Class: DOMtempl

Inherits:
Object
  • Object
show all
Defined in:
lib/domtempl.rb

Constant Summary collapse

FRAGMENT = 
0x00000001
PRETTIFY = 
0x00000002

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input, flags = 0) ⇒ DOMtempl

Returns a new instance of DOMtempl.



11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/domtempl.rb', line 11

def initialize(input, flags = 0)
	@vars = { }
	@var_iters = { }

	if (!(flags & FRAGMENT).zero?)
		@_document = Nokogiri::XML::DocumentFragment.parse(input)
	else
		@_document = Nokogiri::HTML(open(input))
	end

	parse()
end

Instance Attribute Details

#vars ⇒ Object

Returns the value of attribute vars.



9
10
11
 
# File 'lib/domtempl.rb', line 9

def vars
  @vars
end

Instance Method Details

#assign(path, var) ⇒ Object 



342
343
344
 
# File 'lib/domtempl.rb', line 342

def assign(path, var)
	write_var(path, var)
end

#dump ⇒ Object 



346
347
348
349
 
# File 'lib/domtempl.rb', line 346

def dump()
	reflow()
	return @_document.to_html()
end

#dumpXML ⇒ Object 



355
356
357
358
 
# File 'lib/domtempl.rb', line 355

def dumpXML()
	reflow()
	return @_document.toxml()
end

#error(str) ⇒ Object 



24
25
26
 
# File 'lib/domtempl.rb', line 24

def error( str)
	puts "Error:" + str
end

#expand_path(node, base, path = nil) ⇒ Object 



142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
 
# File 'lib/domtempl.rb', line 142

def expand_path(node, base, path = nil)
	if (path == nil) then path = node.get_attribute(base) end

	top = node.parent
	while path[0] != '/'
		top_path = '';
		if (!top) then path = '/' + path; break; end
		if (top.type != Nokogiri::XML::Node::ELEMENT_NODE)
			top = top.parent
			next;
		end
		if (top.has_attribute?('data-from'))
			top_path = top.get_attribute('data-from') + '.';
		elsif (top.has_attribute?('data-each'))
			top_path = top.get_attribute('data-each') + '/';
		elsif (top.has_attribute?('data-same'))
			top_path = top.get_attribute('data-same') + '/';
		elsif (top.has_attribute?('data-when'))
			top_path = top.get_attribute('data-when') + '.';
		end

		path = top_path + path;
		top = top.parent
	end
	return path
end

#out ⇒ Object 



351
352
353
 
# File 'lib/domtempl.rb', line 351

def out()
	print dump()
end

#outXML ⇒ Object 



360
361
362
 
# File 'lib/domtempl.rb', line 360

def outXML()
	print dumpXML()
end

#parse ⇒ Object 



338
339
340
 
# File 'lib/domtempl.rb', line 338

def parse()
	parse_vars_node(@_document)
end

#parse_vars_node(root) ⇒ Object 



169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
 
# File 'lib/domtempl.rb', line 169

def parse_vars_node(root)
	for node in root.children

		if (node.type == Nokogiri::XML::Node::ELEMENT_NODE and node.attributes())

			if node.has_attribute?('data-each')
				 @var_iters[ expand_path(node, 'data-each') ] = 0
			end

			if node.has_attribute?('data-same')
				@var_iters[ expand_path(node, 'data-same') ] += 1
			end

			#for attr in node.get_attributes:
			#	print attr
			for i in 0..node.attributes.length-1
				attr = node.attribute_nodes[i]
				if (attr.name.include?('data-attr-'))

					key = attr.name['data-attr'.length..-1]

					write_var(
						expand_path(node, '', not(attr.value) ? key : attr.value),
						node.get_attribute(key).to_s
					)
				end
			end

			if node.has_attribute?('data-var')
				write_var(
					expand_path(node, 'data-var'),
					node.inner_text()
				)
			end

			if node.has_attribute?('data-when')
				write_var(
					expand_path(node, 'data-when'),
					true, 1
				)
			end
		end
		if node.children
			parse_vars_node(node)
		end
	end
end

