Fan Zhen Coder & Teacher

iOS 长微博生成脚本

2015-01-27

长微博脚本

经常需要将文本转化成图片,找了些app,要么不太方便,要么带有广告。于是,就参考了一些python脚本,并把标准库的textwrap加入,脚本text2photo.py如下:

	    # -*- coding: utf-8 -*-
    import Image, ImageFont, ImageDraw
    import clipboard, photos
    
    
    
    
    
    
    # Copyright (C) 1999-2001 Gregory P. Ward.
    # Copyright (C) 2002, 2003 Python Software Foundation.
    # Written by Greg Ward <gward@python.net>
    
    
    
    import string, re
    
    
    try:
        _unicode = unicode
    except NameError:
        # If Python is built without Unicode support, the unicode type
        # will not exist. Fake one.
        class _unicode(object):
            pass
    
    
    # Do the right thing with boolean values for all known Python versions
    # (so this module can be copied to projects that don't depend on Python
    # 2.3, e.g. Optik and Docutils) by uncommenting the block of code below.
    #try:
    #    True, False
    #except NameError:
    #    (True, False) = (1, 0)
    
    __all__ = ['TextWrapper', 'wrap', 'fill', 'dedent']
    
    # Hardcode the recognized whitespace characters to the US-ASCII
    # whitespace characters.  The main reason for doing this is that in
    # ISO-8859-1, 0xa0 is non-breaking whitespace, so in certain locales
    # that character winds up in string.whitespace.  Respecting
    # string.whitespace in those cases would 1) make textwrap treat 0xa0 the
    # same as any other whitespace char, which is clearly wrong (it's a
    # *non-breaking* space), 2) possibly cause problems with Unicode,
    # since 0xa0 is not in range(128).
    _whitespace = '\t\n\x0b\x0c\r '
    
    class TextWrapper:
        """
        Object for wrapping/filling text.  The public interface consists of
        the wrap() and fill() methods; the other methods are just there for
        subclasses to override in order to tweak the default behaviour.
        If you want to completely replace the main wrapping algorithm,
        you'll probably have to override _wrap_chunks().
    
        Several instance attributes control various aspects of wrapping:
          width (default: 70)
            the maximum width of wrapped lines (unless break_long_words
            is false)
          initial_indent (default: "")
            string that will be prepended to the first line of wrapped
            output.  Counts towards the line's width.
          subsequent_indent (default: "")
            string that will be prepended to all lines save the first
            of wrapped output; also counts towards each line's width.
          expand_tabs (default: true)
            Expand tabs in input text to spaces before further processing.
            Each tab will become 1 .. 8 spaces, depending on its position in
            its line.  If false, each tab is treated as a single character.
          replace_whitespace (default: true)
            Replace all whitespace characters in the input text by spaces
            after tab expansion.  Note that if expand_tabs is false and
            replace_whitespace is true, every tab will be converted to a
            single space!
          fix_sentence_endings (default: false)
            Ensure that sentence-ending punctuation is always followed
            by two spaces.  Off by default because the algorithm is
            (unavoidably) imperfect.
          break_long_words (default: true)
            Break words longer than 'width'.  If false, those words will not
            be broken, and some lines might be longer than 'width'.
          break_on_hyphens (default: true)
            Allow breaking hyphenated words. If true, wrapping will occur
            preferably on whitespaces and right after hyphens part of
            compound words.
          drop_whitespace (default: true)
            Drop leading and trailing whitespace from lines.
        """
    
        whitespace_trans = string.maketrans(_whitespace, ' ' * len(_whitespace))
    
        unicode_whitespace_trans = {}
        uspace = ord(u' ')
        for x in map(ord, _whitespace):
            unicode_whitespace_trans[x] = uspace
    
        # This funky little regex is just the trick for splitting
        # text up into word-wrappable chunks.  E.g.
        #   "Hello there -- you goof-ball, use the -b option!"
        # splits into
        #   Hello/ /there/ /--/ /you/ /goof-/ball,/ /use/ /the/ /-b/ /option!
        # (after stripping out empty strings).
        wordsep_re = re.compile(
            r'(\s+|'                                  # any whitespace
            r'[^\s\w]*\w+[^0-9\W]-(?=\w+[^0-9\W])|'   # hyphenated words
            r'(?<=[\w\!\"\'\&\.\,\?])-{2,}(?=\w))')   # em-dash
    
