From: Alex Henrie <alexhenrie24@gmail.com>
Subject: [PATCH] riched20: Consider adjacent runs when computing EN_LINK range.
Message-Id: <20140615231543.b89cfaa54a6532d524c33d53@gmail.com>
Date: Sun, 15 Jun 2014 23:15:43 -0600

Fixes bug 35948.
---
 dlls/riched20/editor.c       | 21 +++++++++++++++-
 dlls/riched20/tests/editor.c | 57 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/dlls/riched20/editor.c b/dlls/riched20/editor.c
index 0127616..2af2582 100644
--- a/dlls/riched20/editor.c
+++ b/dlls/riched20/editor.c
@@ -3093,6 +3093,8 @@ static void ME_LinkNotify(ME_TextEditor *editor, UINT msg, WPARAM wParam, LPARAM
   if (cursor.pRun->member.run.style->fmt.dwMask & CFM_LINK &&
       cursor.pRun->member.run.style->fmt.dwEffects & CFE_LINK)
   { /* The clicked run has CFE_LINK set */
+    ME_DisplayItem *di;
+
     info.nmhdr.hwndFrom = NULL;
     info.nmhdr.idFrom = 0;
     info.nmhdr.code = EN_LINK;
@@ -3100,8 +3102,25 @@ static void ME_LinkNotify(ME_TextEditor *editor, UINT msg, WPARAM wParam, LPARAM
     info.wParam = wParam;
     info.lParam = lParam;
     cursor.nOffset = 0;
+
+    /* find the first contiguous run with CFE_LINK set */
     info.chrg.cpMin = ME_GetCursorOfs(&cursor);
-    info.chrg.cpMax = info.chrg.cpMin + cursor.pRun->member.run.len;
+    for (di = cursor.pRun->prev;
+         di && di->type == diRun && (di->member.run.style->fmt.dwMask & CFM_LINK) && (di->member.run.style->fmt.dwEffects & CFE_LINK);
+         di = di->prev)
+    {
+      info.chrg.cpMin -= di->member.run.len;
+    }
+
+    /* find the last contiguous run with CFE_LINK set */
+    info.chrg.cpMax = ME_GetCursorOfs(&cursor) + cursor.pRun->member.run.len;
+    for (di = cursor.pRun->next;
+         di && di->type == diRun && (di->member.run.style->fmt.dwMask & CFM_LINK) && (di->member.run.style->fmt.dwEffects & CFE_LINK);
+         di = di->next)
+    {
+      info.chrg.cpMax += di->member.run.len;
+    }
+
     ITextHost_TxNotify(editor->texthost, info.nmhdr.code, &info);
   }
 }
diff --git a/dlls/riched20/tests/editor.c b/dlls/riched20/tests/editor.c
index 2a85357..5421614 100644
--- a/dlls/riched20/tests/editor.c
+++ b/dlls/riched20/tests/editor.c
@@ -5937,6 +5937,62 @@ static void test_WM_NOTIFY(void)
     DestroyWindow(parent);
 }
 
+static int cpMin_EN_LINK = -1;
+static int cpMax_EN_LINK = -1;
+
+static LRESULT WINAPI EN_LINK_ParentMsgCheckProcA(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    ENLINK* enlink = (ENLINK*)lParam;
+    if(message == WM_NOTIFY && enlink->nmhdr.code == EN_LINK)
+    {
+        cpMin_EN_LINK = enlink->chrg.cpMin;
+        cpMax_EN_LINK = enlink->chrg.cpMax;
+    }
+    return DefWindowProcA(hwnd, message, wParam, lParam);
+}
+
+static void test_EN_LINK(void)
+{
+    HWND parent;
+    WNDCLASSA cls;
+    HWND hwndRichedit_EN_LINK;
+    CHARFORMAT2A cf2;
+
+    /* register class to capture WM_NOTIFY */
+    cls.style = 0;
+    cls.lpfnWndProc = EN_LINK_ParentMsgCheckProcA;
+    cls.cbClsExtra = 0;
+    cls.cbWndExtra = 0;
+    cls.hInstance = GetModuleHandleA(0);
+    cls.hIcon = 0;
+    cls.hCursor = LoadCursorA(0, (LPCSTR)IDC_ARROW);
+    cls.hbrBackground = GetStockObject(WHITE_BRUSH);
+    cls.lpszMenuName = NULL;
+    cls.lpszClassName = "EN_LINK_ParentClass";
+    if(!RegisterClassA(&cls)) assert(0);
+
+    parent = CreateWindowA(cls.lpszClassName, NULL, WS_POPUP|WS_VISIBLE,
+                           0, 0, 200, 60, NULL, NULL, NULL, NULL);
+    ok(parent != 0, "Failed to create parent window\n");
+
+    hwndRichedit_EN_LINK = new_richedit(parent);
+    ok(hwndRichedit_EN_LINK != 0, "Failed to create edit window\n");
+
+    SendMessageA(hwndRichedit_EN_LINK, EM_SETEVENTMASK, 0, ENM_LINK);
+
+    cf2.cbSize = sizeof(CHARFORMAT2A);
+    cf2.dwMask = CFM_LINK;
+    cf2.dwEffects = CFE_LINK;
+    SendMessageA(hwndRichedit_EN_LINK, EM_SETCHARFORMAT, 0, (LPARAM)&cf2);
+    /* mixing letters and numbers causes runs to be split */
+    SendMessageA(hwndRichedit_EN_LINK, WM_SETTEXT, 0, (LPARAM)"link text with at least 2 runs");
+    SendMessageA(hwndRichedit_EN_LINK, WM_LBUTTONDOWN, 0, MAKELPARAM(5, 5));
+    ok(cpMin_EN_LINK == 0 && cpMax_EN_LINK == 31, "Expected link range [0,31) got [%i,%i)\n", cpMin_EN_LINK, cpMax_EN_LINK);
+
+    DestroyWindow(hwndRichedit_EN_LINK);
+    DestroyWindow(parent);
+}
+
 static void test_undo_coalescing(void)
 {
     HWND hwnd;
@@ -7565,6 +7621,7 @@ START_TEST( editor )
   test_EM_REPLACESEL(1);
   test_EM_REPLACESEL(0);
   test_WM_NOTIFY();
+  test_EN_LINK();
   test_EM_AUTOURLDETECT();
   test_eventMask();
   test_undo_coalescing();
-- 
1.9.1