Python reportlab.pdfbase.pdfmetrics.stringWidth() Examples

def hBoxText(msg, canvas, x, y, fontName):
    """Helper for stringwidth tests on Asian fonts.

    Registers font if needed.  Then draws the string,
    and a box around it derived from the stringWidth function"""
    canvas.saveState()
    try:
        font = pdfmetrics.getFont(fontName)
    except KeyError:
        font = cidfonts.UnicodeCIDFont(fontName)
        pdfmetrics.registerFont(font)

    canvas.setFillGray(0.8)
    canvas.rect(x,y,pdfmetrics.stringWidth(msg, fontName, 16),16,stroke=0,fill=1)
    canvas.setFillGray(0)
    canvas.setFont(fontName, 16,16)
    canvas.drawString(x,y,msg)
    canvas.restoreState() 

def drawString(self, stringObj):
        if self._fill:
            S = self._tracker.getState()
            text_anchor, x, y, text, enc = S['textAnchor'], stringObj.x,stringObj.y,stringObj.text, stringObj.encoding
            if not text_anchor in ['start','inherited']:
                font, font_size = S['fontName'], S['fontSize']
                textLen = stringWidth(text, font, font_size, enc)
                if text_anchor=='end':
                    x -= textLen
                elif text_anchor=='middle':
                    x -= textLen*0.5
                elif text_anchor=='numeric':
                    x -= numericXShift(text_anchor,text,textLen,font,font_size,enc)
                else:
                    raise ValueError, 'bad value for textAnchor '+str(text_anchor)
            t = self._canvas.beginText(x,y)
            t.textLine(text)
            self._canvas.drawText(t) 

def _do_dots_frag(cur_x, cur_x_s, maxWidth, xs, tx):
    text,fontName,fontSize,textColor,backColor,dy = _getDotsInfo(xs.style)
    txtlen = tx._canvas.stringWidth(text, fontName, fontSize)
    if cur_x_s+txtlen<=maxWidth:
        if tx._fontname!=fontName or tx._fontsize!=fontSize:
            tx.setFont(fontName,fontSize)
        maxWidth += getattr(tx,'_dotsOffsetX',tx._x0)
        tx.setTextOrigin(0,xs.cur_y+dy)
        setXPos(tx,cur_x_s-cur_x)
        n = int((maxWidth-cur_x_s)/txtlen)
        setXPos(tx,maxWidth - txtlen*n)
        if xs.textColor!=textColor:
            tx.setFillColor(textColor)
        if backColor: xs.backColors.append((cur_x,maxWidth,backColor))
        tx._textOut(n*text,1)
        if dy: tx.setTextOrigin(tx._x0,xs.cur_y-dy) 

def drawHumanReadable(self):
        if self.humanReadable:
            #we have text
            from reportlab.pdfbase.pdfmetrics import getAscent, stringWidth
            s = str(self._humanText())
            fontSize = self.fontSize
            fontName = self.fontName
            w = stringWidth(s,fontName,fontSize)
            width = self._width
            if self.quiet:
                width -= self.lquiet+self.rquiet
                x = self.lquiet
            else:
                x = 0
            if w>width: fontSize *= width/float(w)
            y = 1.07*getAscent(fontName)*fontSize/1000.
            self.annotate(x+width/2.,-y,s,fontName,fontSize) 

def drawString(self, stringObj):
        if self._fill:
            S = self._tracker.getState()
            text_anchor, x, y, text, enc = S['textAnchor'], stringObj.x,stringObj.y,stringObj.text, stringObj.encoding
            if not text_anchor in ['start','inherited']:
                font, font_size = S['fontName'], S['fontSize']
                textLen = stringWidth(text, font, font_size, enc)
                if text_anchor=='end':
                    x -= textLen
                elif text_anchor=='middle':
                    x -= textLen*0.5
                elif text_anchor=='numeric':
                    x -= numericXShift(text_anchor,text,textLen,font,font_size,enc)
                else:
                    raise ValueError('bad value for textAnchor '+str(text_anchor))
            t = self._canvas.beginText(x,y)
            t.textLine(text)
            self._canvas.drawText(t) 

