Add option to add pdf page with option information (#198)

This adds options --info and -info-all:
--info to add a page that has all the options used for the PDF file.
--info-all is the same as --info, but includes pages with all the possible options that can be used.

domdiv/draw.py

@@ -7,8 +7,8 @@ import pkg_resources
 from reportlab.lib.units import cm
 from reportlab.pdfbase import pdfmetrics
 from reportlab.lib.styles import getSampleStyleSheet
-from reportlab.platypus import Paragraph
-from reportlab.lib.enums import TA_JUSTIFY, TA_CENTER
+from reportlab.platypus import Paragraph, XPreformatted
+from reportlab.lib.enums import TA_JUSTIFY, TA_CENTER, TA_LEFT
 from reportlab.pdfgen import canvas
 from reportlab.pdfbase.ttfonts import TTFont
 from reportlab.pdfbase.pdfmetrics import stringWidth
@@ -61,6 +61,100 @@ class DividerDrawer(object):
                                                pkg_resources.resource_filename('domdiv',
                                                                                self.font_mapping[fonttype][0])))
                 self.font_mapping[fonttype] = ftag
+        self.font_mapping['Monospaced'] = 'Courier'
+
+    def drawTextPages(self, pages, margin=1.0, fontsize=10, leading=10, spacer=0.05):
+        s = getSampleStyleSheet()['BodyText']
+        s.fontName = self.font_mapping['Monospaced']
+        s.alignment = TA_LEFT
+
+        textHorizontalMargin = margin * cm
+        textVerticalMargin = margin * cm
+        textBoxWidth = self.options.paperwidth - 2 * textHorizontalMargin
+        textBoxHeight = self.options.paperheight - 2 * textVerticalMargin
+        minSpacerHeight = 0.05 * cm
+
+        for page in pages:
+            s.fontsize = fontsize
+            s.leading = leading
+            spacerHeight = spacer * cm
+            text = re.split("\n", page)
+            while True:
+                paragraphs = []
+                # this accounts for the spacers we insert between paragraphs
+                h = (len(text) - 1) * spacerHeight
+                for line in text:
+                    p = XPreformatted(line, s)
+                    h += p.wrap(textBoxWidth, textBoxHeight)[1]
+                    paragraphs.append(p)
+
+                if h <= textBoxHeight or s.fontSize <= 1 or s.leading <= 1:
+                    break
+                else:
+                    s.fontSize -= 0.2
+                    s.leading -= 0.2
+                    spacerHeight = max(spacerHeight - 1, minSpacerHeight)
+
+            h = self.options.paperheight - textVerticalMargin
+            for p in paragraphs:
+                h -= p.height
+                p.drawOn(self.canvas, textHorizontalMargin, h)
+                h -= spacerHeight
+            self.canvas.showPage()
+
+    def drawInfo(self, printIt=True):
+        # Keep track of the number of pages
+        pageCount = 0
+        # A unique separator that will not be found in any normal text.  Was '@@@***!!!***@@@' at one time.
+        sep = chr(30) + chr(31)
+        # Generic space.  Other options are ' ', '&nbsp;', '&#xa0;'
+        space = '&nbsp;'
+        tab_spaces = 4
+        blank_line = (space + '\n') * 2
+
+        if self.options.info or self.options.info_all:
+            text = "<para alignment='center'><font size=18><b>Sumpfork's Dominion Tabbed Divider Generator</b></font>\n"
+            text += blank_line
+            text += "Online generator at: "
+            text += "<a href='http://domtabs.sandflea.org/' color='blue'>http://domtabs.sandflea.org</a>\n\n"
+            text += "Source code on GitHub at: "
+            text += "<a href='https://github.com/sumpfork/dominiontabs' color='blue'>"
+            text += "https://github.com/sumpfork/dominiontabs</a>\n\n"
+            text += "Options for this file:\n"
+
+            cmd = " ".join(self.options.argv)
+            cmd = cmd.replace(' --', sep + '--')
+            cmd = cmd.replace(' -', sep + '-')
+            cmd = cmd.replace(sep, '\n' + space * tab_spaces)
+
+            text += cmd
+            text += blank_line
+
+            if printIt:
+                self.drawTextPages([text], margin=1.0, fontsize=10, leading=10, spacer=0.05)
+            pageCount += 1
+
+        if self.options.info_all:
+            linesPerPage = 80
+            lines = self.options.help.replace('\n\n', blank_line).replace(' ', space).split('\n')
+            pages = []
+            lineCount = 0
+            text = ""
+            for line in lines:
+                lineCount += 1
+                text += line + '\n'
+                if lineCount >= linesPerPage:
+                    pages.append(text)
+                    pageCount += 1
+                    lineCount = 0
+                    text = ""
+            if text:
+                pages.append(text)
+                pageCount += 1
+            if printIt:
+                self.drawTextPages(pages, margin=0.75, fontsize=6, leading=7, spacer=0.1)
+
+        return pageCount
 
     def wantCentreTab(self, card):
         return (card.isExpansion() and self.options.centre_expansion_dividers) or self.options.tab_side == "centre"
@@ -222,6 +316,8 @@ class DividerDrawer(object):
             options.outfile,
             pagesize=(options.paperwidth, options.paperheight))
         self.drawDividers(cards)
+        if options.info or options.info_all:
+            self.drawInfo()
         self.canvas.save()
 
     def add_inline_images(self, text, fontsize):

domdiv/main.py

@@ -401,6 +401,16 @@ def parse_opts(cmdline_args=None):
         dest="tabs_only",
         help="Draw only the divider tabs and no divider outlines. "
         "Used to print the divider tabs on labels.")
+    group_printing.add_argument(
+        "--info",
+        action="store_true",
+        dest="info",
+        help="Add a page that has all the options used for the file.")
+    group_printing.add_argument(
+        "--info-all",
+        action="store_true",
+        dest="info_all",
+        help="Same as --info, but includes pages with all the possible options that can be used.")
     group_printing.add_argument(
         "--preview",
         action='store_true',
@@ -425,7 +435,11 @@ def parse_opts(cmdline_args=None):
         dest="write_json",
         help="Write json version of card definitions and extras.")
 
-    return parser.parse_args(args=cmdline_args)
+    options = parser.parse_args(args=cmdline_args)
+    # Need to do these while we have access to the parser
+    options.argv = sys.argv if options.info or options.info_all else None
+    options.help = parser.format_help() if options.info_all else None
+    return options
 
 
 def clean_opts(options):