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Diffstat (limited to 'Demo/tkinter/www/fmt.py')
| -rwxr-xr-x | Demo/tkinter/www/fmt.py | 627 |
1 files changed, 0 insertions, 627 deletions
diff --git a/Demo/tkinter/www/fmt.py b/Demo/tkinter/www/fmt.py deleted file mode 100755 index b5ca33c..0000000 --- a/Demo/tkinter/www/fmt.py +++ /dev/null @@ -1,627 +0,0 @@ -# Text formatting abstractions - - -import string -import Para - - -# A formatter back-end object has one method that is called by the formatter: -# addpara(p), where p is a paragraph object. For example: - - -# Formatter back-end to do nothing at all with the paragraphs -class NullBackEnd: - # - def __init__(self): - pass - # - def addpara(self, p): - pass - # - def bgn_anchor(self, id): - pass - # - def end_anchor(self, id): - pass - - -# Formatter back-end to collect the paragraphs in a list -class SavingBackEnd(NullBackEnd): - # - def __init__(self): - self.paralist = [] - # - def addpara(self, p): - self.paralist.append(p) - # - def hitcheck(self, h, v): - hits = [] - for p in self.paralist: - if p.top <= v <= p.bottom: - for id in p.hitcheck(h, v): - if id not in hits: - hits.append(id) - return hits - # - def extract(self): - text = '' - for p in self.paralist: - text = text + (p.extract()) - return text - # - def extractpart(self, long1, long2): - if long1 > long2: long1, long2 = long2, long1 - para1, pos1 = long1 - para2, pos2 = long2 - text = '' - while para1 < para2: - ptext = self.paralist[para1].extract() - text = text + ptext[pos1:] - pos1 = 0 - para1 = para1 + 1 - ptext = self.paralist[para2].extract() - return text + ptext[pos1:pos2] - # - def whereis(self, d, h, v): - total = 0 - for i in range(len(self.paralist)): - p = self.paralist[i] - result = p.whereis(d, h, v) - if result <> None: - return i, result - return None - # - def roundtowords(self, long1, long2): - i, offset = long1 - text = self.paralist[i].extract() - while offset > 0 and text[offset-1] <> ' ': offset = offset-1 - long1 = i, offset - # - i, offset = long2 - text = self.paralist[i].extract() - n = len(text) - while offset < n-1 and text[offset] <> ' ': offset = offset+1 - long2 = i, offset - # - return long1, long2 - # - def roundtoparagraphs(self, long1, long2): - long1 = long1[0], 0 - long2 = long2[0], len(self.paralist[long2[0]].extract()) - return long1, long2 - - -# Formatter back-end to send the text directly to the drawing object -class WritingBackEnd(NullBackEnd): - # - def __init__(self, d, width): - self.d = d - self.width = width - self.lineno = 0 - # - def addpara(self, p): - self.lineno = p.render(self.d, 0, self.lineno, self.width) - - -# A formatter receives a stream of formatting instructions and assembles -# these into a stream of paragraphs on to a back-end. The assembly is -# parametrized by a text measurement object, which must match the output -# operations of the back-end. The back-end is responsible for splitting -# paragraphs up in lines of a given maximum width. (This is done because -# in a windowing environment, when the window size changes, there is no -# need to redo the assembly into paragraphs, but the splitting into lines -# must be done taking the new window size into account.) - - -# Formatter base class. Initialize it with a text measurement object, -# which is used for text measurements, and a back-end object, -# which receives the completed paragraphs. The formatting methods are: -# setfont(font) -# setleftindent(nspaces) -# setjust(type) where type is 'l', 'c', 'r', or 'lr' -# flush() -# vspace(nlines) -# needvspace(nlines) -# addword(word, nspaces) -class BaseFormatter: - # - def __init__(self, d, b): - # Drawing object used for text measurements - self.d = d - # - # BackEnd object receiving completed paragraphs - self.b = b - # - # Parameters of the formatting model - self.leftindent = 0 - self.just = 'l' - self.font = None - self.blanklines = 0 - # - # Parameters derived from the current font - self.space = d.textwidth(' ') - self.line = d.lineheight() - self.ascent = d.baseline() - self.descent = self.line - self.ascent - # - # Parameter derived from the default font - self.n_space = self.space - # - # Current paragraph being built - self.para = None - self.nospace = 1 - # - # Font to set on the next word - self.nextfont = None - # - def newpara(self): - return Para.Para() - # - def setfont(self, font): - if font == None: return - self.font = self.nextfont = font - d = self.d - d.setfont(font) - self.space = d.textwidth(' ') - self.line = d.lineheight() - self.ascent = d.baseline() - self.descent = self.line - self.ascent - # - def setleftindent(self, nspaces): - self.leftindent = int(self.n_space * nspaces) - if self.para: - hang = self.leftindent - self.para.indent_left - if hang > 0 and self.para.getlength() <= hang: - self.para.makehangingtag(hang) - self.nospace = 1 - else: - self.flush() - # - def setrightindent(self, nspaces): - self.rightindent = int(self.n_space * nspaces) - if self.para: - self.para.indent_right = self.rightindent - self.flush() - # - def setjust(self, just): - self.just = just - if self.para: - self.para.just = self.just - # - def flush(self): - if self.para: - self.b.addpara(self.para) - self.para = None - if self.font <> None: - self.d.setfont(self.font) - self.nospace = 1 - # - def vspace(self, nlines): - self.flush() - if nlines > 0: - self.para = self.newpara() - tuple = None, '', 0, 0, 0, int(nlines*self.line), 0 - self.para.words.append(tuple) - self.flush() - self.blanklines = self.blanklines + nlines - # - def needvspace(self, nlines): - self.flush() # Just to be sure - if nlines > self.blanklines: - self.vspace(nlines - self.blanklines) - # - def addword(self, text, space): - if self.nospace and not text: - return - self.nospace = 0 - self.blanklines = 0 - if not self.para: - self.para = self.newpara() - self.para.indent_left = self.leftindent - self.para.just = self.just - self.nextfont = self.font - space = int(space * self.space) - self.para.words.append(self.nextfont, text, \ - self.d.textwidth(text), space, space, \ - self.ascent, self.descent) - self.nextfont = None - # - def bgn_anchor(self, id): - if not self.para: - self.nospace = 0 - self.addword('', 0) - self.para.bgn_anchor(id) - # - def end_anchor(self, id): - if not self.para: - self.nospace = 0 - self.addword('', 0) - self.para.end_anchor(id) - # - def hrule(self): - # Typically need to override this for bit-mapped displays - self.flush() - self.addword('-'*60, 0) - self.flush() - - -# Measuring object for measuring text as viewed on a tty -class NullMeasurer: - # - def __init__(self): - pass - # - def setfont(self, font): - pass - # - def textwidth(self, text): - return len(text) - # - def lineheight(self): - return 1 - # - def baseline(self): - return 0 - - -# Drawing object for writing plain ASCII text to a file -class FileWriter: - # - def __init__(self, fp): - self.fp = fp - self.lineno, self.colno = 0, 0 - # - def setfont(self, font): - pass - # - def text(self, (h, v), str): - if not str: return - if '\n' in str: - raise ValueError, 'can\'t write \\n' - while self.lineno < v: - self.fp.write('\n') - self.colno, self.lineno = 0, self.lineno + 1 - while self.lineno > v: - # XXX This should never happen... - self.fp.write('\033[A') # ANSI up arrow - self.lineno = self.lineno - 1 - if self.colno < h: - self.fp.write(' ' * (h - self.colno)) - elif self.colno > h: - self.fp.write('\b' * (self.colno - h)) - self.colno = h - self.fp.write(str) - self.colno = h + len(str) - - -# Formatting class to do nothing at all with the data -class NullFormatter(BaseFormatter): - # - def __init__(self): - d = NullMeasurer() - b = NullBackEnd() - BaseFormatter.