def _do_dots_frag(cur_x, cur_x_s, maxWidth, xs, tx):
    text,fontName,fontSize,textColor,backColor,dy = _getDotsInfo(xs.style)
    txtlen = tx._canvas.stringWidth(text, fontName, fontSize)
    if cur_x_s+txtlen<=maxWidth:
        if tx._fontname!=fontName or tx._fontsize!=fontSize:
            tx.setFont(fontName,fontSize)
        maxWidth += getattr(tx,'_dotsOffsetX',tx._x0)
        tx.setTextOrigin(0,xs.cur_y+dy)
        setXPos(tx,cur_x_s-cur_x)
        n = int((maxWidth-cur_x_s)/txtlen)
        setXPos(tx,maxWidth - txtlen*n)
        if xs.textColor!=textColor:
            tx.setFillColor(textColor)
        if backColor: xs.backColors.append((cur_x,maxWidth,backColor))
        tx._textOut(n*text,1)
        if dy: tx.setTextOrigin(tx._x0,xs.cur_y-dy) 

def _handleBulletWidth(bulletText,style,maxWidths):
    '''work out bullet width and adjust maxWidths[0] if neccessary
    '''
    if bulletText:
        if isinstance(bulletText,basestring):
            bulletWidth = stringWidth( bulletText, style.bulletFontName, style.bulletFontSize)
        else:
            #it's a list of fragments
            bulletWidth = 0
            for f in bulletText:
                bulletWidth = bulletWidth + stringWidth(f.text, f.fontName, f.fontSize)
        bulletRight = style.bulletIndent + bulletWidth + 0.6 * style.bulletFontSize
        indent = style.leftIndent+style.firstLineIndent
        if bulletRight > indent:
            #..then it overruns, and we have less space available on line 1
            maxWidths[0] -= (bulletRight - indent) 

def drawHumanReadable(self):
        if self.humanReadable:
            #we have text
            from reportlab.pdfbase.pdfmetrics import getAscent, stringWidth
            s = str(self._humanText())
            fontSize = self.fontSize
            fontName = self.fontName
            w = stringWidth(s,fontName,fontSize)
            width = self._width
            if self.quiet:
                width -= self.lquiet+self.rquiet
                x = self.lquiet
            else:
                x = 0
            if w>width: fontSize *= width/float(w)
            y = 1.07*getAscent(fontName)*fontSize/1000.
            self.annotate(x+width/2.,-y,s,fontName,fontSize) 

def _handleBulletWidth(bulletText,style,maxWidths):
    '''work out bullet width and adjust maxWidths[0] if neccessary
    '''
    if bulletText:
        if isinstance(bulletText,strTypes):
            bulletWidth = stringWidth( bulletText, style.bulletFontName, style.bulletFontSize)
        else:
            #it's a list of fragments
            bulletWidth = 0
            for f in bulletText:
                bulletWidth += stringWidth(f.text, f.fontName, f.fontSize)
        bulletLen = style.bulletIndent + bulletWidth + 0.6 * style.bulletFontSize
        if style.wordWrap=='RTL':
            indent = style.rightIndent+style.firstLineIndent
        else:
            indent = style.leftIndent+style.firstLineIndent
        if bulletLen > indent:
            #..then it overruns, and we have less space available on line 1
            maxWidths[0] -= (bulletLen - indent) 

def hBoxText(msg, canvas, x, y, fontName):
    """Helper for stringwidth tests on Asian fonts.

    Registers font if needed.  Then draws the string,
    and a box around it derived from the stringWidth function"""
    canvas.saveState()
    try:
        font = pdfmetrics.getFont(fontName)
    except KeyError:
        font = cidfonts.UnicodeCIDFont(fontName)
        pdfmetrics.registerFont(font)

    canvas.setFillGray(0.8)
    canvas.rect(x,y,pdfmetrics.stringWidth(msg, fontName, 16),16,stroke=0,fill=1)
    canvas.setFillGray(0)
    canvas.setFont(fontName, 16,16)
    canvas.drawString(x,y,msg)
    canvas.restoreState() 

def _text2PathDescription(text, x=0, y=0, fontName=_baseGFontName, fontSize=1000,
                            anchor='start', truncate=1, pathReverse=0):
    global _gs
    if not _gs:
        import _renderPM
        _gs = _renderPM.gstate(1,1)
    from reportlab.graphics import renderPM
    renderPM._setFont(_gs,fontName,fontSize)
    P = []
    if not anchor=='start':
        textLen = stringWidth(text, fontName,fontSize)
        if anchor=='end':
            x = x-textLen
        elif anchor=='middle':
            x = x - textLen/2.
    for g in _gs._stringPath(text,x,y):
        P.extend(_processGlyph(g,truncate=truncate,pathReverse=pathReverse))
    return P 

