Class: CLI::UI::Spinner::SpinGroup::Task

Inherits:
Object
  • Object
show all
Defined in:
lib/cli/ui/spinner/spin_group.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(title, &block) ⇒ Task

Initializes a new Task This is managed entirely internally by SpinGroup

Attributes

  • title - Title of the task

  • block - Block for the task, will be provided with an instance of the spinner



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# File 'lib/cli/ui/spinner/spin_group.rb', line 42

def initialize(title, &block)
  @title = title
  @always_full_render = title =~ Formatter::SCAN_WIDGET
  @thread = Thread.new do
    cap = CLI::UI::StdoutRouter::Capture.new(self, with_frame_inset: false, &block)
    begin
      cap.run
    ensure
      @stdout = cap.stdout
      @stderr = cap.stderr
    end
  end

  @m = Mutex.new
  @force_full_render = false
  @done = false
  @exception = nil
  @success   = false
end

Instance Attribute Details

#exception ⇒ Object (readonly)

Returns the value of attribute exception.



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# File 'lib/cli/ui/spinner/spin_group.rb', line 32

def exception
  @exception
end

#stderr ⇒ Object (readonly)

Returns the value of attribute stderr.



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# File 'lib/cli/ui/spinner/spin_group.rb', line 32

def stderr
  @stderr
end

#stdout ⇒ Object (readonly)

Returns the value of attribute stdout.



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# File 'lib/cli/ui/spinner/spin_group.rb', line 32

def stdout
  @stdout
end

#success ⇒ Object (readonly)

Returns the value of attribute success.



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# File 'lib/cli/ui/spinner/spin_group.rb', line 32

def success
  @success
end

#title ⇒ Object (readonly)

Returns the value of attribute title.



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# File 'lib/cli/ui/spinner/spin_group.rb', line 32

def title
  @title
end

Instance Method Details

#check ⇒ Object

Checks if a task is finished



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# File 'lib/cli/ui/spinner/spin_group.rb', line 64

def check
  return true if @done
  return false if @thread.alive?

  @done = true
  begin
    status = @thread.join.status
    @success = (status == false)
    @success = false if @thread.value == TASK_FAILED
  rescue => exc
    @exception = exc
    @success = false
  end

  @done
end

#render(index, force = true, width: CLI::UI::Terminal.width) ⇒ Object

Re-renders the task if required:

We try to be as lazy as possible in re-rendering the full line. The spinner rune will change on each render for the most part, but the body text will rarely have changed. If the body text has changed, we set @force_full_render.

Further, if the title string includes any CLI::UI::Widgets, we assume that it may change from render to render, since those evaluate more dynamically than the rest of our format codes, which are just text formatters. This is controlled by @always_full_render.

Attributes

  • index - index of the task

  • force - force rerender of the task

  • width - current terminal width to format for



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# File 'lib/cli/ui/spinner/spin_group.rb', line 99

def render(index, force = true, width: CLI::UI::Terminal.width)
  @m.synchronize do
    if force || @always_full_render || @force_full_render
      full_render(index, width)
    else
      partial_render(index)
    end
  ensure
    @force_full_render = false
  end
end

#update_title(new_title) ⇒ Object

Update the spinner title

Attributes

  • title - title to change the spinner to



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# File 'lib/cli/ui/spinner/spin_group.rb', line 117

def update_title(new_title)
  @m.synchronize do
    @always_full_render = new_title =~ Formatter::SCAN_WIDGET
    @title = new_title
    @force_full_render = true
  end
end