Fix line wrapping with justified content and unicode fonts - close #118

Author: Lucas-C

CHANGELOG.md

@@ -10,6 +10,8 @@ and [PEP 440](https://www.python.org/dev/peps/pep-0440/).
 ## [2.3.2] - not released yet
 ### Added
 - `FPDF.set_xmp_metadata`
+### Fixed
+- line wrapping with justified content and unicode fonts, _cf._ [#118](https://github.com/PyFPDF/fpdf2/issues/118)
 
 ## [2.3.1] - 2021-02-28
 ### Added

fpdf/fpdf.py

@@ -760,7 +760,7 @@ def add_font(self, family, style="", fname=None, uni=False):
 
         # Check if font already added or one of the core fonts
         if fontkey in self.fonts or fontkey in self.core_fonts:
-            warnings.warn("Core font or font already added: doing nothing")
+            warnings.warn(f"Core font or font already added '{fontkey}': doing nothing")
             return
         if uni:
             for parent in (".", FPDF_FONT_DIR, SYSTEM_TTFONTS):
@@ -1082,6 +1082,11 @@ def rotation(self, angle, x=None, y=None):
         The rotation affects all elements which are printed inside the indented context
         (with the exception of clickable areas).
 
+        Args:
+            angle (float): angle in degrees
+            x (float): abscissa of the center of the rotation
+            y (float): ordinate of the center of the rotation
+
         Notes
         -----
 
@@ -1214,18 +1219,15 @@ def cell(self, w, h=0, txt="", border=0, ln=0, align="", fill=False, link=""):
                 s += (
                     f"BT 0 Tw {(self.x + dx) * k:.2F} "
                     f"{(self.h - self.y - 0.5 * h - 0.3 * self.font_size) * k:.2F} "
-                    f"Td ["
+                    "Td ["
                 )
 
-                t = txt.split(" ")
-                numt = len(t)
-                for i in range(numt):
-                    tx = t[i]
-                    tx = enclose_in_parens(
-                        escape_parens(tx.encode("UTF-16BE").decode("latin-1"))
-                    )
-                    s += f"{tx} "
-                    if (i + 1) < numt:
+                words = txt.split(" ")
+                for i, word in enumerate(words):
+                    word = escape_parens(word.encode("UTF-16BE").decode("latin-1"))
+                    s += f"({word}) "
+                    is_last_word = (i + 1) == len(words)
+                    if not is_last_word:
                         adj = -(self.ws * self.k) * 1000 / self.font_size_pt
                         s += f"{adj}({space}) "
                 s += "] TJ"
@@ -1237,7 +1239,6 @@ def cell(self, w, h=0, txt="", border=0, ln=0, align="", fill=False, link=""):
                         self.current_font["subset"].append(ord(char))
                 else:
                     txt2 = escape_parens(txt)
-
                 s += (
                     f"BT {(self.x + dx) * k:.2f} "
                     f"{(self.h - self.y - 0.5 * h - 0.3 * self.font_size) * k:.2f} "
@@ -1326,8 +1327,8 @@ def multi_cell(
                 (in any order):
                 `L`: left ; `T`: top ; `R`: right ; `B`: bottom. Default value: 0.
             align (str): Allows to center or align the text. Possible values are:
-                `L` or empty string: left align (default value) ; `C`: center ;
-                `R`: right align
+                `J`: justify (default value); `L` or empty string: left align ;
+                `C`: center ; `R`: right align
             fill (bool): Indicates if the cell background must be painted (`True`)
                 or transparent (`False`). Default value: False.
             split_only (bool): if `True`, does not output anything, only perform

test/cells/test_multi_cell.py

@@ -137,6 +137,20 @@ def test_multi_cell_table_unbreakable(tmp_path):  # issue 111
     assert_pdf_equal(pdf, HERE / "multi_cell_table_unbreakable.pdf", tmp_path)
 
 
+def test_multi_cell_justified_with_unicode_font(tmp_path):  # issue 118
+    pdf = fpdf.FPDF()
+    pdf.add_page()
+    pdf.add_font(
+        "DejaVu", "", HERE / "../end_to_end_legacy/charmap/DejaVuSans.ttf", uni=True
+    )
+    pdf.set_font("DejaVu", "", 14)
+    text = 'Justified line containing "()" that is long enough to trigger wrapping and a line jump'
+    pdf.multi_cell(w=0, h=8, txt=text, ln=1)
+    assert_pdf_equal(
+        pdf, HERE / "test_multi_cell_justified_with_unicode_font.pdf", tmp_path
+    )
+
+
 ## Code used to create test
 # doc = fpdf.FPDF(format = 'letter', unit = 'pt')
 # set_doc_date_0(doc)