зеркало из https://github.com/mozilla/gecko-dev.git
yet another patch from Owen Taylor <otaylor@redhat.com> that impliments
nsFontMetricsGTK
This commit is contained in:
pavlov%pavlov.net
Родитель
0ae3117b58
Коммит
a8799e5126
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@ -16,10 +16,13 @@
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* Reserved.
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*/
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#include <gdk/gdk.h>
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#include "xp_core.h"
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#include "nsFontMetricsGTK.h"
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#include "nspr.h"
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#include <gdk/gdk.h>
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#include <gdk/gdkx.h>
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static NS_DEFINE_IID(kIFontMetricsIID, NS_IFONT_METRICS_IID);
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@ -27,87 +30,336 @@ static NS_DEFINE_IID(kIFontMetricsIID, NS_IFONT_METRICS_IID);
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nsFontMetricsGTK :: nsFontMetricsGTK()
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{
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NS_INIT_REFCNT();
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mFont = nsnull;
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mFontHandle = nsnull;
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}
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nsFontMetricsGTK :: ~nsFontMetricsGTK()
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{
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if (nsnull != mFont) {
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delete mFont;
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mFont = nsnull;
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}
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if (nsnull != mFontHandle) {
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gdk_font_unref (mFontHandle);
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}
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}
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NS_IMPL_ISUPPORTS(nsFontMetricsGTK, kIFontMetricsIID)
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NS_IMETHODIMP nsFontMetricsGTK::Init(const nsFont& aFont, nsIDeviceContext* aContext)
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{
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NS_ASSERTION(!(nsnull == aContext), "attempt to init fontmetrics with null device context");
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nsAutoString firstFace;
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if (NS_OK != aContext->FirstExistingFont(aFont, firstFace)) {
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aFont.GetFirstFamily(firstFace);
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}
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char **fnames = nsnull;
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PRInt32 namelen = firstFace.Length() + 1;
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char *wildstring = (char *)PR_Malloc((namelen << 1) + 200);
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int numnames = 0;
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char altitalicization = 0;
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XFontStruct *fonts;
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float t2d;
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aContext->GetTwipsToDevUnits(t2d);
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PRInt32 dpi = NSToIntRound(t2d * 1440);
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if (nsnull == wildstring)
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return NS_ERROR_NOT_INITIALIZED;
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mFont = new nsFont(aFont);
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mContext = aContext;
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mFontHandle = nsnull;
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firstFace.ToCString(wildstring, namelen);
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if (abs(dpi - 75) < abs(dpi - 100))
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dpi = 75;
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else
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dpi = 100;
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#ifdef NOISY_FONTS
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fprintf(stderr, "looking for font %s (%d)", wildstring, aFont.size / 20);
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#endif
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//font properties we care about:
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//name
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//weight (bold, medium)
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//slant (r = normal, i = italic, o = oblique)
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//size in nscoords >> 1
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PR_snprintf(&wildstring[namelen + 1], namelen + 200,
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"*-%s-%s-%c-normal--*-*-%d-%d-*-*-*",
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wildstring,
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(aFont.weight <= NS_FONT_WEIGHT_NORMAL) ? "medium" : "bold",
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(aFont.style == NS_FONT_STYLE_NORMAL) ? 'r' :
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((aFont.style == NS_FONT_STYLE_ITALIC) ? 'i' : 'o'), dpi, dpi);
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fnames = ::XListFontsWithInfo(GDK_DISPLAY(), &wildstring[namelen + 1], 200, &numnames, &fonts);
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if (aFont.style == NS_FONT_STYLE_ITALIC)
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altitalicization = 'o';
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else if (aFont.style == NS_FONT_STYLE_OBLIQUE)
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altitalicization = 'i';
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if ((numnames <= 0) && altitalicization)
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{
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PR_snprintf(&wildstring[namelen + 1], namelen + 200,
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"*-%s-%s-%c-normal--*-*-%d-%d-*-*-*",
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wildstring,
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(aFont.weight <= NS_FONT_WEIGHT_NORMAL) ? "medium" : "bold",
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altitalicization, dpi, dpi);
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fnames = ::XListFontsWithInfo(GDK_DISPLAY(), &wildstring[namelen + 1], 200, &numnames, &fonts);
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}
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if (numnames <= 0)
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{
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//we were not able to match the font name at all...