#read_var(path) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
 
# File 'lib/domtempl.rb', line 28

def read_var(path)

	if (path[0] == '/') then path = path[1..-1] end
	walk = path.split(/(\.|\/)/, -1) #, -1, PREG_SPLIT_DELIM_CAPTURE);

#puts "let's r-walk [" + path + "] {"
#puts walk
#puts " } "
#puts @vars

	cpath = '/'
	ptr = @vars
	last = walk[ walk.length - 1 ]

	(0..walk.length-2).step(2).each do |i|

		step = walk[i]
		mod = walk[i+1]
		cpath += step

		if (ptr[step].nil?)
			error('undefined array "' + step + '" of path ' + path)
			return nil;
		end

		ptr = ptr[step];

		if (mod == '/')
			n = @var_iters[cpath];
			#puts sprintf("Iterator of `%s` is %d", cpath, n)

			if (ptr[n].nil?)
				error(('cant iterate through "%d"' % n) + ' of path ' + path);
				return nil;
			end 

			ptr = ptr[n];

			if (last == '*' and i == walk.length - 3) then return n; end # Hack -- iterator itself
			if (last == '' and i == walk.length - 3) then break; end
		end

		cpath += mod;
	end

	if (last == '')
		return ptr;
	end
	if (ptr[last].nil?)
		error('undefined variable "'+last+'" of path "' + path + '"');
		return nil;
	end
	return ptr[ last ];
end

#reflow ⇒ Object 



326
327
328
329
330
331
332
333
334
335
336
 
# File 'lib/domtempl.rb', line 326

def reflow()
	# Reset iteration counters
	if (@var_iters)
		for i in @var_iters.keys
			@var_iters[i] = 0;
		end
	end

	# Reflow all variables
	replace_vars(@_document);
end

#replace_vars(root) ⇒ Object 



264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
 
# File 'lib/domtempl.rb', line 264

def replace_vars(root)
	for i in 0..root.children.length-1
		if i >= root.children.length # because range/xrange doesn't change :((
			break
		end

		node = root.children[i];
		clean = []

		if (node.type == Nokogiri::XML::Node::ELEMENT_NODE and node.attributes())
			if node.has_attribute?('data-when')
				if not( read_var(expand_path(node, 'data-when')) )
					i -= safe_remove(node);
					next;
				end
				clean.push( 'data-when' );
			end

			if (node.has_attribute?('data-same'))
				clean.push( 'data-same' );
				next;
			end
			if (node.has_attribute?('data-each'))
				clean.push( 'data-each' );
				path = expand_path(node, 'data-each');
				arr = read_var(path);

				# Kill marked siblings
				kill = node.next_sibling;
				while (kill)
					_next = kill.next_sibling;
					if (kill.type == Nokogiri::XML::Node::ELEMENT_NODE and kill.has_attribute('data-same'))
						safe_remove(kill);
					end
					kill = _next;
				end

				#print "Cloning time with"
				#print arr

				if (arr.length)
					# Clone new siblings
					last = nil;
					(1..arr.length-1).each do |j|
						#puts sprintf("Doing clone #%d, setting var iter of /%s", j, path);
						@var_iters[path] = j;
						nod = safe_clone(node, last);
						last = nod;
						nod.remove_attribute('data-each');
						nod.set_attribute('data-same', path);
						replace_vars_node(nod, ['data-same']);
					end
					@var_iters[path] = 0;
				end

				#print "CLONE COMPLETE"
			end
		replace_vars_node( node, clean );
		end
	end
end

