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PDF editor: New text element implementation (#4246)
* draft * almost working * Widgth adjustment * Fix crash on empty text * Change default layouts * Fix editor bugs * Update src/pretix/control/templates/pretixcontrol/pdf/index.html Co-authored-by: Richard Schreiber <schreiber@rami.io> * Show deprecated text on old text * lockScalingFlip * Regroup editor controls * Update src/pretix/static/pretixcontrol/js/ui/main.js Co-authored-by: Richard Schreiber <schreiber@rami.io> * Update src/pretix/static/pretixcontrol/js/ui/main.js Co-authored-by: Richard Schreiber <schreiber@rami.io> * Update src/pretix/static/pretixcontrol/js/ui/main.js Co-authored-by: Richard Schreiber <schreiber@rami.io> * Update src/pretix/static/pretixcontrol/js/ui/editor.js Co-authored-by: Richard Schreiber <schreiber@rami.io> * Increase default height even further * Add a small version warning * Update src/pretix/control/templates/pretixcontrol/pdf/index.html Co-authored-by: Richard Schreiber <schreiber@rami.io> * Update src/pretix/control/templates/pretixcontrol/pdf/index.html Co-authored-by: Richard Schreiber <schreiber@rami.io> --------- Co-authored-by: Richard Schreiber <schreiber@rami.io>
This commit is contained in:
Raphael Michel
@@ -956,7 +956,7 @@ class Renderer:
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)
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canvas.restoreState()
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def _draw_textarea(self, canvas: Canvas, op: OrderPosition, order: Order, o: dict):
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def _text_paragraph(self, op: OrderPosition, order: Order, o: dict, legacy_lineheight=False, override_fontsize=None):
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font = o['fontfamily']
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# Since pdfmetrics.registerFont is global, we want to make sure that no one tries to sneak in a font, they
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@@ -970,12 +970,13 @@ class Renderer:
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if o['italic']:
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font += ' I'
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fontsize = override_fontsize if override_fontsize is not None else float(o['fontsize'])
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try:
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ad = getAscentDescent(font, float(o['fontsize']))
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ad = getAscentDescent(font, fontsize)
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except KeyError: # font not known, fall back
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logger.warning(f'Use of unknown font "{font}"')
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font = 'Open Sans'
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ad = getAscentDescent(font, float(o['fontsize']))
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ad = getAscentDescent(font, fontsize)
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align_map = {
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'left': TA_LEFT,
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@@ -985,16 +986,17 @@ class Renderer:
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# lineheight display differs from browser canvas. This calc is just empirical values to get
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# reportlab render similarly to browser canvas.
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# for backwards compatability use „uncorrected“ lineheight of 1.0 instead of 1.15
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lineheight = float(o['lineheight']) * 1.15 if 'lineheight' in o else 1.0
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lineheight = float(o['lineheight']) * 1.15 if not legacy_lineheight or 'lineheight' in o else 1.0
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style = ParagraphStyle(
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name=uuid.uuid4().hex,
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fontName=font,
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fontSize=float(o['fontsize']),
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leading=lineheight * float(o['fontsize']),
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fontSize=fontsize,
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leading=lineheight * fontsize,
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# for backwards compatability use autoLeading if no lineheight is given
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autoLeading='off' if 'lineheight' in o else 'max',
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autoLeading='off' if not legacy_lineheight or 'lineheight' in o else 'max',
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textColor=Color(o['color'][0] / 255, o['color'][1] / 255, o['color'][2] / 255),
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alignment=align_map[o['align']]
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alignment=align_map[o['align']],
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splitLongWords=o.get('splitlongwords', True),
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)
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# add an almost-invisible space   after hyphens as word-wrap in ReportLab only works on space chars
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text = conditional_escape(
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@@ -1013,6 +1015,41 @@ class Renderer:
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logger.exception('Reshaping/Bidi fixes failed on string {}'.format(repr(text)))
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p = Paragraph(text, style=style)
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return p, ad, lineheight
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def _draw_textcontainer(self, canvas: Canvas, op: OrderPosition, order: Order, o: dict):
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fontsize = float(o['fontsize'])
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height = float(o['height']) * mm
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width = float(o['width']) * mm
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while True:
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p, ad, lineheight = self._text_paragraph(op, order, o, override_fontsize=fontsize)
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w, h = p.wrapOn(canvas, width, 1000 * mm)
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widths = p.getActualLineWidths0()
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if not widths:
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break
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actual_w = max(widths)
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if not o.get('autoresize', False) or (h <= height and actual_w <= width) or fontsize <= 1.0:
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break
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if h > height: # we can do larger steps for height
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fontsize -= max(1.0, fontsize * .1)
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else:
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fontsize -= max(.25, fontsize * .025)
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canvas.saveState()
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# The ascent/descent offsets here are not really proven to be correct, they're just empirical values to get
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# reportlab render similarly to browser canvas.
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canvas.translate(float(o['left']) * mm, float(o['bottom']) * mm + height)
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canvas.rotate(o.get('rotation', 0) * -1)
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if o.get('verticalalign', 'top') == 'top':
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p.drawOn(canvas, 0, - h)
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elif o.get('verticalalign', 'top') == 'middle':
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p.drawOn(canvas, 0, (-height - h) / 2)
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elif o.get('verticalalign', 'top') == 'bottom':
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p.drawOn(canvas, 0, -height)
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canvas.restoreState()
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def _draw_textarea(self, canvas: Canvas, op: OrderPosition, order: Order, o: dict):
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p, ad, lineheight = self._text_paragraph(op, order, o, legacy_lineheight=True)
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w, h = p.wrapOn(canvas, float(o['width']) * mm, 1000 * mm)
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# p_size = p.wrap(float(o['width']) * mm, 1000 * mm)
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canvas.saveState()
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@@ -1051,6 +1088,8 @@ class Renderer:
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self._draw_barcodearea(canvas, op, order, o)
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elif o['type'] == "imagearea":
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self._draw_imagearea(canvas, op, order, o)
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elif o['type'] == "textcontainer":
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self._draw_textcontainer(canvas, op, order, o)
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elif o['type'] == "textarea":
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self._draw_textarea(canvas, op, order, o)
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elif o['type'] == "poweredby":
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