class MathSubSuperscript(MultiItem):
"""An item with a subscript"""
def __init__(self, base, subscript = None, superscript = None):
MultiItem.__init__(self)
self.appendItem(base)
self.base = base
self.subscript = subscript
self.superscript = superscript
if subscript:
subscript.scaleFont(0.8)
self.appendItem(subscript)
if superscript:
superscript.scaleFont(0.8)
self.appendItem(superscript)
def resizePDF(self, pdf, x = 0, y = 0):
self.resizeItemsPDF(pdf, x, y)
dx = pdf.get_string_width(' ') * self.style[1]
self.rect = Rect(x,y,x,y)
h = self.base.rect.height()
w = self.base.rect.width() + dx
if self.subscript:
self.subscript.rect.translate(w, h*0.5)
self.rect.unite(self.subscript.rect)
if self.superscript:
self.superscript.rect.translate(w, - h*0.5)
self.rect.unite(self.superscript.rect)
self.refit()
class MathPower(MultiItem):
"""Container for inline maths"""
def __init__(self):
MultiItem.__init__(self)
self.style = 'math-var', 1
def resizePDF(self, pdf, x = 0, y = 0):
if len(self.items) < 2 or not self.items[0] or not self.items[1]:
raise Exception('MathPower must have two items.')
self.rect = Rect(x,y,x,y)
dx = pdf.get_string_width(' ') * self.style[1]
base = self.items[0]
if hasattr(base,'style'):
setFontPDF(pdf, base.style, self.styles)
base.resizePDF(pdf,x,y)
index = self.items[1]
index.scaleFont(0.8)
if hasattr(index,'style'):
setFontPDF(pdf, index.style, self.styles)
index.resizePDF(pdf, base.rect.x1() + dx, y - base.rect.height() * 0.4)
self.rect.unite(base.rect)
self.rect.unite(index.rect)
self.refit()
class InlineMathBlock(MultiItem):
"""Container for inline maths"""
def __init__(self, *items):
MultiItem.__init__(self)
self.style = ('math-var',1)
for item in items:
self.appendItem(item)
def resizePDF(self, pdf, x = 0, y = 0):
self.rect = Rect(x,y,x,y)
dx = pdf.get_string_width(' ')
dx *= self.style[1]
rectList = []
width = 0.0
style = ''
for item in self.items:
if item:
if hasattr(item,'style') and item.style != style:
setFontPDF(pdf, item.style, self.styles)
item.resizePDF(pdf,x,y)
rectList.append(item.rect)
width += item.rect.width() + dx
rect.alignLeft(rectList, x, x+width, dx)
for r in rectList:
self.rect.unite(r)
self.refit()
class MathFrac(MultiItem):
"""Container for inline maths"""
def __init__(self, num = None, denom = None):
MultiItem.__init__(self)
self.style = 'math-var', 1
if num:
if not denom:
denom = MathNumber('1')
self.appendItem(num)
self.appendItem(denom)
def resizePDF(self, pdf, x = 0, y = 0):
if len(self.items) < 2 or not self.items[0] or not self.items[1]:
raise Exception('MathFrac must have two items.')
self.rect = Rect(x,y,x,y)
dx = pdf.get_string_width(' ') * self.style[1]
self.margins.set(dx, 0.0)
setFontPDF(pdf, self.style, self.styles)
lineHeight = pdf.font_size_pt / pdf.k
numerator = self.items[0]
if hasattr(numerator,'style'):
setFontPDF(pdf, numerator.style, self.styles)
numerator.resizePDF(pdf,x + dx, y - lineHeight * 0.5)
denominator = self.items[1]
if hasattr(denominator,'style'):
setFontPDF(pdf, denominator.style, self.styles)
denominator.resizePDF(pdf, x + dx, numerator.rect.y1())
if numerator.rect.width() > denominator.rect.width():
denominator.rect.alignXCenter(numerator.rect)
else:
numerator.rect.alignXCenter(denominator.rect)
self.rect.unite(numerator.rect)
self.rect.unite(denominator.rect)
self.rect.adjust(rect.Point(0,0),rect.Point(dx,0))
def cellPDF(self, pdf, r = None):
MultiItem.cellPDF(self, pdf, r)
y = self.items[0].rect.y1()
pdf.set_line_width(0.2)
if r:
x_shift = r.x0()
y_shift = r.y0()
else:
x_shift = 0.0
y_shift = 0.0
pdf.line(self.rect.x0() - x_shift, y - y_shift, self.rect.x1() - x_shift, y - y_shift)
class MathColumn(MultiItem):
"""Container for inline maths"""
def __init__(self, *items):
MultiItem.__init__(self)
self.style = ('math-var',1)
for item in items:
self.appendItem(item)
def resizePDF(self, pdf, x = 0, y = 0):
self.rect = Rect(x,y,x,y)
for item in self.items:
self.setFontPDF(pdf, item)
item.resizePDF(pdf,x,y)
item.rect.translate(0,self.rect.height())
self.rect.unite(item.rect)
self.refit()
class MathBelowAndAbove(MultiItem):
"""Can have up to 3 items: first is placed inline with the text,
if there is a second item it's placed below the first,
if there is a third item it's placed above the first.
"""
def __init__(self,base = None, below = None, above = None):
MultiItem.__init__(self)
self.style = 'math-var', 1
if base:
self.appendItem(base)
if below:
self.appendItem(below)
if above:
self.appendItem(above)
else:
if above:
self.appendItem(None)
self.appendItem(above)
def resizePDF(self, pdf, x = 0, y = 0):
if len(self.items) == 0:
raise Exception('MathAboveAndBelow must have at least one item.')
self.rect = Rect(x,y,x,y)
base = self.items[0]
self.setFontPDF(pdf, base)
base.resizePDF(pdf,x,y)
self.rect.unite(base.rect)
if len(self.items) > 1 and self.items[1]:
below = self.items[1]
self.setFontPDF(pdf, below)
below.resizePDF(pdf,x,y)
below.rect.translate(0, base.rect.height())
below.rect.alignXCenter( base.rect )
self.rect.unite(below.rect)
if len(self.items) > 2 and self.items[2]:
above = self.items[2]
self.setFontPDF(pdf, above)
above.resizePDF(pdf,x,y)
above.rect.translate(0, - above.rect.height())
above.rect.alignXCenter( base.rect )
self.rect.unite(above.rect)
self.refit()