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char *newname = firstFace.ToNewCString();
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PR_snprintf(&wildstring[namelen + 1], namelen + 200,
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"*-%s-%s-%c-normal--*-*-%d-%d-*-*-*",
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newname,
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(aFont.weight <= NS_FONT_WEIGHT_NORMAL) ? "medium" : "bold",
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(aFont.style == NS_FONT_STYLE_NORMAL) ? 'r' :
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((aFont.style == NS_FONT_STYLE_ITALIC) ? 'i' : 'o'), dpi, dpi);
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fnames = ::XListFontsWithInfo(GDK_DISPLAY(), &wildstring[namelen + 1], 200, &numnames, &fonts);
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if ((numnames <= 0) && altitalicization)
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{
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PR_snprintf(&wildstring[namelen + 1], namelen + 200,
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"*-%s-%s-%c-normal--*-*-%d-%d-*-*-*",
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newname,
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(aFont.weight <= NS_FONT_WEIGHT_NORMAL) ? "medium" : "bold",
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altitalicization, dpi, dpi);
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fnames = ::XListFontsWithInfo(GDK_DISPLAY(), &wildstring[namelen + 1], 200, &numnames, &fonts);
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}
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delete [] newname;
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}
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if (numnames > 0)
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{
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char *nametouse = PickAppropriateSize(fnames, fonts, numnames, aFont.size);
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mFontHandle = ::gdk_font_load(nametouse);
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#ifdef NOISY_FONTS
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fprintf(stderr, " is: %s\n", nametouse);
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#endif
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::XFreeFontInfo(fnames, fonts, numnames);
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}
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else
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{
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//ack. we're in real trouble, go for fixed...
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#ifdef NOISY_FONTS
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fprintf(stderr, " is: %s\n", "fixed (final fallback)");
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#endif
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mFontHandle = ::gdk_font_load("fixed");
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}
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RealizeFont();
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PR_Free(wildstring);
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::Destroy()
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{
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// NS_IF_RELEASE(mDeviceContext);
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return NS_OK;
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}
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char * nsFontMetricsGTK::PickAppropriateSize(char **names, XFontStruct *fonts, int cnt, nscoord desired)
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{
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int idx;
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float app2dev;
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mContext->GetAppUnitsToDevUnits(app2dev);
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PRInt32 desiredpix = NSToIntRound(app2dev * desired);
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XFontStruct *curfont;
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PRInt32 closestmin = -1, minidx;
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//first try an exact or closest smaller match...
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for (idx = 0, curfont = fonts; idx < cnt; idx++, curfont++)
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{
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PRInt32 height = curfont->ascent + curfont->descent;
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if (height == desiredpix)
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break;
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if ((height < desiredpix) && (height > closestmin))
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{
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closestmin = height;
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minidx = idx;
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}
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}
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if (idx < cnt)
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return names[idx];
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else if (closestmin >= 0)
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return names[minidx];
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else
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{
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closestmin = 2000000;
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for (idx = 0, curfont = fonts; idx < cnt; idx++, curfont++)
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{
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PRInt32 height = curfont->ascent + curfont->descent;
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if ((height > desiredpix) && (height < closestmin))
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{
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closestmin = height;
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minidx = idx;
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}
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}
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return names[minidx];
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}
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}
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void nsFontMetricsGTK::RealizeFont()
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{
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nsNativeWidget widget;
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mContext->GetNativeWidget(widget);
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XFontStruct *fontInfo;
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fontInfo = (XFontStruct *)GDK_FONT_XFONT(mFontHandle);
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float f;
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mContext->GetDevUnitsToAppUnits(f);
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mAscent = nscoord(fontInfo->ascent * f);
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mDescent = nscoord(fontInfo->descent * f);
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mMaxAscent = nscoord(fontInfo->ascent * f) ;
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mMaxDescent = nscoord(fontInfo->descent * f);
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mHeight = nscoord((fontInfo->ascent + fontInfo->descent) * f) ;
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mMaxAdvance = nscoord(fontInfo->max_bounds.width * f);
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PRUint32 i;
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for (i = 0; i < 256; i++)
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{
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if ((i < fontInfo->min_char_or_byte2) || (i > fontInfo->max_char_or_byte2))
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mCharWidths[i] = mMaxAdvance;
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else
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mCharWidths[i] = nscoord((fontInfo->per_char[i - fontInfo->min_char_or_byte2].width) * f);
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}
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mLeading = 0;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetXHeight(nscoord& aResult)
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{
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aResult = mMaxAscent / 2; // XXX temporary code!
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetSuperscriptOffset(nscoord& aResult)
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{
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aResult = mMaxAscent / 2; // XXX temporary code!
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetSubscriptOffset(nscoord& aResult)
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{
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aResult = mMaxAscent / 2; // XXX temporary code!
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetStrikeout(nscoord& aOffset, nscoord& aSize)
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{
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aOffset = 0; /* XXX */
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aSize = 0; /* XXX */
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetUnderline(nscoord& aOffset, nscoord& aSize)
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{
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aOffset = 0; /* XXX */
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aSize = 0; /* XXX */
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetHeight(nscoord &aHeight)
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{
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aHeight = mHeight;
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetLeading(nscoord &aLeading)
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{
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aLeading = mLeading;
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetMaxAscent(nscoord &aAscent)
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{
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aAscent = mMaxAscent;
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetMaxDescent(nscoord &aDescent)
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{
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aDescent = mMaxDescent;
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetMaxAdvance(nscoord &aAdvance)
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{
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aAdvance = mMaxAdvance;
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetFont(const nsFont*& aFont)
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{
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aFont = mFont;
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return NS_OK;
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}
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NS_IMETHODIMP nsFontMetricsGTK::GetFontHandle(nsFontHandle &aHandle)
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{
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aHandle = (nsFontHandle)mFontHandle;
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return NS_OK;
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}
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// XXX unused???