        # This less funky little regex just split on recognized spaces. E.g.
        #   "Hello there -- you goof-ball, use the -b option!"
        # splits into
        #   Hello/ /there/ /--/ /you/ /goof-ball,/ /use/ /the/ /-b/ /option!/
        wordsep_simple_re = re.compile(r'(\s+)')
    
        # XXX this is not locale- or charset-aware -- string.lowercase
        # is US-ASCII only (and therefore English-only)
        sentence_end_re = re.compile(r'[%s]'              # lowercase letter
                                     r'[\.\!\?]'          # sentence-ending punct.
                                     r'[\"\']?'           # optional end-of-quote
                                     r'\Z'                # end of chunk
                                     % string.lowercase)
    
    
        def __init__(self,
                     width=70,
                     initial_indent="",
                     subsequent_indent="",
                     expand_tabs=True,
                     replace_whitespace=True,
                     fix_sentence_endings=False,
                     break_long_words=True,
                     drop_whitespace=True,
                     break_on_hyphens=True):
            self.width = width
            self.initial_indent = initial_indent
            self.subsequent_indent = subsequent_indent
            self.expand_tabs = expand_tabs
            self.replace_whitespace = replace_whitespace
            self.fix_sentence_endings = fix_sentence_endings
            self.break_long_words = break_long_words
            self.drop_whitespace = drop_whitespace
            self.break_on_hyphens = break_on_hyphens
    
            # recompile the regexes for Unicode mode -- done in this clumsy way for
            # backwards compatibility because it's rather common to monkey-patch
            # the TextWrapper class' wordsep_re attribute.
            self.wordsep_re_uni = re.compile(self.wordsep_re.pattern, re.U)
            self.wordsep_simple_re_uni = re.compile(
                self.wordsep_simple_re.pattern, re.U)
    
    
        # -- Private methods -----------------------------------------------
        # (possibly useful for subclasses to override)
    
        def _munge_whitespace(self, text):
            """_munge_whitespace(text : string) -> string
    
            Munge whitespace in text: expand tabs and convert all other
            whitespace characters to spaces.  Eg. " foo\tbar\n\nbaz"
            becomes " foo    bar  baz".
            """
            if self.expand_tabs:
                text = text.expandtabs()
            if self.replace_whitespace:
                if isinstance(text, str):
                    text = text.translate(self.whitespace_trans)
                elif isinstance(text, _unicode):
                    text = text.translate(self.unicode_whitespace_trans)
            return text
    
    
        def _split(self, text):
            """_split(text : string) -> [string]
    
            Split the text to wrap into indivisible chunks.  Chunks are
            not quite the same as words; see _wrap_chunks() for full
            details.  As an example, the text
              Look, goof-ball -- use the -b option!
            breaks into the following chunks:
              'Look,', ' ', 'goof-', 'ball', ' ', '--', ' ',
              'use', ' ', 'the', ' ', '-b', ' ', 'option!'
            if break_on_hyphens is True, or in:
              'Look,', ' ', 'goof-ball', ' ', '--', ' ',
              'use', ' ', 'the', ' ', '-b', ' ', option!'
            otherwise.
            """
            if isinstance(text, _unicode):
                if self.break_on_hyphens:
                    pat = self.wordsep_re_uni
                else:
                    pat = self.wordsep_simple_re_uni
            else:
                if self.break_on_hyphens:
                    pat = self.wordsep_re
                else:
                    pat = self.wordsep_simple_re
            chunks = pat.split(text)
            chunks = filter(None, chunks)  # remove empty chunks
            return chunks
    
        def _fix_sentence_endings(self, chunks):
            """_fix_sentence_endings(chunks : [string])
    
            Correct for sentence endings buried in 'chunks'.  Eg. when the
            original text contains "... foo.\nBar ...", munge_whitespace()
            and split() will convert that to [..., "foo.", " ", "Bar", ...]
            which has one too few spaces; this method simply changes the one
            space to two.
            """
            i = 0
            patsearch = self.sentence_end_re.search
            while i < len(chunks)-1:
                if chunks[i+1] == " " and patsearch(chunks[i]):
                    chunks[i+1] = "  "
                    i += 2
                else:
                    i += 1
    
        def _handle_long_word(self, reversed_chunks, cur_line, cur_len, width):
            """_handle_long_word(chunks : [string],
                                 cur_line : [string],
                                 cur_len : int, width : int)
    
            Handle a chunk of text (most likely a word, not whitespace) that
            is too long to fit in any line.
            """
            # Figure out when indent is larger than the specified width, and make
            # sure at least one character is stripped off on every pass
            if width < 1:
                space_left = 1
            else:
                space_left = width - cur_len
    
