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<pre><a name="line-1"></a><span class='hs-comment'>----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : XMonad.Util.Image</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) 2010 Alejandro Serrano</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD-style (see xmonad/LICENSE)</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Maintainer : trupill@gmail.com</span>
<a name="line-8"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-9"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- Utilities for manipulating [[Bool]] as images</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-14"></a>
<a name="line-15"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span><span class='hs-varop'>.</span><span class='hs-conid'>Image</span>
<a name="line-16"></a> <span class='hs-layout'>(</span> <span class='hs-comment'>-- * Usage:</span>
<a name="line-17"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-18"></a> <span class='hs-conid'>Placement</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-varid'>iconPosition</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-varid'>drawIcon</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-22"></a>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span><span class='hs-varop'>.</span><span class='hs-conid'>Font</span> <span class='hs-layout'>(</span><span class='hs-varid'>stringToPixel</span><span class='hs-layout'>,</span><span class='hs-varid'>fi</span><span class='hs-layout'>)</span>
<a name="line-25"></a>
<a name="line-26"></a><a name="Placement"></a><span class='hs-comment'>-- | Placement of the icon in the title bar</span>
<a name="line-27"></a><a name="Placement"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Placement</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>OffsetLeft</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ An exact amount of pixels from the upper left corner</span>
<a name="line-28"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OffsetRight</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ An exact amount of pixels from the right left corner</span>
<a name="line-29"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>CenterLeft</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Centered in the y-axis, an amount of pixels from the left</span>
<a name="line-30"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>CenterRight</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Centered in the y-axis, an amount of pixels from the right</span>
<a name="line-31"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-comment'>-- $usage</span>
<a name="line-34"></a><span class='hs-comment'>-- This module uses matrices of boolean values as images. When drawing them,</span>
<a name="line-35"></a><span class='hs-comment'>-- a True value tells that we want the fore color, and a False value that we</span>
<a name="line-36"></a><span class='hs-comment'>-- want the background color to be painted.</span>
<a name="line-37"></a><span class='hs-comment'>-- In the module we suppose that those matrices are represented as [[Bool]],</span>
<a name="line-38"></a><span class='hs-comment'>-- so the lengths of the inner lists must be the same.</span>
<a name="line-39"></a><span class='hs-comment'>--</span>
<a name="line-40"></a><span class='hs-comment'>-- See "Xmonad.Layout.Decoration" for usage examples</span>
<a name="line-41"></a>
<a name="line-42"></a><a name="imageDims"></a><span class='hs-comment'>-- | Gets the ('width', 'height') of an image</span>
<a name="line-43"></a><span class='hs-definition'>imageDims</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Bool</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-44"></a><span class='hs-definition'>imageDims</span> <span class='hs-varid'>img</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-varid'>img</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>length</span> <span class='hs-varid'>img</span><span class='hs-layout'>)</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="iconPosition"></a><span class='hs-comment'>-- | Return the 'x' and 'y' positions inside a 'Rectangle' to start drawing</span>
<a name="line-47"></a><span class='hs-comment'>-- the image given its 'Placement'</span>
<a name="line-48"></a><span class='hs-definition'>iconPosition</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Placement</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Bool</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Position</span><span class='hs-layout'>,</span><span class='hs-conid'>Position</span><span class='hs-layout'>)</span>
<a name="line-49"></a><span class='hs-definition'>iconPosition</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>OffsetLeft</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-definition'>iconPosition</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>OffsetRight</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>icon</span> <span class='hs-keyglyph'>=</span>
<a name="line-51"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>icon_w</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>imageDims</span> <span class='hs-varid'>icon</span>
<a name="line-52"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>w</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>x</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>icon_w</span><span class='hs-layout'>,</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-53"></a><span class='hs-definition'>iconPosition</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>CenterLeft</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>icon</span> <span class='hs-keyglyph'>=</span>
<a name="line-54"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>icon_h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>imageDims</span> <span class='hs-varid'>icon</span>
<a name="line-55"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>icon_h</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-56"></a><span class='hs-definition'>iconPosition</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>CenterRight</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>icon</span> <span class='hs-keyglyph'>=</span>