def _getWidths(i,s, fontName, fontSize, subCols):
    S = []
    aS = S.append
    if isSeq(s):
        for j,t in enumerate(s):
            sc = subCols[j,i]
            fN = getattr(sc,'fontName',fontName)
            fS = getattr(sc,'fontSize',fontSize)
            m = [stringWidth(x, fN, fS) for x in t.split('\n')]
            m = max(sc.minWidth,m and max(m) or 0)
            aS(m)
            aS(sc.rpad)
        del S[-1]
    else:
        sc = subCols[0,i]
        fN = getattr(sc,'fontName',fontName)
        fS = getattr(sc,'fontSize',fontSize)
        m = [stringWidth(x, fN, fS) for x in s.split('\n')]
        aS(max(sc.minWidth,m and max(m) or 0))
    return S 

def _getWidths(i,s, fontName, fontSize, subCols):
    S = []
    aS = S.append
    if isSeqType(s):
        for j,t in enumerate(s):
            sc = subCols[j,i]
            fN = getattr(sc,'fontName',fontName)
            fS = getattr(sc,'fontSize',fontSize)
            m = [stringWidth(x, fN, fS) for x in t.split('\n')]
            m = max(sc.minWidth,m and max(m) or 0)
            aS(m)
            aS(sc.rpad)
        del S[-1]
    else:
        sc = subCols[0,i]
        fN = getattr(sc,'fontName',fontName)
        fS = getattr(sc,'fontSize',fontSize)
        m = [stringWidth(x, fN, fS) for x in s.split('\n')]
        aS(max(sc.minWidth,m and max(m) or 0))
    return S 

def makeCircularString(x, y, radius, angle, text, fontName, fontSize, inside=0, G=None,textAnchor='start'):
    '''make a group with circular text in it'''
    if not G: G = Group()

    angle %= 360
    pi180 = pi/180
    phi = angle*pi180
    width = stringWidth(text, fontName, fontSize)
    sig = inside and -1 or 1
    hsig = sig*0.5
    sig90 = sig*90

    if textAnchor!='start':
        if textAnchor=='middle':
            phi += sig*(0.5*width)/radius
        elif textAnchor=='end':
            phi += sig*float(width)/radius
        elif textAnchor=='numeric':
            phi += sig*float(numericXShift(textAnchor,text,width,fontName,fontSize,None))/radius

    for letter in text:
        width = stringWidth(letter, fontName, fontSize)
        beta = float(width)/radius
        h = Group()
        h.add(String(0, 0, letter, fontName=fontName,fontSize=fontSize,textAnchor="start"))
        h.translate(x+cos(phi)*radius,y+sin(phi)*radius)    #translate to radius and angle
        h.rotate((phi-hsig*beta)/pi180-sig90)               # rotate as needed
        G.add(h)                                            #add to main group
        phi -= sig*beta                                     #increment

    return G 

def __new__(cls,value,frag,encoding):
        self = unicode.__new__(cls,value)
        self._frag = frag
        if hasattr(frag,'cbDefn'):
            w = getattr(frag.cbDefn,'width',0)
            self._width = w
        else:
            self._width = stringWidth(value,frag.fontName,frag.fontSize)
        return self 

def _header_footer(self, canvas, doc):
        # Save the state of our canvas so we can draw on it
        canvas.saveState()
        
        style_right = ParagraphStyle(name='right', parent=self.bodystyle, fontName='arialuni',
                fontSize=10, alignment=TA_RIGHT)
        
        fieldsight_logo = Image('http://' + self.base_url +'/static/images/fs1.jpg')
        fieldsight_logo._restrictSize(1.5 * inch, 1.5 * inch)
        

