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+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Generates tables of background images which correspond with border images for
+# creating reftests. Input is the filename containing input defined below (a subset
+# of the allowed CSS border properties). An html representation of a table is
+# output to stdout.
+#
+# Usage: python gen-refs.py input_filename
+#
+# Input must take the form (order is not important, nothing is optional, distance in order top, right, bottom, left):
+# width: p;
+# height: p;
+# border-width: p;
+# border-image-source: ...;
+# border-image-slice: p p p p;
+# note that actually border-image-slice takes numbers without px, which represent pixels anyway (or at least coords)
+# border-image-width: np np np np;
+# border-image-repeat: stretch | repeat | round;
+# border-image-outset: np np np np;
+#
+# where:
+# p ::= n'px'
+# np ::= n | p
+#
+# Assumes there is no intrinsic size for the border-image-source, so uses
+# the size of the border image area.
+
+import sys
+
+class Point:
+ def __init__(self, w=0, h=0):
+ self.x = w
+ self.y = h
+class Size:
+ def __init__(self, w=0, h=0):
+ self.width = w
+ self.height = h
+class Rect:
+ def __init__(self, x=0, y=0, x2=0, y2=0):
+ self.x = x
+ self.y = y
+ self.x2 = x2
+ self.y2 = y2
+ def width(self):
+ return self.x2 - self.x
+ def height(self):
+ return self.y2 - self.y
+
+class Props:
+ def __init__(self):
+ self.size = Size()
+
+class np:
+ def __init__(self, n, p):
+ self.n = n
+ self.p = p
+
+ def get_absolute(self, ref):
+ if not self.p == 0:
+ return self.p
+ return self.n * ref
+
+def parse_p(tok):
+ if tok[-2:] == "px":
+ return float(tok[:-2])
+ print "Whoops, not a pixel value " + tok
+
+def parse_np(tok):
+ if tok[-2:] == "px":
+ return np(0, float(tok[:-2]))
+ return np(float(tok), 0)
+
+def parse(filename):
+ f = open(filename, "r")
+ props = Props()
+ for l in f:
+ l = l.strip()
+ if not l[-1] == ";":
+ continue
+ toks = l[:-1].split()
+ if toks[0] == "border-width:":
+ props.width = parse_p(toks[1])
+ if toks[0] == "height:":
+ props.size.height = parse_p(toks[1])
+ if toks[0] == "width:":
+ props.size.width = parse_p(toks[1])
+ if toks[0] == "border-image-source:":
+ props.source = l[l.find(":")+1:l.rfind(";")].strip()
+ if toks[0] == "border-image-repeat:":
+ props.repeat = toks[1]
+ if toks[0] == "border-image-slice:":
+ props.slice = map(parse_p, toks[1:5])
+ if toks[0] == "border-image-width:":
+ props.image_width = map(parse_np, toks[1:5])
+ if toks[0] == "border-image-outset:":
+ props.outset = map(parse_np, toks[1:5])
+ f.close()
+ return props
+
+# the result of normalisation is that all sizes are in pixels and the size,
+# widths, and outset have been normalised to a size and width - the former is
+# the element's interior, the latter is the width of the drawn border.
