Add Control-P statuslines

This hacks around the way CtrlP handles statuslines. Powerline will
always override the statusline, but CtrlP doesn't make its details
available as buffer variables so separate functions assign the details
to buffer variables each statusline redraw.

Currently this statusline only uses a couple of highlight groups,
colorschemes should add the HL groups to make this prettier.

powerline/config_files/config.json

@@ -39,7 +39,8 @@
 				"help": "help",
 				"quickfix": "quickfix",
 
-				"powerline.matchers.plugin.nerdtree.nerdtree": "plugin/nerdtree"
+				"powerline.matchers.plugin.nerdtree.nerdtree": "plugin/nerdtree",
+				"powerline.matchers.plugin.ctrlp.ctrlp": "plugin/ctrlp"
 			}
 		},
 		"wm": {

powerline/config_files/themes/vim/plugin/ctrlp.json

@@ -0,0 +1,22 @@
+{
+	"default_module": "powerline.segments.plugin.ctrlp",
+	"segments": {
+		"left": [
+			{
+				"name": "ctrlp_left"
+			},
+			{
+				"type": "string",
+				"highlight_group": ["ctrlp.background", "background"],
+				"draw_soft_divider": false,
+				"draw_hard_divider": false,
+				"width": "auto"
+			}
+		],
+		"right": [
+			{
+				"name": "ctrlp_right"
+			}
+		]
+	}
+}

powerline/matchers/plugin/ctrlp.py

@@ -0,0 +1,27 @@
+# vim:fileencoding=utf-8:noet
+
+import os
+import vim
+
+vim.command('''
+function! Powerline_plugin_ctrlp_main(...)
+	let b:powerline_ctrlp_type = 'main'
+	let b:powerline_ctrlp_args = a:000
+endfunction
+''')
+
+vim.command('''
+function! Powerline_plugin_ctrlp_prog(...)
+	let b:powerline_ctrlp_type = 'prog'
+	let b:powerline_ctrlp_args = a:000
+endfunction
+''')
+
+vim.command('''
+let g:ctrlp_status_func = { 'main': 'Powerline_plugin_ctrlp_main', 'prog': 'Powerline_plugin_ctrlp_prog' }
+''')
+
+
+def ctrlp(matcher_info):
+	name = matcher_info['buffer'].name
+	return name and os.path.basename(name) == 'ControlP'

powerline/segments/plugin/ctrlp.py

@@ -0,0 +1,94 @@
+# vim:fileencoding=utf-8:noet
+
+import vim
+
+
+def ctrlp_left(pl):
+	ctrlp_type = vim.eval('getbufvar("%", "powerline_ctrlp_type")')
+	ctrlp_args = vim.eval('getbufvar("%", "powerline_ctrlp_args")')
+
+	return globals()['ctrlp_stl_left_' + ctrlp_type](pl, *ctrlp_args)
+
+
+def ctrlp_right(pl):
+	ctrlp_type = vim.eval('getbufvar("%", "powerline_ctrlp_type")')
+	ctrlp_args = vim.eval('getbufvar("%", "powerline_ctrlp_args")')
+
+	return globals()['ctrlp_stl_right_' + ctrlp_type](pl, *ctrlp_args)
+
+
+def ctrlp_stl_left_main(pl, focus, byfname, regex, prev, item, next, marked):
+	marked = marked[2:-1]
+	segments = []
+
+	if int(regex):
+		segments.append({
+			'contents': 'regex',
+			'highlight_group': ['ctrlp.regex', 'background'],
+			})
+
+	segments += [
+		{
+			'contents': prev + ' ',
+			'highlight_group': ['ctrlp.prev', 'background'],
+			'draw_inner_divider': True,
+			'priority': 40,
+		},
+		{
+			'contents': item,
+			'highlight_group': ['ctrlp.item', 'file_name'],
+			'draw_inner_divider': True,
+			'width': 10,
+		},
+		{
+			'contents': ' ' + next,
+			'highlight_group': ['ctrlp.next', 'background'],
+			'draw_inner_divider': True,
+			'priority': 40,
+		},
+	]
+
+	if marked != '-':
+		segments.append({
+			'contents': marked,
+			'highlight_group': ['ctrlp.marked', 'background'],
+			'draw_inner_divider': True,
+			})
+
+	return segments
+
+
+def ctrlp_stl_right_main(pl, focus, byfname, regex, prev, item, next, marked):
+	segments = [
+		{
+			'contents': focus,
+			'highlight_group': ['ctrlp.focus', 'background'],
+			'draw_inner_divider': True,
+			'priority': 50,
+		},
+		{
+			'contents': byfname,
+			'highlight_group': ['ctrlp.byfname', 'background'],
+			'priority': 50,
+		},
+	]
+
+	return segments
+
+
+def ctrlp_stl_left_prog(pl, progress):
+	return [
+		{
+			'contents': 'Loading...',
+			'highlight_group': ['ctrlp.progress', 'file_name'],
+		},
+	]
+
+
+def ctrlp_stl_right_prog(pl, progress):
+	return [
+		{
+			'contents': progress,
+			'highlight_group': ['ctrlp.progress', 'file_name'],
+		},
+	]