end
-            vselect { |v|
-              v + case o
-                  when :select     then 0
-                  when C::KEY_BTAB then 1
-                  else -1
-                  end
-            }
+            vselect { |v| v + (o == :stab ? 1 : -1) }
           end
         },
         ctrl(:b) => proc { cursor = [0, cursor - 1].max; nil },
@@ -859,76 +853,26 @@ class FZF
           nil
         },
       }
-      actions[C::KEY_UP]        = actions[ctrl(:p)] = actions[ctrl(:k)]
-      actions[C::KEY_DOWN]      = actions[ctrl(:n)] = actions[ctrl(:j)]
-      actions[C::KEY_LEFT]      = actions[ctrl(:b)]
-      actions[C::KEY_RIGHT]     = actions[ctrl(:f)]
-      actions[C::KEY_BTAB]      = actions[:select]  = actions[ctrl(:i)]
-      actions[C::KEY_BACKSPACE] = actions[127]      = actions[ctrl(:h)]
+      actions[ctrl(:p)] = actions[ctrl(:k)]
+      actions[ctrl(:n)] = actions[ctrl(:j)]
+      actions[:stab]    = actions[ctrl(:i)]
+      actions[127]      = actions[ctrl(:h)]
       actions[ctrl(:q)] = actions[ctrl(:g)] = actions[ctrl(:c)] = actions[:esc]
 
       emit(:key) { [@query.get, cursor] } unless @query.empty?
-      pmv = nil
       while true
         @cursor_x.set cursor
         render { print_input }
 
-        case ch = getch
-        when C::KEY_MOUSE
-          if m = C.getmouse
-            st = m.bstate
-            if test_mouse(st, C::BUTTON1_PRESSED, C::BUTTON1_RELEASED)
-              if m.y == cursor_y
-                # TODO Wide-characters
-                cursor = [0, [input.length, m.x - 2].min].max
-              elsif m.x > 1 && m.y <= max_items
-                vselect { |v|
-                  tv = max_items - m.y - 1
-                  if test_mouse(st, C::BUTTON1_RELEASED)
-                    if test_mouse(st, C::BUTTON_SHIFT)
-                      ch = :select
-                    elsif pmv == tv
-                      ch = ctrl(:m)
-                    end
-                    pmv = tv
-                  end
-                  tv
-                }
-              end
-            elsif test_mouse(st, 0x8000000, C::BUTTON2_PRESSED)
-              ch = C::KEY_DOWN
-            elsif test_mouse(st, C::BUTTON4_PRESSED)
-              ch = C::KEY_UP
-            end
-          end
-        when 27
-          C.stdscr.timeout = 0
-          ch = # Typeahead arrow keys
-            case ch2 = getch_nb
-            when '[', 91
-              case ch3 = getch_nb
-              when 'D', 68 then ctrl(:b)
-              when 'C', 67 then ctrl(:f)
-              when 'B', 66 then ctrl(:j)
-              when 'A', 65 then ctrl(:k)
-              else ch3
-              end
-            when 'b',  98 then :alt_b
-            when 'f', 102 then :alt_f
-            when nil      then :esc
-            else ch2
-            end
-        end
-
-        upd = actions.fetch(ch, proc { |ch|
-          if ch.is_a? Array
-            input.insert cursor, ch.join
-            cursor += ch.length
-          end
-        }).call(ch)
+        if key = get_input(actions)
+          upd = actions.fetch(key, proc { |str|
+            input.insert cursor, str
+            cursor += str.length
+          }).call(key)
 
-        # Dispatch key event
-        emit(:key) { [@query.set(input.dup), cursor] } if upd
+          # Dispatch key event
+          emit(:key) { [@query.set(input.dup), cursor] } if upd
+        end
       end
     ensure
       C.close_screen
diff --git a/test/test_fzf.rb b/test/test_fzf.rb
index d1006659..65b105ae 100644
--- a/test/test_fzf.rb
+++ b/test/test_fzf.rb
@@ -20,7 +20,6 @@ class TestFZF < MiniTest::Unit::TestCase
     assert_equal false, fzf.multi
     assert_equal true,  fzf.color
     assert_equal nil,   fzf.rxflag
-    assert_equal true,  fzf.mouse
   end
 
   def test_environment_variables
@@ -29,7 +28,7 @@ class TestFZF < MiniTest::Unit::TestCase
     fzf = FZF.new []
     assert_equal 20000, fzf.sort
 
-    ENV['FZF_DEFAULT_OPTS'] = '-x -m -s 10000 -q "  hello  world  " +c --no-mouse -f "goodbye world"'
+    ENV['FZF_DEFAULT_OPTS'] = '-x -m -s 10000 -q "  hello  world  " +c -f "goodbye world"'
     fzf = FZF.new []
     assert_equal 10000,   fzf.sort
     assert_equal '  hello  world  ',
@@ -39,17 +38,15 @@ class TestFZF < MiniTest::Unit::TestCase
     assert_equal :fuzzy,  fzf.extended
     assert_equal true,    fzf.multi
     assert_equal false,   fzf.color
-    assert_equal false,   fzf.mouse
   end
 
   def test_option_parser
     # Long opts
     fzf = FZF.new %w[--sort=2000 --no-color --multi +i --query hello
-                     --filter=howdy --extended-exact --no-mouse]
+                     --filter=howdy --extended-exact]
     assert_equal 2000,    fzf.sort
     assert_equal true,    fzf.multi
     assert_equal false,   fzf.color
-    assert_equal false,   fzf.mouse
     assert_equal 0,       fzf.rxflag
     assert_equal 'hello', fzf.query.get
     assert_equal 'howdy', fzf.filter
@@ -61,7 +58,6 @@ class TestFZF < MiniTest::Unit::TestCase
     assert_equal nil,     fzf.sort
     assert_equal false,   fzf.multi
     assert_equal true,    fzf.color
-    assert_equal true,    fzf.mouse
     assert_equal 1,       fzf.rxflag
     assert_equal 'b',     fzf.filter
     assert_equal 'hello', fzf.query.get