        # headerleft = Paragraph("FieldSight", self.bodystyle)
        headerright = Paragraph(self.project_name, style_right)

        # w1, h1 = headerleft.wrap(doc.width, doc.topMargin)
        w2, h2 = headerright.wrap(doc.width, doc.topMargin)

        textWidth = stringWidth(self.project_name, fontName='arialuni',
                fontSize=10) 
        
        fieldsight_logo.drawOn(canvas, doc.leftMargin, doc.height + doc.topMargin + 12)
        headerright.drawOn(canvas, doc.leftMargin, doc.height + doc.topMargin + 20)
        try:
            project_logo = Image(self.project_logo)
            project_logo._restrictSize(0.4 * inch, 0.4 * inch)
            project_logo.drawOn(canvas, headerright.width + doc.leftMargin -0.5 * inch - textWidth, doc.height + doc.topMargin + 10)
        except:
            pass        
        # header.drawOn(canvas, doc.leftMargin + doc.width, doc.height + doc.topMargin +20)
        
        # Footer
        footer = Paragraph('Page no. '+str(canvas._pageNumber), style_right)
        w, h = footer.wrap(doc.width, doc.bottomMargin)
        footer.drawOn(canvas, doc.leftMargin, h + 40)
 
        # Release the canvas
        canvas.restoreState() 

def draw_footer(canvas, font_size, y):
    text1 = 'Created with ' + PROGRAM_FULLNAME;
    text2 = PROGRAM_WEBSITE;
    text2_w = stringWidth(text2, FONT_NAME, FOOTER_FONT_SIZE);
    text2_x = PAGE_SIZE[0]-GRID_OFFSET-text2_w;
    canvas.setFont(FONT_NAME, font_size);
    canvas.drawString(GRID_OFFSET, y, text1);
    canvas.drawString(text2_x, y, text2);
    y -= 0.2*FONT_SIZE;
    canvas.linkURL('www.' + text2, (text2_x, y, \
                    text2_x + text2_w, y + 0.8*FONT_SIZE)); 

def getCharWidths(word, fontName, fontSize):
    """Returns a list of glyph widths.  Should be easy to optimize in _rl_accel

    >>> getCharWidths('Hello', 'Courier', 10)
    [6.0, 6.0, 6.0, 6.0, 6.0]
    >>> from reportlab.pdfbase.cidfonts import UnicodeCIDFont
    >>> from reportlab.pdfbase.pdfmetrics import registerFont
    >>> registerFont(UnicodeCIDFont('HeiseiMin-W3'))
    >>> getCharWidths(u'\u6771\u4EAC', 'HeiseiMin-W3', 10)   #most kanji are 100 ems
    [10.0, 10.0]
    """
    #character-level function call; the performance is going to SUCK

    return [stringWidth(uChar, fontName, fontSize) for uChar in word] 

def _sw(self,f=None,l=None):
        text = self._text
        if f is None: f = 0
        if l is None: l = len(text)
        return stringWidth(text[f:l],self._fontName,self._fontSize) 

def minWidth(self):
        'Attempt to determine a minimum sensible width'
        frags = self.frags
        nFrags= len(frags)
        if not nFrags: return 0
        if nFrags==1:
            f = frags[0]
            fS = f.fontSize
            fN = f.fontName
            words = hasattr(f,'text') and split(f.text, ' ') or f.words
            func = lambda w, fS=fS, fN=fN: stringWidth(w,fN,fS)
        else:
            words = _getFragWords(frags)
            func  = lambda x: x[0]
        return max(map(func,words)) 

def _posting_list_footer(self, pdf, width, x1, y1, x2, y2):
        canvas = pdf.canvas

        canvas.rect(x1, y1, width, 38 * mm)
        canvas.setFont("Helvetica-Bold", size=9)
        canvas.drawCentredString(x2 - (width / 2), y1 + 38 * mm - 10, self.footer_title_text)
        canvas.setFont("Helvetica", size=8)
        canvas.drawString(x1 + 2 * mm, y1 + 28 * mm, self.footer_disclaimer)
        text_width = stringWidth(self.footer_stamp_text, "Helvetica", 8)
        canvas.drawString(x2 - 2 * mm - text_width, y1 + 28 * mm, self.footer_stamp_text)
        text = Paragraph(self.footer_signature_text, style=self.signature_style)
        text.wrap(stringWidth(self.footer_disclaimer, "Helvetica", 8), 10 * mm)
        text.drawOn(canvas, x1 + 2 * mm, y1 + 2 * mm)