            # If we're allowed to break long words, then do so: put as much
            # of the next chunk onto the current line as will fit.
            if self.break_long_words:
                cur_line.append(reversed_chunks[-1][:space_left])
                reversed_chunks[-1] = reversed_chunks[-1][space_left:]
    
            # Otherwise, we have to preserve the long word intact.  Only add
            # it to the current line if there's nothing already there --
            # that minimizes how much we violate the width constraint.
            elif not cur_line:
                cur_line.append(reversed_chunks.pop())
    
            # If we're not allowed to break long words, and there's already
            # text on the current line, do nothing.  Next time through the
            # main loop of _wrap_chunks(), we'll wind up here again, but
            # cur_len will be zero, so the next line will be entirely
            # devoted to the long word that we can't handle right now.
    
        def _wrap_chunks(self, chunks):
            """_wrap_chunks(chunks : [string]) -> [string]
    
            Wrap a sequence of text chunks and return a list of lines of
            length 'self.width' or less.  (If 'break_long_words' is false,
            some lines may be longer than this.)  Chunks correspond roughly
            to words and the whitespace between them: each chunk is
            indivisible (modulo 'break_long_words'), but a line break can
            come between any two chunks.  Chunks should not have internal
            whitespace; ie. a chunk is either all whitespace or a "word".
            Whitespace chunks will be removed from the beginning and end of
            lines, but apart from that whitespace is preserved.
            """
            lines = []
            if self.width <= 0:
                raise ValueError("invalid width %r (must be > 0)" % self.width)
    
            # Arrange in reverse order so items can be efficiently popped
            # from a stack of chucks.
            chunks.reverse()
    
            while chunks:
    
                # Start the list of chunks that will make up the current line.
                # cur_len is just the length of all the chunks in cur_line.
                cur_line = []
                cur_len = 0
    
                # Figure out which static string will prefix this line.
                if lines:
                    indent = self.subsequent_indent
                else:
                    indent = self.initial_indent
    
                # Maximum width for this line.
                width = self.width - len(indent)
    
                # First chunk on line is whitespace -- drop it, unless this
                # is the very beginning of the text (ie. no lines started yet).
                if self.drop_whitespace and chunks[-1].strip() == '' and lines:
                    del chunks[-1]
    
                while chunks:
                    l = len(chunks[-1])
    
                    # Can at least squeeze this chunk onto the current line.
                    if cur_len + l <= width:
                        cur_line.append(chunks.pop())
                        cur_len += l
    
                    # Nope, this line is full.
                    else:
                        break
    
                # The current line is full, and the next chunk is too big to
                # fit on *any* line (not just this one).
                if chunks and len(chunks[-1]) > width:
                    self._handle_long_word(chunks, cur_line, cur_len, width)
    
                # If the last chunk on this line is all whitespace, drop it.
                if self.drop_whitespace and cur_line and cur_line[-1].strip() == '':
                    del cur_line[-1]
    
                # Convert current line back to a string and store it in list
                # of all lines (return value).
                if cur_line:
                    lines.append(indent + ''.join(cur_line))
    
            return lines
    
    
        # -- Public interface ----------------------------------------------
    
        def wrap(self, text):
            """wrap(text : string) -> [string]
    
            Reformat the single paragraph in 'text' so it fits in lines of
            no more than 'self.width' columns, and return a list of wrapped
            lines.  Tabs in 'text' are expanded with string.expandtabs(),
            and all other whitespace characters (including newline) are
            converted to space.
            """
            text = self._munge_whitespace(text)
            chunks = self._split(text)
            if self.fix_sentence_endings:
                self._fix_sentence_endings(chunks)
            return self._wrap_chunks(chunks)
    
        def fill(self, text):
            """fill(text : string) -> string
    
            Reformat the single paragraph in 'text' to fit in lines of no
            more than 'self.width' columns, and return a new string
            containing the entire wrapped paragraph.
            """
            return "\n".join(self.wrap(text))
    
    
    # -- Convenience interface ---------------------------------------------
    
    def wrap(text, width=70, **kwargs):
        """Wrap a single paragraph of text, returning a list of wrapped lines.
    
        Reformat the single paragraph in 'text' so it fits in lines of no
        more than 'width' columns, and return a list of wrapped lines.  By
        default, tabs in 'text' are expanded with string.expandtabs(), and
        all other whitespace characters (including newline) are converted to
        space.  See TextWrapper class for available keyword args to customize
        wrapping behaviour.
        """
        w = TextWrapper(width=width, **kwargs)
        return w.wrap(text)
    
    def fill(text, width=70, **kwargs):
        """Fill a single paragraph of text, returning a new string.
    