+def normalise(props):
+ result = Props()
+ result.source = props.source
+ result.repeat = props.repeat
+ result.width = map(lambda x: x.get_absolute(props.width), props.image_width)
+ outsets = map(lambda x: x.get_absolute(props.width), props.outset)
+ result.size.width = props.size.width + 2*props.width + outsets[1] + outsets[3]
+ result.size.height = props.size.height + 2*props.width + outsets[0] + outsets[2]
+ result.slice = props.slice
+ for i in [0,2]:
+ if result.slice[i] > result.size.height:
+ result.slice[i] = result.size.height
+ if result.slice[i+1] > result.size.width:
+ result.slice[i+1] = result.size.width
+
+ return result
+
+def check_parse(props):
+ if not hasattr(props, 'source'):
+ print "missing border-image-source"
+ return False
+ if not hasattr(props.size, 'width'):
+ print "missing width"
+ return False
+ if not hasattr(props.size, 'height'):
+ print "missing height"
+ return False
+ if not hasattr(props, 'width'):
+ print "missing border-width"
+ return False
+ if not hasattr(props, 'image_width'):
+ print "missing border-image-width"
+ return False
+ if not hasattr(props, 'slice'):
+ print "missing border-image-slice"
+ return False
+ if not hasattr(props, 'repeat') or (props.repeat not in ["stretch", "repeat", "round"]):
+ print "missing or incorrect border-image-repeat '" + props.repeat + "'"
+ return False
+ if not hasattr(props, 'outset'):
+ print "missing border-image-outset"
+ return False
+
+ return True
+
+def check_normalise(props):
+ if not hasattr(props, 'source'):
+ print "missing border-image-source"
+ return False
+ if not hasattr(props.size, 'width'):
+ print "missing width"
+ return False
+ if not hasattr(props.size, 'height'):
+ print "missing height"
+ return False
+ if not hasattr(props, 'slice'):
+ print "missing border-image-slice"
+ return False
+ if not hasattr(props, 'repeat') or (props.repeat not in ["stretch", "repeat", "round"]):
+ print "missing or incorrect border-image-repeat '" + props.repeat + "'"
+ return False
+
+ return True
+
+class Tile:
+ def __init__(self):
+ self.slice = Rect()
+ self.border_width = Rect()
+
+# throughout, we will use arrays for nine-patches, the indices correspond thusly:
+# 0 1 2
+# 3 4 5
+# 6 7 8
+
+# Compute the source tiles' slice and border-width sizes
+def make_src_tiles():
+ tiles = [Tile() for i in range(9)]
+
+ rows = [range(3*i, 3*(i+1)) for i in range(3)]
+ cols = [[i, i+3, i+6] for i in range(3)]
+
+ row_limits_slice = [0, props.slice[3], props.size.width - props.slice[1], props.size.width]
+ row_limits_width = [0, props.width[3], props.size.width - props.width[1], props.size.width]
+ for r in range(3):
+ for t in [tiles[i] for i in cols[r]]:
+ t.slice.x = row_limits_slice[r]
+ t.slice.x2 = row_limits_slice[r+1]
+ t.border_width.x = row_limits_width[r]
+ t.border_width.x2 = row_limits_width[r+1]
+
+ col_limits_slice = [0, props.slice[0], props.size.height - props.slice[2], props.size.height]
+ col_limits_width = [0, props.width[0], props.size.height - props.width[2], props.size.height]
+ for c in range(3):
+ for t in [tiles[i] for i in rows[c]]:
+ t.slice.y = col_limits_slice[c]
+ t.slice.y2 = col_limits_slice[c+1]
+ t.border_width.y = col_limits_width[c]
+ t.border_width.y2 = col_limits_width[c+1]
+
+ return tiles
+
+def compute(props):
+ tiles = make_src_tiles()
+
+ # corners scale easy
+ for t in [tiles[i] for i in [0, 2, 6, 8]]:
+ t.scale = Point(t.border_width.width()/t.slice.width(), t.border_width.height()/t.slice.height())
