From 0fda889f3528cf7929c3b8540ed6315f0eb25e41 Mon Sep 17 00:00:00 2001
From: Huw Davies <huw@codeweavers.com>
Date: Mon, 26 Oct 2020 08:46:39 +0000
Subject: [PATCH] riched20: Use row ptrs in the cursor from virtual co-ords
 function.

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 dlls/riched20/caret.c  | 16 +++++++---------
 dlls/riched20/editor.h |  2 ++
 dlls/riched20/para.c   | 19 +++++++++++++++++++
 dlls/riched20/row.c    |  4 ++--
 4 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/dlls/riched20/caret.c b/dlls/riched20/caret.c
index 0c5f221a7c4..5af4cd04d55 100644
--- a/dlls/riched20/caret.c
+++ b/dlls/riched20/caret.c
@@ -952,7 +952,7 @@ static BOOL cursor_from_virtual_coords( ME_TextEditor *editor, int x, int y,
                                         ME_Cursor *result, BOOL final_eop )
 {
   ME_Paragraph *para = editor_first_para( editor );
-  ME_DisplayItem *row = NULL;
+  ME_Row *row = NULL, *next_row;
   BOOL isExact = TRUE;
 
   x -= editor->rcFormat.left;
@@ -966,7 +966,7 @@ static BOOL cursor_from_virtual_coords( ME_TextEditor *editor, int x, int y,
       if (para->nFlags & MEPF_ROWSTART)
         para = pixel_pos_in_table_row( x, y, para );
       y -= para->pt.y;
-      row = ME_FindItemFwd( para_get_di( para ), diStartRow);
+      row = para_first_row( para );
       break;
     }
     else if (para->nFlags & MEPF_ROWSTART)
@@ -977,24 +977,22 @@ static BOOL cursor_from_virtual_coords( ME_TextEditor *editor, int x, int y,
   /* find row */
   while (row)
   {
-    ME_DisplayItem *next_row;
-
-    if (y < row->member.row.pt.y + row->member.row.nHeight) break;
-    next_row = ME_FindItemFwd(row, diStartRow);
+    if (y < row->pt.y + row->nHeight) break;
+    next_row = row_next( row );
     if (!next_row) break;
     row = next_row;
   }
 
-  if (!row && !final_eop)
+  if (!row && !final_eop && para_prev( para ))
   {
     /* The position is below the last paragraph, so the last row will be used
      * rather than the end of the text, so the x position will be used to
      * determine the offset closest to the pixel position. */
     isExact = FALSE;
-    row = ME_FindItemBack( para_get_di( para ), diStartRow);
+    row = para_end_row( para_prev( para ) );
   }
 
-  if (row) return row_cursor( editor, &row->member.row, x, result ) && isExact;
+  if (row) return row_cursor( editor, row, x, result ) && isExact;
 
   ME_SetCursorToEnd(editor, result, TRUE);
   return FALSE;
diff --git a/dlls/riched20/editor.h b/dlls/riched20/editor.h
index cf5e2d84fc2..7025ddceea7 100644
--- a/dlls/riched20/editor.h
+++ b/dlls/riched20/editor.h
@@ -213,7 +213,9 @@ void ME_SetDefaultParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt) DECLSPEC_
 int get_total_width(ME_TextEditor *editor) DECLSPEC_HIDDEN;
 ME_Cell *para_cell( ME_Paragraph *para ) DECLSPEC_HIDDEN;
 void para_destroy( ME_TextEditor *editor, ME_Paragraph *item ) DECLSPEC_HIDDEN;
+ME_Row *para_end_row( ME_Paragraph *para ) DECLSPEC_HIDDEN;
 ME_Run *para_end_run( ME_Paragraph *para ) DECLSPEC_HIDDEN;
+ME_Row *para_first_row( ME_Paragraph *para ) DECLSPEC_HIDDEN;
 ME_Run *para_first_run( ME_Paragraph *para ) DECLSPEC_HIDDEN;
 BOOL para_in_table( ME_Paragraph *para ) DECLSPEC_HIDDEN;
 ME_Paragraph *para_join( ME_TextEditor *editor, ME_Paragraph *para, BOOL use_first_fmt ) DECLSPEC_HIDDEN;
diff --git a/dlls/riched20/para.c b/dlls/riched20/para.c
index db258947916..e1b848cf8f9 100644
--- a/dlls/riched20/para.c
+++ b/dlls/riched20/para.c
@@ -130,6 +130,25 @@ ME_Cell *para_cell( ME_Paragraph *para )
     return &para->pCell->member.cell;
 }
 
+ME_Row *para_first_row( ME_Paragraph *para )
+{
+    ME_DisplayItem *item;
+
+    item = ME_FindItemFwd( para_get_di( para ), diStartRowOrParagraph );
+    if (!item || item->type != diStartRow) return NULL;
+    return &item->member.row;
+}
+
+ME_Row *para_end_row( ME_Paragraph *para )
+{
+    ME_DisplayItem *item;
+
+    para = para_next( para );
+    item = ME_FindItemBack( para_get_di( para ), diStartRowOrParagraph );
+    if (!item || item->type != diStartRow) return NULL;
+    return &item->member.row;
+}
+
 void ME_MakeFirstParagraph(ME_TextEditor *editor)
 {
   static const WCHAR cr_lf[] = {'\r','\n',0};
diff --git a/dlls/riched20/row.c b/dlls/riched20/row.c
index a149231dcbe..ce8de935a19 100644
--- a/dlls/riched20/row.c
+++ b/dlls/riched20/row.c
@@ -28,8 +28,8 @@ ME_Row *row_next( ME_Row *row )
 {
     ME_DisplayItem *item;
 
-    item = ME_FindItemFwd( row_get_di( row ), diStartRow );
-    if (!item) return NULL;
+    item = ME_FindItemFwd( row_get_di( row ), diStartRowOrParagraphOrEnd );
+    if (!item || item->type != diStartRow) return NULL;
     return &item->member.row;
 }
 
-- 
2.11.4.GIT