#replace_vars_node(node, clean) ⇒ Object 



217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
 
# File 'lib/domtempl.rb', line 217

def replace_vars_node(node, clean)
	stop_here = false; #hack, for speed

	if (node.attributes)

		if (node.type == Nokogiri::XML::Node::ELEMENT_NODE)

			j = -1
			#for (j = 0; j < node.get_attributes.length; j++):
			while j < node.attributes.length - 1
				j += 1
				attr = node.attribute_nodes[j];
				if (attr.name.include?('data-attr-'))
					key = attr.name['data-attr-'.length..-1]
					path = expand_path(node, '', (not(attr.value) ? key : attr.value));
					val = read_var(path);
					if (val != false)
						node.set_attribute(key, val);
					end
					clean.push( attr.name );
				end
			end

			if (node.has_attribute?('data-var'))
				#print "\nReplacing data-var for `"
				#print node
				#puts "` using the path `"  + expand_path(node, 'data-var') + "`"
				clean.push( 'data-var' )
				node.inner_html = 
					read_var(expand_path(node, 'data-var'))
				;

				#print "Inner html is now:" + node.toxml()
				#print "\n"
				stop_here = true; # do not traverse children of inserted node
			end
		end
	end

	if (node.children and not(stop_here)) # stop here if 'data-var' was used
		replace_vars(node);
	end
	for attr in clean
		node.remove_attribute(attr);
	end
end

#safe_clone(elem, after = nil) ⇒ Object 



382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
 
# File 'lib/domtempl.rb', line 382

def safe_clone(elem, after = nil)
	if after == nil then after = elem; end
	
	#print "Must clone "
	#puts elem
	#print " after "
	#puts after
	
	#if (elem.cloneNode)

		orig = elem.previous_sibling;
		ident = nil;
		if (orig != nil \
		and orig.type == Nokogiri::XML::Node::TEXT_NODE \
		and orig.inner_text.strip() == '' 
		#and orig.isWhitespaceInElementContent
		)
			ident = orig.clone();
			#print "Found ident ("
			#print ident.inner_text.length
			#print ident
			#print ")"
			#puts ""
		end

		cln = elem.clone();

		# Note: because Nokogiri has different DOM-append methods,
		# we do not need appendChild/insertBefore wraps
		after.after(cln);
		if (ident) then cln.before(ident); end

		return cln;
	#end
	#return nil;
end

#safe_remove(node) ⇒ Object 



364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
 
# File 'lib/domtempl.rb', line 364

def safe_remove(node)
	ident = node.previous_sibling;
	#print "and ws is "
	#print ident.isWhitespaceInElementContent
	r = 0;
	if (ident != nil \
		and ident.type == Nokogiri::XML::Node::TEXT_NODE \
		and ident.inner_text.strip() == ''
		#and ident.isWhitespaceInElementContent
	)
		ident.remove();
		r = 1;
	end

	node.remove()
	return r
end

#write_var(path, val, no_overwrite = false) ⇒ Object 



83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
 
# File 'lib/domtempl.rb', line 83

def write_var(path, val, no_overwrite = false)

	if (path[0] == '/') then path = path[1..path.length]; end
	walk = path.split(/(\.|\/)/, -1); #, -1, PREG_SPLIT_DELIM_CAPTURE);

	cpath = '/';
	ptr = @vars;
	last = walk[ walk.length - 1 ];

#puts "Lets w-walk [ " + path + "] { "
#puts walk
#puts "}"

	(0..walk.length-2).step(2).each do |i|
		step = walk[i]
		mod = walk[i+1]
		cpath += step
		if (mod == '/')
			n = 0;
			if (ptr[step].nil? or ptr[step] == true)
				ptr[step] = [ ]
				@var_iters[cpath] = 0
			else
				n = @var_iters[cpath]
			end
			ptr = ptr[step]
			if (last == '' and i == walk.length - 3) then break; end
			if (ptr[n].nil?)
				ptr[n] = { }
			end
			ptr = ptr[n]
		end

		if (mod == '.')
			if (ptr[step].nil? or ptr[step] == true)
				ptr[step] = { }
			end
			ptr = ptr[step]
		end
		cpath += mod
	end

	if (last == '')
		#print ptr
		#if isinstance(ptr, dict)
		#	ptr[ ptr.length ] = val;
		#else
			ptr.push( val );
		#end
		return;
	end

	if (no_overwrite and not(ptr[last].nil?)) then return; end
#		puts "Setting [" + last + "]"
#		puts "in" 
#		puts ptr
	ptr[ last ] = val;
end