+ # edges are by their secondary dimension
+ for t in [tiles[i] for i in [1, 7]]:
+ t.scale = Point(t.border_width.height()/t.slice.height(), t.border_width.height()/t.slice.height())
+ for t in [tiles[i] for i in [3, 5]]:
+ t.scale = Point(t.border_width.width()/t.slice.width(), t.border_width.width()/t.slice.width())
+ # the middle is scaled by the factors for the top and left edges
+ tiles[4].scale = Point(tiles[1].scale.x, tiles[3].scale.y)
+
+ # the size of a source tile for the middle section
+ src_tile_size = Size(tiles[4].slice.width()*tiles[4].scale.x, tiles[4].slice.height()*tiles[4].scale.y)
+
+ # the size of a single destination tile in the central part
+ dest_tile_size = Size()
+ if props.repeat == "stretch":
+ dest_tile_size.width = tiles[4].border_width.width()
+ dest_tile_size.height = tiles[4].border_width.height()
+ for t in [tiles[i] for i in [1, 7]]:
+ t.scale.x = t.border_width.width()/t.slice.width()
+ for t in [tiles[i] for i in [3, 5]]:
+ t.scale.y = t.border_width.height()/t.slice.height()
+ elif props.repeat == "repeat":
+ dest_tile_size = src_tile_size
+ elif props.repeat == "round":
+ dest_tile_size.width = tiles[4].border_width.width() / math.ceil(tiles[4].border_width.width() / src_tile_size.width)
+ dest_tile_size.height = tiles[4].border_width.height() / math.ceil(tiles[4].border_width.height() / src_tile_size.height)
+ for t in [tiles[i] for i in [1, 4, 7]]:
+ t.scale.x = dest_tile_size.width/t.slice.width()
+ for t in [tiles[i] for i in [3, 4, 5]]:
+ t.scale.y = dest_tile_size.height/t.slice.height()
+ else:
+ print "Whoops, invalid border-image-repeat value"
+
+ # catch overlapping slices. Its easier to deal with it here than to catch
+ # earlier and have to avoid all the divide by zeroes above
+ for t in tiles:
+ if t.slice.width() < 0:
+ t.scale.x = 0
+ if t.slice.height() < 0:
+ t.scale.y = 0
+
+ tiles_h = int(math.ceil(tiles[4].border_width.width()/dest_tile_size.width)+2)
+ tiles_v = int(math.ceil(tiles[4].border_width.height()/dest_tile_size.height)+2)
+
+ # if border-image-repeat: repeat, then we will later center the tiles, that
+ # means we need an extra tile for the two 'half' tiles at either end
+ if props.repeat == "repeat":
+ if tiles_h % 2 == 0:
+ tiles_h += 1
+ if tiles_v % 2 == 0:
+ tiles_v += 1
+ dest_tiles = [Tile() for i in range(tiles_h * tiles_v)]
+
+ # corners
+ corners = [(0, 0), (tiles_h-1, 2), (tiles_v*(tiles_h-1), 6), (tiles_v*tiles_h-1, 8)]
+ for d,s in corners:
+ dest_tiles[d].size = Size(tiles[s].scale.x*props.size.width, tiles[s].scale.y*props.size.height)
+ dest_tiles[d].dest_size = Size(tiles[s].border_width.width(), tiles[s].border_width.height())
+ dest_tiles[0].offset = Point(0, 0)
+ dest_tiles[tiles_h-1].offset = Point(tiles[2].border_width.width() - dest_tiles[tiles_h-1].size.width, 0)
+ dest_tiles[tiles_v*(tiles_h-1)].offset = Point(0, tiles[6].border_width.height() - dest_tiles[tiles_v*(tiles_h-1)].size.height)
+ dest_tiles[tiles_v*tiles_h-1].offset = Point(tiles[8].border_width.width() - dest_tiles[tiles_h*tiles_v-1].size.width, tiles[8].border_width.height() - dest_tiles[tiles_h*tiles_v-1].size.height)
+
+ # horizontal edges
+ for i in range(1, tiles_h-1):
+ dest_tiles[i].size = Size(tiles[1].scale.x*props.size.width, tiles[1].scale.y*props.size.height)
+ dest_tiles[(tiles_v-1)*tiles_h + i].size = Size(tiles[7].scale.x*props.size.width, tiles[7].scale.y*props.size.height)