<a name="line-57"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>icon_w</span><span class='hs-layout'>,</span> <span class='hs-varid'>icon_h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>imageDims</span> <span class='hs-varid'>icon</span>
<a name="line-58"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>w</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>x</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>icon_w</span><span class='hs-layout'>,</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-layout'>(</span><span class='hs-varid'>icon_h</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="iconToPoints"></a><span class='hs-comment'>-- | Converts an image represented as [[Bool]] to a series of points</span>
<a name="line-61"></a><span class='hs-comment'>-- to be painted (the ones with True values)</span>
<a name="line-62"></a><span class='hs-definition'>iconToPoints</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Bool</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Point</span><span class='hs-keyglyph'>]</span>
<a name="line-63"></a><span class='hs-definition'>iconToPoints</span> <span class='hs-varid'>icon</span> <span class='hs-keyglyph'>=</span>
<a name="line-64"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>labels_inside</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>zip</span> <span class='hs-layout'>(</span><span class='hs-varid'>iterate</span> <span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-varop'>+</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>icon</span>
<a name="line-65"></a> <span class='hs-varid'>filtered_inside</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>l</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>l</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>labels_inside</span>
<a name="line-66"></a> <span class='hs-varid'>labels_outside</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zip</span> <span class='hs-layout'>(</span><span class='hs-varid'>iterate</span> <span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-varop'>+</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varid'>filtered_inside</span>
<a name="line-67"></a> <span class='hs-keyword'>in</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Point</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>labels_outside</span><span class='hs-layout'>,</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>]</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="movePoint"></a><span class='hs-comment'>-- | Displaces a point ('a', 'b') along a vector ('x', 'y')</span>
<a name="line-70"></a><span class='hs-definition'>movePoint</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span>
<a name="line-71"></a><span class='hs-definition'>movePoint</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Point</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>+</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="movePoints"></a><span class='hs-comment'>-- | Displaces a list of points along a vector 'x', 'y'</span>
<a name="line-74"></a><span class='hs-definition'>movePoints</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Point</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Point</span><span class='hs-keyglyph'>]</span>
<a name="line-75"></a><span class='hs-definition'>movePoints</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>points</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>movePoint</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>points</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="drawIcon"></a><span class='hs-comment'>-- | Draw an image into a X surface</span>
<a name="line-78"></a><span class='hs-definition'>drawIcon</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Functor</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Display</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Drawable</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GC</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-79"></a> <span class='hs-keyglyph'>-></span><span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Bool</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-80"></a><span class='hs-definition'>drawIcon</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>drw</span> <span class='hs-varid'>gc</span> <span class='hs-varid'>fc</span> <span class='hs-varid'>bc</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>icon</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-81"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>i_w</span><span class='hs-layout'>,</span> <span class='hs-varid'>i_h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>imageDims</span> <span class='hs-varid'>icon</span>
<a name="line-82"></a> <span class='hs-varid'>fcolor</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>stringToPixel</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>fc</span>
<a name="line-83"></a> <span class='hs-varid'>bcolor</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>stringToPixel</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>bc</span>
<a name="line-84"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>setForeground</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>gc</span> <span class='hs-varid'>bcolor</span>
<a name="line-85"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fillRectangle</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>drw</span> <span class='hs-varid'>gc</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>i_w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>i_h</span><span class='hs-layout'>)</span>
<a name="line-86"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>setForeground</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>gc</span> <span class='hs-varid'>fcolor</span>
<a name="line-87"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>drawPoints</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>drw</span> <span class='hs-varid'>gc</span> <span class='hs-layout'>(</span><span class='hs-varid'>movePoints</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>iconToPoints</span> <span class='hs-varid'>icon</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>coordModeOrigin</span>
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