__init__(self, d, b) - - -# Formatting class to write directly to a file -class WritingFormatter(BaseFormatter): - # - def __init__(self, fp, width): - dm = NullMeasurer() - dw = FileWriter(fp) - b = WritingBackEnd(dw, width) - BaseFormatter.__init__(self, dm, b) - self.blanklines = 1 - # - # Suppress multiple blank lines - def needvspace(self, nlines): - BaseFormatter.needvspace(self, min(1, nlines)) - - -# A "FunnyFormatter" writes ASCII text with a twist: *bold words*, -# _italic text_ and _underlined words_, and `quoted text'. -# It assumes that the fonts are 'r', 'i', 'b', 'u', 'q': (roman, -# italic, bold, underline, quote). -# Moreover, if the font is in upper case, the text is converted to -# UPPER CASE. -class FunnyFormatter(WritingFormatter): - # - def flush(self): - if self.para: finalize(self.para) - WritingFormatter.flush(self) - - -# Surrounds *bold words* and _italic text_ in a paragraph with -# appropriate markers, fixing the size (assuming these characters' -# width is 1). -openchar = \ - {'b':'*', 'i':'_', 'u':'_', 'q':'`', 'B':'*', 'I':'_', 'U':'_', 'Q':'`'} -closechar = \ - {'b':'*', 'i':'_', 'u':'_', 'q':'\'', 'B':'*', 'I':'_', 'U':'_', 'Q':'\''} -def finalize(para): - oldfont = curfont = 'r' - para.words.append('r', '', 0, 0, 0, 0) # temporary, deleted at end - for i in range(len(para.words)): - fo, te, wi = para.words[i][:3] - if fo <> None: curfont = fo - if curfont <> oldfont: - if closechar.has_key(oldfont): - c = closechar[oldfont] - j = i-1 - while j > 0 and para.words[j][1] == '': j = j-1 - fo1, te1, wi1 = para.words[j][:3] - te1 = te1 + c - wi1 = wi1 + len(c) - para.words[j] = (fo1, te1, wi1) + \ - para.words[j][3:] - if openchar.has_key(curfont) and te: - c = openchar[curfont] - te = c + te - wi = len(c) + wi - para.words[i] = (fo, te, wi) + \ - para.words[i][3:] - if te: oldfont = curfont - else: oldfont = 'r' - if curfont in string.uppercase: - te = string.upper(te) - para.words[i] = (fo, te, wi) + para.words[i][3:] - del para.words[-1] - - -# Formatter back-end to draw the text in a window. -# This has an option to draw while the paragraphs are being added, -# to minimize the delay before the user sees anything. -# This manages the entire "document" of the window. -class StdwinBackEnd(SavingBackEnd): - # - def __init__(self, window, drawnow): - self.window = window - self.drawnow = drawnow - self.width = window.getwinsize()[0] - self.selection = None - self.height = 0 - window.setorigin(0, 0) - window.setdocsize(0, 0) - self.d = window.begindrawing() - SavingBackEnd.__init__(self) - # - def finish(self): - self.d.close() - self.d = None - self.window.setdocsize(0, self.height) - # - def addpara(self, p): - self.paralist.append(p) - if self.drawnow: - self.height = \ - p.render(self.d, 0, self.height, self.width) - else: - p.layout(self.width) - p.left = 0 - p.top = self.height - p.right = self.width - p.bottom = self.height + p.height - self.height = p.bottom - # - def resize(self): - self.window.change((0, 0), (self.width, self.height)) - self.width = self.window.getwinsize()[0] - self.height = 0 - for p in self.paralist: - p.layout(self.width) - p.left = 0 - p.top = self.height - p.right = self.width - p.bottom = self.height + p.height - self.height = p.bottom - self.window.change((0, 0), (self.width, self.height)) - self.window.setdocsize(0, self.height) - # - def redraw(self, area): - d = self.window.begindrawing() - (left, top), (right, bottom) = area - d.erase(area) - d.cliprect(area) - for p in self.paralist: - if top < p.bottom and p.top < bottom: - v = p.render(d, p.left, p.top, p.right) - if self.selection: - self.invert(d, self.selection) - d.close() - # - def setselection(self, new): - if new: - long1, long2 = new - pos1 = long1[:3] - pos2 = long2[:3] - new = pos1, pos2 - if new <> self.selection: - d = self.window.begindrawing() - if self.selection: - self.invert(d, self.selection) - if new: - self.invert(d, new) - d.close() - self.selection = new - # - def getselection(self): - return self.selection - # - def extractselection(self): - if self.selection: - a, b = self.selection - return self.extractpart(a, b) - else: - return None - # - def invert(self, d, region): - long1, long2 = region - if long1 > long2: long1, long2 = long2, long1 - para1, pos1 = long1 - para2, pos2 = long2 - while para1 < para2: - self.paralist[para1].invert(d, pos1, None) - pos1 = None - para1 = para1 + 1 - self.paralist[para2].invert(d, pos1, pos2) - # - def search(self, prog): - import regex, string - if type(prog) == type(''): - prog = regex.compile(string.lower(prog)) - if self.selection: - iold = self.selection[0][0] - else: - iold = -1 - hit = None - for i in range(len(self.paralist)): - if i == iold or i < iold and hit: - continue - p = self.paralist[i] - text = string.lower(p.extract()) - if prog.search(text) >= 0: - a, b = prog.regs[0] - long1 = i, a - long2 = i, b - hit = long1, long2 - if i > iold: - break - if hit: - self.setselection(hit) - i = hit[0][0] - p = self.paralist[i] - self.window.show((p.left, p.top), (p.right, p.bottom)) - return 1 - else: - return 0 - # - def showanchor(self, id): - for i in range(len(self.paralist)): - p = self.paralist[i] - if p.hasanchor(id): - long1 = i, 0 - long2 = i, len(p.extract()) - hit = long1, long2 - self.setselection(hit) - self.window.show( \ - (p.left, p.top), (p.right, p.bottom)) - break - - -# GL extensions - -class GLFontCache: - # - def __init__(self): - self.reset() - self.setfont('') - # - def reset(self): - self.fontkey = None - self.fonthandle = None - self.fontinfo = None - self.fontcache = {} - # - def close(self): - self.reset() - # - def setfont(self, fontkey): - if fontkey == '': - fontkey = 'Times-Roman 12' - elif ' ' not in fontkey: - fontkey = fontkey + ' 12' - if fontkey == self.fontkey: - return - if self.fontcache.has_key(fontkey): - handle = self.fontcache[fontkey] - else: - import string - i = string.index(fontkey, ' ') - name, sizestr = fontkey[:i], fontkey[i:] - size = eval(sizestr) - key1 = name + ' 1' - key = name + ' ' + `size` - # NB key may differ from fontkey! - if self.fontcache.has_key(key): - handle = self.fontcache[key] - else: - if self.fontcache.has_key(key1): - handle = self.fontcache[key1] - else: - import fm - handle = fm.findfont(name) - self.fontcache[key1] = handle - handle = handle.scalefont(size) - self.fontcache[fontkey] = \ - self.fontcache[key] = handle - self.fontkey = fontkey - if self.fonthandle <> handle: - self.fonthandle = handle - self.fontinfo = handle.getfontinfo() - handle.setfont() - - -class GLMeasurer(GLFontCache): - # - def textwidth(self, text): - return self.fonthandle.getstrwidth(text) - # - def baseline(self): - return self.fontinfo[6] - self.fontinfo[3] - # - def lineheight(self): - return self.fontinfo[6] - - -class GLWriter(GLFontCache): - # - # NOTES: - # (1) Use gl.ortho2 to use X pixel coordinates! - # - def text(self, (h, v), text): - import gl, fm - gl.cmov2i(h, v + self.fontinfo[6] - self.fontinfo[3]) - fm.prstr(text) - # - def setfont(self, fontkey): - oldhandle = self.fonthandle - GLFontCache.setfont(fontkey) - if self.fonthandle <> oldhandle: - handle.setfont() - - -class GLMeasurerWriter(GLMeasurer, GLWriter): - pass - - -class GLBackEnd(SavingBackEnd): - # - def __init__(self, wid): - import gl - gl.winset(wid) - self.wid = wid - self.width = gl.getsize()[1] - self.height = 0 - self.d = GLMeasurerWriter() - SavingBackEnd.__init__(self) - # - def finish(self): - pass - # - def addpara(self, p): - self.paralist.append(p) - self.height = p.render(self.d, 0, self.height, self.width) - # - def redraw(self): - import gl - gl.winset(self.wid) - width = gl.getsize()[1] - if width <> self.width: - setdocsize = 1 - self.width = width - for p in self.paralist: - p.top = p.bottom = None - d = self.d - v = 0 - for p in self.paralist: - v = p.render(d, 0, v, width) |