Mozilla2:GFXTextRun: Difference between revisions

Mozilla2:GFXTextRun (view source)

Revision as of 00:12, 12 October 2005

1,347 bytes added , 12 October 2005

→‎Class gfxTextRun

Roc

1,295

edits

@@ Line 12: / Line 12: @@
    // ClusterStart: character is the first character of a cluster
    void GetCharacterFlags(int pos, int len, CharFlags* flags);
+  void SetWordStartEnd(PRBool startsWord, PRBool endsWord);
+  void SetLineStartEnd(PRBool startsLine, PRBool endsLine);
+  // Set the spacing between clusters. For each character index i that is
+  // the start of a cluster, spacingArray[i] is the amount of space to insert
+  // before that cluster (possibly negative). For each character index i that
+  // is not the start of a cluster, spacingArray[i] must be zero.
+  // spacingArray[0] must be zero.
+  void SetSpacing(gfxFloat* spacingArray);
+  // The substring must not contain any partial clusters. 'pt' is the
+  // the baseline of the visually left edge of the visually leftmost cluster.
+  void Draw(gfxContext* ctx, gfxPoint& pt, int pos, int len);
    struct Dimensions {
-     gfxFloat ascent, descent, width, leftBearing, rightBearing;
+    // start of the substring relative to the origin of the whole string
+    gfxFloat xOffset;
+    // width of the substring;
+    gfxFloat width;
+    // amount by which the glyphs visually extend to the left of xOffset and
+    // to the right of xOffset+width
+    gfxFloat leftBearing, rightBearing;
+    // font ascent and descent for this substring
+     gfxFloat ascent, descent;
+    // visual ascent and descent for this substring (area actually drawn by
+    // glyphs --- needed for MathML I think)
+    gfxFloat visualAscent, visualDescent;
    };
+  // The substring must not contain any partial clusters
    Dimensions MeasureText(int pos, int len);
@@ Line 24: / Line 50: @@
    // We will usually want to call MeasureText right afterwards,
    // the implementor could optimize for that.
+  // The substring must not contain any partial clusters
    int GetCharsFit(int pos, int len, gfxFloat width, int breakflags);
+  // If the user clicks the mouse at point pt,
    int GetPositionInString(gfxPoint& pt);
 };