mir/libreoffice
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

starmath: these functions are local

Browse Source 
Change-Id: I7b1c9722e300585603ce54610d7ef20425a4e634
Reviewed-on: https://gerrit.libreoffice.org/33797
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Takeshi Abe <tabe@fixedpoint.jp>
This commit is contained in:
Takeshi Abe
2017-02-01 22:48:04 +09:00
parent af42aab836
commit d7736283aa
2 changed files with 80 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
starmath/inc/rect.hxx
View File

@@ -29,12 +29,6 @@
#include "format.hxx"
bool SmGetGlyphBoundRect(const OutputDevice &rDev,
const OUString &rText, Rectangle &rRect);
bool SmIsMathAlpha(const OUString &rText);
inline long SmFromTo(long nFrom, long nTo, double fRelDist)
{
return nFrom + static_cast<long>(fRelDist * (nTo - nFrom));

161
starmath/source/rect.cxx
View File

@@ -31,6 +31,85 @@
#include <cassert>
#include <unordered_set>
namespace {
bool SmGetGlyphBoundRect(const vcl::RenderContext &rDev,
const OUString &rText, Rectangle &rRect)
// basically the same as 'GetTextBoundRect' (in class 'OutputDevice')
// but with a string as argument.
{
// handle special case first
if (rText.isEmpty())
{
rRect.SetEmpty();
return true;
}
// get a device where 'OutputDevice::GetTextBoundRect' will be successful
OutputDevice *pGlyphDev;
if (rDev.GetOutDevType() != OUTDEV_PRINTER)
pGlyphDev = const_cast<OutputDevice *>(&rDev);
else
{
// since we format for the printer (where GetTextBoundRect will fail)
// we need a virtual device here.
pGlyphDev = &SM_MOD()->GetDefaultVirtualDev();
}
const FontMetric aDevFM (rDev.GetFontMetric());
pGlyphDev->Push(PushFlags::FONT | PushFlags::MAPMODE);
vcl::Font aFnt(rDev.GetFont());
aFnt.SetAlignment(ALIGN_TOP);
// use scale factor when calling GetTextBoundRect to counter
// negative effects from antialiasing which may otherwise result
// in significant incorrect bounding rectangles for some characters.
Size aFntSize = aFnt.GetFontSize();
// Workaround to avoid HUGE font sizes and resulting problems
long nScaleFactor = 1;
while( aFntSize.Height() > 2000 * nScaleFactor )
nScaleFactor *= 2;
aFnt.SetFontSize( Size( aFntSize.Width() / nScaleFactor, aFntSize.Height() / nScaleFactor ) );
pGlyphDev->SetFont(aFnt);
long nTextWidth = rDev.GetTextWidth(rText);
Point aPoint;
Rectangle aResult (aPoint, Size(nTextWidth, rDev.GetTextHeight())),
aTmp;
bool bSuccess = pGlyphDev->GetTextBoundRect(aTmp, rText);
OSL_ENSURE( bSuccess, "GetTextBoundRect failed" );
if (!aTmp.IsEmpty())
{
aResult = Rectangle(aTmp.Left() * nScaleFactor, aTmp.Top() * nScaleFactor,
aTmp.Right() * nScaleFactor, aTmp.Bottom() * nScaleFactor);
if (&rDev != pGlyphDev) /* only when rDev is a printer... */
{
long nGDTextWidth = pGlyphDev->GetTextWidth(rText);
if (nGDTextWidth != 0 &&
nTextWidth != nGDTextWidth)
{
aResult.Right() *= nTextWidth;
aResult.Right() /= nGDTextWidth * nScaleFactor;
}
}
}
// move rectangle to match possibly different baselines
// (because of different devices)
long nDelta = aDevFM.GetAscent() - pGlyphDev->GetFontMetric().GetAscent() * nScaleFactor;
aResult.Move(0, nDelta);
pGlyphDev->Pop();
rRect = aResult;
return bSuccess;
}
bool SmIsMathAlpha(const OUString &rText)
// true iff symbol (from StarMath Font) should be treated as letter
@@ -62,8 +141,7 @@ bool SmIsMathAlpha(const OUString &rText)
return aMathAlpha.find(cChar) != aMathAlpha.end();
}
// SmRect members
}
SmRect::SmRect()
@@ -542,83 +620,4 @@ SmRect SmRect::AsGlyphRect() const
return aRect;
}
bool SmGetGlyphBoundRect(const vcl::RenderContext &rDev,
const OUString &rText, Rectangle &rRect)
// basically the same as 'GetTextBoundRect' (in class 'OutputDevice')
// but with a string as argument.
{
// handle special case first
if (rText.isEmpty())
{
rRect.SetEmpty();
return true;
}
// get a device where 'OutputDevice::GetTextBoundRect' will be successful
OutputDevice *pGlyphDev;
if (rDev.GetOutDevType() != OUTDEV_PRINTER)
pGlyphDev = const_cast<OutputDevice *>(&rDev);
else
{
// since we format for the printer (where GetTextBoundRect will fail)
// we need a virtual device here.
pGlyphDev = &SM_MOD()->GetDefaultVirtualDev();
}
const FontMetric aDevFM (rDev.GetFontMetric());
pGlyphDev->Push(PushFlags::FONT | PushFlags::MAPMODE);
vcl::Font aFnt(rDev.GetFont());
aFnt.SetAlignment(ALIGN_TOP);
// use scale factor when calling GetTextBoundRect to counter
// negative effects from antialiasing which may otherwise result
// in significant incorrect bounding rectangles for some characters.
Size aFntSize = aFnt.GetFontSize();
// Workaround to avoid HUGE font sizes and resulting problems
long nScaleFactor = 1;
while( aFntSize.Height() > 2000 * nScaleFactor )
nScaleFactor *= 2;
aFnt.SetFontSize( Size( aFntSize.Width() / nScaleFactor, aFntSize.Height() / nScaleFactor ) );
pGlyphDev->SetFont(aFnt);
long nTextWidth = rDev.GetTextWidth(rText);
Point aPoint;
Rectangle aResult (aPoint, Size(nTextWidth, rDev.GetTextHeight())),
aTmp;
bool bSuccess = pGlyphDev->GetTextBoundRect(aTmp, rText);
OSL_ENSURE( bSuccess, "GetTextBoundRect failed" );
if (!aTmp.IsEmpty())
{
aResult = Rectangle(aTmp.Left() * nScaleFactor, aTmp.Top() * nScaleFactor,
aTmp.Right() * nScaleFactor, aTmp.Bottom() * nScaleFactor);
if (&rDev != pGlyphDev) /* only when rDev is a printer... */
{
long nGDTextWidth = pGlyphDev->GetTextWidth(rText);
if (nGDTextWidth != 0 &&
nTextWidth != nGDTextWidth)
{
aResult.Right() *= nTextWidth;
aResult.Right() /= nGDTextWidth * nScaleFactor;
}
}
}
// move rectangle to match possibly different baselines
// (because of different devices)
long nDelta = aDevFM.GetAscent() - pGlyphDev->GetFontMetric().GetAscent() * nScaleFactor;
aResult.Move(0, nDelta);
pGlyphDev->Pop();
rRect = aResult;
return bSuccess;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */