Aric Stewart : usp10: Improve selection drawing if selection starts in the middle of a cluster.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: dbe168fe9991e0dc8783a3cc468d880c4ff71dae
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=dbe168fe9991e0dc8783a3cc468d880c4ff71dae

Author: Aric Stewart <aric at codeweavers.com>
Date:   Tue Dec 20 08:38:24 2011 -0600

usp10: Improve selection drawing if selection starts in the middle of a cluster.

---

 dlls/usp10/usp10.c |   25 ++++++++++++++++++++++++-
 1 files changed, 24 insertions(+), 1 deletions(-)

diff --git a/dlls/usp10/usp10.c b/dlls/usp10/usp10.c
index 4f532f5..93d7b0f 100644
--- a/dlls/usp10/usp10.c
+++ b/dlls/usp10/usp10.c
@@ -1877,6 +1877,8 @@ static HRESULT SS_ItemOut( SCRIPT_STRING_ANALYSIS ssa,
     INT runStart, runEnd;
     INT iGlyph, cGlyphs;
     HFONT oldFont = 0x0;
+    RECT  crc;
+    int i;
 
     TRACE("(%p,%d,%d,%d,%d,%d, 0x%1x, %d, %d)\n",
          ssa, iX, iY, iItem, cStart, cEnd, uOptions, fSelected, fDisabled);
@@ -1887,6 +1889,7 @@ static HRESULT SS_ItemOut( SCRIPT_STRING_ANALYSIS ssa,
          (cEnd >= 0 && analysis->pItem[iItem].iCharPos >= cEnd))
             return S_OK;
 
+    CopyRect(&crc,prc);
     if (fSelected)
     {
         BkMode = GetBkMode(analysis->hdc);
@@ -1917,6 +1920,7 @@ static HRESULT SS_ItemOut( SCRIPT_STRING_ANALYSIS ssa,
             ScriptStringCPtoX(ssa, cEnd, FALSE, &off_x);
         else
             ScriptStringCPtoX(ssa, analysis->pItem[iItem+1].iCharPos-1, TRUE, &off_x);
+        crc.left = iX + off_x;
     }
     else
     {
@@ -1924,6 +1928,7 @@ static HRESULT SS_ItemOut( SCRIPT_STRING_ANALYSIS ssa,
             ScriptStringCPtoX(ssa, cStart, FALSE, &off_x);
         else
             ScriptStringCPtoX(ssa, analysis->pItem[iItem].iCharPos, FALSE, &off_x);
+        crc.left = iX + off_x;
     }
 
     if (analysis->pItem[iItem].a.fRTL)
@@ -1938,6 +1943,24 @@ static HRESULT SS_ItemOut( SCRIPT_STRING_ANALYSIS ssa,
 
     cGlyphs++;
 
+    /* adjust for cluster glyphs when starting */
+    if (analysis->pItem[iItem].a.fRTL)
+        i = analysis->pItem[iItem+1].iCharPos - 1;
+    else
+        i = analysis->pItem[iItem].iCharPos;
+
+    for (; i >=analysis->pItem[iItem].iCharPos && i < analysis->pItem[iItem+1].iCharPos; (analysis->pItem[iItem].a.fRTL)?i--:i++)
+    {
+        if (analysis->glyphs[iItem].pwLogClust[i - analysis->pItem[iItem].iCharPos] == iGlyph)
+        {
+            if (analysis->pItem[iItem].a.fRTL)
+                ScriptStringCPtoX(ssa, i, TRUE, &off_x);
+            else
+                ScriptStringCPtoX(ssa, i, FALSE, &off_x);
+            break;
+        }
+    }
+
     if (cEnd < 0 || scriptInformation[analysis->pItem[iItem].a.eScript].props.fNeedsCaretInfo)
     {
         INT direction;
@@ -1959,7 +1982,7 @@ static HRESULT SS_ItemOut( SCRIPT_STRING_ANALYSIS ssa,
 
     hr = ScriptTextOut(analysis->hdc,
                        (SCRIPT_CACHE *)&analysis->glyphs[iItem].sc, iX + off_x,
-                       iY, uOptions, prc, &analysis->pItem[iItem].a, NULL, 0,
+                       iY, uOptions, &crc, &analysis->pItem[iItem].a, NULL, 0,
                        &analysis->glyphs[iItem].glyphs[iGlyph], cGlyphs,
                        &analysis->glyphs[iItem].piAdvance[iGlyph], NULL,
                        &analysis->glyphs[iItem].pGoffset[iGlyph]);