This is a follow-up to 758de957.
- unify the metrics and drawing of \sqrt and \root using helper
functions mathed_root_metrics and mathed_draw_root.
- compute the vertical spacing above the nucleus of the root following
rule 11 of the TeXbook. In particular, it is different in inline and
display style.
- draw the root glyph without hard-coded pixel values. Make the line
width depend on the zoom.
more work is needed to implement properly rule 11:
- Ideally, we should use sqrt glyphs from the math fonts. Note that
then we would get rule thickness from there.
- The positioning of the root MathData is arbitrary. It should
follow the definition of \root...\of... in The Texbook in
Apprendix B page 360.
Fixes bug #10814.
* set up a replacement of *, -, and : by the adequate symbols (#9893)
* fix the wrong character selection and operator spacing in \text mode
* hide some internal symbols from the auto-completion.
This requires to change many docstrings into std::strings. The logic behind that
is that they represent a fixed set of math fonts, and therefore “string” means
here “poor man's enum” rather than text (this is consistent with MetricsBase).
Profiling of scrolling inside a document over macro-instensive areas:
Before the patch:
44,1% BufferView::updateMetrics()
-> 34,8% InsetMathHull::metrics()
-> 9,8% FontSetChanger::FontSetChanger()
28,4% BufferView::draw()
After the patch:
35,3% BufferView::updateMetrics()
-> 27,2% InsetMathHull::metrics
-> 0,4% FontSetChanger::FontSetChanger()
47,5% BufferView::draw()
FontSetChanger::FontSetChanger() is made 41x less expensive (with reference
BV::draw()) just by removing this conversion. The remaining 0,4% could be
squished by replacing the strings with a proper enum, but this is premature. Of
course, this only treats the symptoms: there is no good reason that this
function is called 45500 times over the time of 40 repaints.
This is a first cleanup step. More complex rules have to be
implemented on top of this.
Use proper spacing \thinmuskip, \medmuskip and \thickmuskip instead of
ad-hoc values.
Rename isRelOp to isMathRel and introduce isMathBin and isMathPunct
(for InsetMathChar and InsetMathSymbol). Update the categories of
characters in InsetMathChar according to LaTeX source (fontmath.ltx).
Set correctly the spacing around mathrel, mathbin and mathpunct
elements. Use \thinmuskip around MathDelim instead of a hardcoded 4.
This is related to bug #8883.
The computation of length on screen depend in particular of the computation of the size of an em. Many places of the code used to rely on the width of the M character, which is not really correct:
http://en.wikipedia.org/wiki/Em_%28typography%29
In digital typography, the best value to use is the point size of the font.
* Implement FontMetrics::em(), which returns the value in pixels of the EM unit.
Convert code to use it.
* Introduce Length::inPixel(MetricsBase const &), which takes the textwidth and em information from the MetricsBase object. Convert code to use it.
* Fix several places where Length::inPixel is used without a proper em value.
* add mathed_font_em() helper function. It should eventually be removed like some other functions in MathSupport.
* Add dummy implementation of FontMetrics to tex2lyx for linking purposes.
False positive rate of hints is quite high. Although the includes can be
technically removed (due to other includes) they logically belong to the
header.
The toolbar image is the one Uwe attached to the bug report. Note that
\sideset works only for operators like \sum in the nucleus. LyX allows
any content, so you might get a LaTeX error. I don't know how to prevent
wrong content in the nucleus.
in mathed, so implement a strategy which is immune to color changes.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@34311 a592a061-630c-0410-9148-cb99ea01b6c8
* Font::FontBits -> FontInfo
* Font::FONT_XXX -> all enums transfered to FontEnums.h and renamed to FontXxx
I've replaced Font uses with FontInfo were the language() member was not needed, basically all draw() and metrics methods. There's one problematic cases with InsetQuotes which I solved by taking the Buffer main language.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21240 a592a061-630c-0410-9148-cb99ea01b6c8
* src/mathed/MathSupport.[Ch]
(mathed_char_kerning): New. Compute right kerning for the given
font and character as the difference between right bearing and
logical width.
* src/mathed/InsetMathScript.[Ch]
(InsetMathScript::dx1, InsetMathScript::metrics): Account for
nucleus right kerning.
(InsetMathScript::nker): New. Return the nucleus right kerning
if positive, zero otherwise.
* src/mathed/MathData.[Ch]
(MathArray::metrics): Cache the nucleus right kerning value.
(MathArray::kerning): New. Return cached right kerning.
* src/mathed/InsetMathChar.[Ch]
(InsetMathChar::metrics): Cache the character right kerning.
(InsetMathChar::kerning): New. Return cached right kerning.
* src/mathed/InsetMath.h
(InsetMath::kerning): New virtual method.
* src/mathed/InsetMathSymbol.[Ch]
(InsetMathSymbol::metrics): Cache the symbol right kerning.
(InsetMathSymbol::kerning): New. Return cached right kerning.
* src/mathed/InsetMathFont.[Ch]
(InsetMathFont::kerning): New. Return cached right kerning.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17497 a592a061-630c-0410-9148-cb99ea01b6c8
http://bugzilla.lyx.org/show_bug.cgi?id=2900
The only drawback is that it requires about 20Mo extra-memory when loading the UserGuide. If it turns out to be too much, we can switch to a QHash based solution instead of a table.
* dimension.[Ch]:
- Dimension(LyXFont const, char_typec): new ctor
- set(LyXFont const & font, char_type c): new method.
* frontends/FontMetrics.h:
- width(char_type): is now a pure virtual method.
* GuiFontMetrics:
- CharMetrics: new structure;
- the metrics cache now also cache ascent and descent. This is especially useful for mathed.
* MathSupport.[Ch]:
- mathed_char_dim(): deleted. We now use Dimension::set() directly instead.
* rowpainter.C: fixe empty space.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@16124 a592a061-630c-0410-9148-cb99ea01b6c8
CoordCache & coord_cache = sl.text()->bv()->coordCache();
As you can see, I used this indirection to access the BufferView::CoordCache(). Bad luck, the passed CursorSlice was not completely valid inside a mathed inset, hence the crash. My solution is to pass BufferView to InsetBase::cursorPos() and all its derivative.
* InsetBase::cursorPos(): pass BufferView const &
* bufferview_funcs::coordOffset(): ditto.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15356 a592a061-630c-0410-9148-cb99ea01b6c8
Basically, I replaced all methods in the font_metrics namespace by a proper virtual interface FontMetrics. The FontLoader is _the_ container for FontMetrics.
This patch should also bring some optimizations in a number of place in the code. This is because we do not need any more to search for the LyXFont at each font_metrics call. In effect, the speed advantage is not as sensible and this is a bit deceiving considering that this was my primary motivation behind the patch. But I like the patch anyway as it cleans up the relation and interfacing between fonts, metrics and frontends.
* frontends/FontMetrics.h: new virtual interface. Renamed from font_metrics.h
* qt4/GuiFontMetrics: corresponding qt4 implememtation. Renamed from qfont_metrics.C. The smallCaps particular case treatment has been transfered here as well as the width cache for MacOSX and Windows.
* qt4/QLPainter.C: the smallCapsText has been reworked to return the width of the drawn text.C
all other files: replace font_metric helper function call with corresponding FontMetrics method calls.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15265 a592a061-630c-0410-9148-cb99ea01b6c8