    # noinspection PyUnusedLocal 

def stringWidth(self, text, fontName=None, fontSize=None):
        "gets width of a string in the given font and size"
        return pdfmetrics.stringWidth(text, fontName or self._fontname,
                                    (fontSize,self._fontsize)[fontSize is None])

    # basic graphics modes 

def drawRightString(self, x, y, text, mode=None):
        """Draws a string right-aligned with the x coordinate"""
        width = self.stringWidth(text, self._fontname, self._fontsize)
        t = self.beginText(x - width, y)
        if mode is not None: t.setTextRenderMode(mode)
        t.textLine(text)
        self.drawText(t) 

def width(self, engine):
        from reportlab.pdfbase.pdfmetrics import stringWidth
        content = self.content
        if not content:
            content = []
        tuple = (self.tagname, self.attdict, content, self.extra)
        op = self.op = self.getOp(tuple, engine)
        #print op.__class__
        #print op.pcontent
        #print self
        s = str(op)
        return stringWidth(s, engine.fontName, engine.fontSize) 

def numericXShift(tA,text,w,fontName,fontSize,encoding=None,pivotCharacter='.'):
    dp = getattr(tA,'_dp',pivotCharacter)
    i = text.rfind(dp)
    if i>=0:
        dpOffs = getattr(tA,'_dpLen',0)
        w = dpOffs + stringWidth(text[:i],fontName,fontSize,encoding)
    return w 

def getDrawing09():
    """This tests rotated strings

    Some renderers will have a separate mechanism for font drawing.  This test
    just makes sure strings get transformed the same way as regular graphics."""
    D = Drawing(400, 200)

    fontName = _FONTS[0]
    fontSize = 12
    text = "I should be totally horizontal and enclosed in a box"
    textWidth = stringWidth(text, fontName, fontSize)


    g1 = Group(
            String(20, 20, text, fontName=fontName, fontSize = fontSize),
            Rect(18, 18, textWidth + 4, fontSize + 4, fillColor=None)
            )
    D.add(g1)

    text = "I should slope up by 15 degrees, so my right end is higher than my left"
    textWidth = stringWidth(text, fontName, fontSize)
    g2 = Group(
            String(20, 20, text, fontName=fontName, fontSize = fontSize),
            Rect(18, 18, textWidth + 4, fontSize + 4, fillColor=None)
            )
    g2.translate(0, 50)
    g2.rotate(15)
    D.add(g2)

    return D 

def _maxWidth(T, fontName, fontSize):
    '''return max stringWidth for the list of strings T'''
    if type(T) not in (type(()),type([])): T = (T,)
    T = filter(None,T)
    return T and max(map(lambda t,sW=stringWidth,fN=fontName, fS=fontSize: sW(t,fN,fS),T)) or 0 

def getBounds(self):
        # assumes constant drop of 0.2*size to baseline
        t = self.text
        w = stringWidth(t,self.fontName,self.fontSize,self.encoding)
        tA = self.textAnchor
        x = self.x
        if tA!='start':
            if tA=='middle':
                x -= 0.5*w
            elif tA=='end':
                x -= w
            elif tA=='numeric':
                x -= numericXShift(tA,t,w,self.fontName,self.fontSize,self.encoding)
        return (x, self.y - 0.2 * self.fontSize, x+w, self.y + self.fontSize) 

def _textBoxLimits(text, font, fontSize, leading, textAnchor, boxAnchor):
    w = 0
    for t in text:
        w = max(w,stringWidth(t,font, fontSize))

    h = len(text)*leading
    yt = fontSize
    if boxAnchor[0]=='s':
        yb = -h
        yt = yt - h
    elif boxAnchor[0]=='n':
        yb = 0
    else:
        yb = -h/2.0
        yt = yt + yb

    if boxAnchor[-1]=='e':
        xb = -w
        if textAnchor=='end': xt = 0
        elif textAnchor=='start': xt = -w
        else: xt = -w/2.0
    elif boxAnchor[-1]=='w':
        xb = 0
        if textAnchor=='end': xt = w
        elif textAnchor=='start': xt = 0
        else: xt = w/2.0
    else:
        xb = -w/2.0
        if textAnchor=='end': xt = -xb
        elif textAnchor=='start': xt = xb
        else: xt = 0

    return xb, yb, w, h, xt, yt 

def getEast(self):
        return self.x + stringWidth(self.text,self.fontName,self.fontSize, self.encoding)