+ dest_tiles[i].dest_size = Size(dest_tile_size.width, tiles[1].border_width.height())
+ dest_tiles[(tiles_v-1)*tiles_h + i].dest_size = Size(dest_tile_size.width, tiles[7].border_width.height())
+ dest_tiles[i].offset = Point(-tiles[1].scale.x*tiles[1].slice.x, -tiles[1].scale.y*tiles[1].slice.y)
+ dest_tiles[(tiles_v-1)*tiles_h + i].offset = Point(-tiles[7].scale.x*tiles[7].slice.x, -tiles[7].scale.y*tiles[7].slice.y)
+
+ # vertical edges
+ for i in range(1, tiles_v-1):
+ dest_tiles[i*tiles_h].size = Size(tiles[3].scale.x*props.size.width, tiles[3].scale.y*props.size.height)
+ dest_tiles[(i+1)*tiles_h-1].size = Size(tiles[5].scale.x*props.size.width, tiles[5].scale.y*props.size.height)
+ dest_tiles[i*tiles_h].dest_size = Size(tiles[3].border_width.width(), dest_tile_size.height)
+ dest_tiles[(i+1)*tiles_h-1].dest_size = Size(tiles[5].border_width.width(), dest_tile_size.height)
+ dest_tiles[i*tiles_h].offset = Point(-tiles[3].scale.x*tiles[3].slice.x, -tiles[3].scale.y*tiles[3].slice.y)
+ dest_tiles[(i+1)*tiles_h-1].offset = Point(-tiles[5].scale.x*tiles[5].slice.x, -tiles[5].scale.y*tiles[5].slice.y)
+
+ # middle
+ for i in range(1, tiles_v-1):
+ for j in range(1, tiles_h-1):
+ dest_tiles[i*tiles_h+j].size = Size(tiles[4].scale.x*props.size.width, tiles[4].scale.y*props.size.height)
+ dest_tiles[i*tiles_h+j].offset = Point(-tiles[4].scale.x*tiles[4].slice.x, -tiles[4].scale.y*tiles[4].slice.y)
+ dest_tiles[i*tiles_h+j].dest_size = dest_tile_size
+
+ # edge and middle tiles are centered with border-image-repeat: repeat
+ # we need to change the offset to take account of this and change the dest_size
+ # of the tiles at the sides of the edges if they are clipped
+ if props.repeat == "repeat":
+ diff_h = ((tiles_h-2)*dest_tile_size.width - tiles[4].border_width.width()) / 2
+ diff_v = ((tiles_v-2)*dest_tile_size.height - tiles[4].border_width.height()) / 2
+ for i in range(0, tiles_h):
+ dest_tiles[tiles_h + i].dest_size.height -= diff_v
+ dest_tiles[tiles_h + i].offset.y -= diff_v #* tiles[4].scale.y
+ dest_tiles[(tiles_v-2)*tiles_h + i].dest_size.height -= diff_v
+ for i in range(0, tiles_v):
+ dest_tiles[i*tiles_h + 1].dest_size.width -= diff_h
+ dest_tiles[i*tiles_h + 1].offset.x -= diff_h #* tiles[4].scale.x
+ dest_tiles[(i+1)*tiles_h-2].dest_size.width -= diff_h
+
+ # output the table to simulate the border
+ print "<table>"
+ for i in range(tiles_h):
+ print "<col style=\"width: " + str(dest_tiles[i].dest_size.width) + "px;\">"
+ for i in range(tiles_v):
+ print "<tr style=\"height: " + str(dest_tiles[i*tiles_h].dest_size.height) + "px;\">"
+ for j in range(tiles_h):
+ width = dest_tiles[i*tiles_h+j].size.width
+ height = dest_tiles[i*tiles_h+j].size.height
+ # catch any tiles with negative widths/heights
+ # this happends when the total of the border-image-slices > borde drawing area
+ if width <= 0 or height <= 0:
+ print " <td style=\"background: white;\"></td>"
+ else:
+ print " <td style=\"background-image: " + props.source + "; background-size: " + str(width) + "px " + str(height) + "px; background-position: " + str(dest_tiles[i*tiles_h+j].offset.x) + "px " + str(dest_tiles[i*tiles_h+j].offset.y) + "px;\"></td>"
+ print "</tr>"
+ print "</table>"
+
+
+# start here
+args = sys.argv[1:]
+if len(args) == 0:
+ print "whoops: no source file"
+ exit(1)
+
+
+props = parse(args[0])
+if not check_parse(props):
+ print dir(props)
+ exit(1)
+props = normalise(props)
+if not check_normalise(props):
+ exit(1)
+compute(props)