Word for Mac spaces Symbol lines at 1.222 em (measured at 11 and 20 pt)
even with Apple's Symbol installed, whose own line is one em. Symbol's
metrics now apply when the resolved face is one em tall as well as when
the font is substituted (fonts::word::symbol_line).
The fallback Symbol metrics applied whenever the raw family name wasn't
installed, so Symbol (PCL6) resolved to an installed Symbol still took
them. Use the resolution's substituted state instead.
Word sizes a line by the fonts in it, and a bullet in Symbol (Word's
default, U+F0B7) has a taller ascent than Calibri or Times New Roman.
Without Symbol (Linux, macOS without Office, the web build) WordCraft
draws the bullet from another face and used that face's height, so every
bulleted line was shorter than Word's: 14.5 pt against 15.1 pt in
Calibri 11 pt at 1.08 spacing, 14.9 against 15.7 in Times New Roman 12 pt.
symbol_font_metrics gives Symbol's and Wingdings' ascent and descent as
Word's PDFs state them, and a run in one of them that isn't installed
takes them. The label's ascent now comes from its style, so the existing
rule (the label's extra ascent added unscaled) sees them.
Measured in Word 2016: Calibri 11 / Times 12 bullets 15.08 / 15.72 pt,
WordCraft now 15.07 / 15.75 pt. On 251 real documents against Word PDFs,
page breaks at the same word 45.4% -> 50.1%.
#1613 draws a missing font in Cambria when the font table classes it as
roman, as Word does. Times New Roman is roman in every font table, so
where it isn't installed (Linux, the web build) every Times document came
out in Caladea: lines 2.1 pt taller at 12 pt and different line breaks.
Word always has Times New Roman, so it never applies that rule to it.
The rule now leaves alone a font whose substitutes are chosen by its name
(a metric-compatible clone or the same design under another name: Times,
Arial, Courier New, Palatino, the symbol, Hebrew and Persian fonts).
Fonts with no clone of their own (Cambria, Georgia, brand fonts) still
follow it.
Checked on 251 real documents against PDFs from Word: exact page counts
201 -> 229, page breaks in the same place 45.4% -> 51.9%.
Магда М.Г.