        Reformat the single paragraph in 'text' to fit in lines of no more
        than 'width' columns, and return a new string containing the entire
        wrapped paragraph.  As with wrap(), tabs are expanded and other
        whitespace characters converted to space.  See TextWrapper class for
        available keyword args to customize wrapping behaviour.
        """
        w = TextWrapper(width=width, **kwargs)
        return w.fill(text)
    
    
    # -- Loosely related functionality -------------------------------------
    
    _whitespace_only_re = re.compile('^[ \t]+$', re.MULTILINE)
    _leading_whitespace_re = re.compile('(^[ \t]*)(?:[^ \t\n])', re.MULTILINE)
    
    def dedent(text):
        """Remove any common leading whitespace from every line in `text`.
    
        This can be used to make triple-quoted strings line up with the left
        edge of the display, while still presenting them in the source code
        in indented form.
    
        Note that tabs and spaces are both treated as whitespace, but they
        are not equal: the lines "  hello" and "\thello" are
        considered to have no common leading whitespace.  (This behaviour is
        new in Python 2.5; older versions of this module incorrectly
        expanded tabs before searching for common leading whitespace.)
        """
        # Look for the longest leading string of spaces and tabs common to
        # all lines.
        margin = None
        text = _whitespace_only_re.sub('', text)
        indents = _leading_whitespace_re.findall(text)
        for indent in indents:
            if margin is None:
                margin = indent
    
            # Current line more deeply indented than previous winner:
            # no change (previous winner is still on top).
            elif indent.startswith(margin):
                pass
    
            # Current line consistent with and no deeper than previous winner:
            # it's the new winner.
            elif margin.startswith(indent):
                margin = indent
    
            # Current line and previous winner have no common whitespace:
            # there is no margin.
            else:
                margin = ""
                break
    
        # sanity check (testing/debugging only)
        if 0 and margin:
            for line in text.split("\n"):
                assert not line or line.startswith(margin), \
                       "line = %r, margin = %r" % (line, margin)
    
        if margin:
            text = re.sub(r'(?m)^' + margin, '', text)
        return text
    
    
    """Wrap textwrap.TextWrapper to properly handle multiple paragraphs"""
    def docwrap(text, width=70):
            """Override textwrap.TextWrapper to process 'text' properly when
            multiple paragraphs present"""
            para_edge = re.compile(r"(\n\s*\n)", re.MULTILINE)
            paragraphs = para_edge.split(text)
            wrapped_lines = []
            for para in paragraphs:
                if para.isspace():
           	      #    if not replace_whitespace:
                        # Do not take the leading and trailing newlines since
                        # joining the list with newlines (as self.fill will do)
                        # will put them back in.
                  #     if expand_tabs:
                    #       para = para.expandtabs() 
                    #   wrapped_lines.append(para[1:-1])
                  #  else:  
                        # self.fill will end up putting in the needed newline to
                        # space out the paragraphs   """
                    wrapped_lines.append('')
                else: 
                    wrapped_lines.extend(wrap(para, width))
            return wrapped_lines
    
    
     
    text = clipboard.get()
    
    
    # lines = docwrap(text.strip(), 20)
    lines = docwrap(text, 20)
    
    
    font = ImageFont.truetype("STHeitiSC-Medium",14) #'STHeiti-Medium.ttc', 14)
    
    y_text = 5
    for line in lines:
        width, height = font.getsize(line)
        y_text += height
    
    
    im = Image.new("RGB", (20*14+20, y_text + height+2), (255, 255, 255))
    
    dr = ImageDraw.Draw(im)
    
    y_text = 5
    for line in lines:
        width, height = font.getsize(line)
        dr.text((10, y_text), line, font = font, fill = "#000000")
        y_text += height
     
    photos.save_image(im)

这个脚本自动将剪贴板中的文字转化成照片,保存到相册。

使用方法

需要 iOS pythonista app 支持python代码的运行,可以用 URL scheme 来使用脚本

pythonista://Text2Photo?action=run

Launch Center Pro或者 Drafts都支持URL scheme,也可以越狱后用 activator 定义手势来使用它。 Drafts 中可以这样设置:(先把当前文档拷贝到剪贴板,然后运行脚本)

drafts://x-callback-url/create?text=[[draft]]&action=&afterSuccess=Delete&x-success=

参考链接


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