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static void MapGenericFamilyToFont(const nsString& aGenericFamily, nsIDeviceContext* aDC,
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nsString& aFontFace)
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{
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// the CSS generic names (conversions from Nav for now)
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// XXX this need to check availability with the dc
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PRBool aliased;
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if (aGenericFamily.EqualsIgnoreCase("serif")) {
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aDC->GetLocalFontName("times", aFontFace, aliased);
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}
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else if (aGenericFamily.EqualsIgnoreCase("sans-serif")) {
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aDC->GetLocalFontName("helvetica", aFontFace, aliased);
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}
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else if (aGenericFamily.EqualsIgnoreCase("cursive")) {
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aDC->GetLocalFontName("script", aFontFace, aliased); // XXX ???
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}
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else if (aGenericFamily.EqualsIgnoreCase("fantasy")) {
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aDC->GetLocalFontName("helvetica", aFontFace, aliased);
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}
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else if (aGenericFamily.EqualsIgnoreCase("monospace")) {
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aDC->GetLocalFontName("fixed", aFontFace, aliased);
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}
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else {
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aFontFace.Truncate();
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}
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}
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@ -26,7 +26,8 @@
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#include "nsIDeviceContext.h"
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#include "nsCRT.h"
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#include <gtk/gtk.h>
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#include <gdk/gdk.h>
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#include <gdk/gdkx.h>
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class nsFontMetricsGTK : public nsIFontMetrics
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{
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@ -61,7 +62,20 @@ public:
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NS_IMETHOD GetFontHandle(nsFontHandle &aHandle);
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protected:
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char *PickAppropriateSize(char **names, XFontStruct *fonts, int cnt, nscoord desired);
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void RealizeFont();
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nsFont *mFont;
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nsIDeviceContext *mContext;
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GdkFont *mFontHandle;
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nscoord mCharWidths[256];
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nscoord mHeight;
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nscoord mAscent;
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nscoord mDescent;
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nscoord mLeading;
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nscoord mMaxAscent;
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nscoord mMaxDescent;
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nscoord mMaxAdvance;
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};
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#endif
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@ -87,8 +87,38 @@ nsRenderingContextGTK :: nsRenderingContextGTK()
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nsRenderingContextGTK :: ~nsRenderingContextGTK()
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{
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NS_IF_RELEASE(mContext);
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if (mRegion) {
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::gdk_region_destroy(mRegion);
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mRegion = nsnull;
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}
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mTMatrix = nsnull;
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// Destroy the State Machine
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if (nsnull != mStateCache)
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{
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PRInt32 cnt = mStateCache->Count();
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while (--cnt >= 0)
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{
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GraphicsState *state = (GraphicsState *)mStateCache->ElementAt(cnt);
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mStateCache->RemoveElementAt(cnt);
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if (nsnull != state)
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delete state;
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}
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delete mStateCache;
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mStateCache = nsnull;
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}
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// Destroy the front buffer and it's GC if one was allocated for it
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if (nsnull != mOffscreenSurface) {
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delete mOffscreenSurface;
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}
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NS_IF_RELEASE(mFontMetrics);
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NS_IF_RELEASE(mContext);
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}
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NS_IMPL_QUERY_INTERFACE(nsRenderingContextGTK, kRenderingContextIID)
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@ -107,7 +137,9 @@ NS_IMETHODIMP nsRenderingContextGTK::Init(nsIDeviceContext* aContext,
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mRenderingSurface->drawable = (GdkDrawable *)aWindow->GetNativeData(NS_NATIVE_WINDOW);
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mRenderingSurface->gc = (GdkGC *)aWindow->GetNativeData(NS_NATIVE_GRAPHIC);
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return NS_OK;
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mOffscreenSurface = mRenderingSurface;
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return (CommonInit());
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}
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NS_IMETHODIMP nsRenderingContextGTK::Init(nsIDeviceContext* aContext,
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@ -117,6 +149,17 @@ NS_IMETHODIMP nsRenderingContextGTK::Init(nsIDeviceContext* aContext,
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NS_IF_ADDREF(mContext);
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mRenderingSurface = (nsDrawingSurfaceGTK *) aSurface;
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return (CommonInit());
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}
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NS_IMETHODIMP nsRenderingContextGTK::CommonInit()
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{
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mContext->GetDevUnitsToAppUnits(mP2T);
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float app2dev;
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mContext->GetAppUnitsToDevUnits(app2dev);
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mTMatrix->AddScale(app2dev, app2dev);
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return NS_OK;
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}
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@ -874,12 +917,6 @@ nsRenderingContextGTK::CopyOffScreenBits(nsDrawingSurface aSrcSurf,
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return NS_OK;
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}
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//locals
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NS_IMETHODIMP nsRenderingContextGTK::CommonInit()
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{
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mContext->GetDevUnitsToAppUnits(mP2T);
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}
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NS_IMETHODIMP
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nsRenderingContextGTK::SetClipRectInPixels(const nsRect& aRect,
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nsClipCombine aCombine,
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