From: Javier Jaramago Fernández <jaramago.fernandez.javier@gmail.com>
Date: Tue, 3 Mar 2026 20:26:37 +0000 (+0000)
Subject: patch 9.2.0104: popup: flickering on opaque popups with overlapping text
X-Git-Tag: v9.2.0104^0
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a7414594af8d4cd5920c7628953a2d51ec50a02;p=thirdparty%2Fvim.git

patch 9.2.0104: popup: flickering on opaque popups with overlapping text

Problem:  popup: flickering on opaque popups with overlapping text,
          even if they are opaque (after v9.2.0016).
Solution: Prevent double redrawing by skipping background updates for
          opaque popups. Revert changes to test dumps
          (Javier Jaramago Fernández).

A flickering effect was introduced in commit v9.2.0016 (commit:
6c203072f) for all popups. This is a consequence of a double redraw of
the overlapping background characters. This could be expected for
transparent popups, but, it should exclude opaque ones. For a complete
fix of the flickering this commit is required in combination with fix
present in v9.2.0064 (commit: 97c5bed84b).

Additionally this commit reverts changes introduced for tests dumps for
masks in commits 6c203072f and cded5e220. These dumps were updated
preventing characters from popups to take into account the masks
specified for them. This forces the redraw of popup characters, even
when masks attempt to prevent them, leading to flickering effects. See
issues #19510 and PR: #19534.

closes: #19534

Signed-off-by: Javier Jaramago Fernández <jaramago.fernandez.javier@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---

diff --git a/src/screen.c b/src/screen.c
index 1fb9a70aaf..f6a8b49510 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -591,33 +591,41 @@ screen_line(
 	// skip the second cell for double-width characters.
 	if (redraw_this && char_cells == 2 && skip_for_popup(row, col + coloff + 1))
 	    redraw_this = FALSE;
-	// For transparent popup cells, update the background character
-	// so it shows through the popup.
+	// Check if the character is occluded by a popup.
 	if (redraw_this && skip_for_popup(row, col + coloff))
 	{
-	    ScreenLines[off_to] = ScreenLines[off_from];
-	    ScreenAttrs[off_to] = ScreenAttrs[off_from];
-	    if (enc_utf8)
+#ifdef FEAT_PROP_POPUP
+	    // For transparent popup cells, update the background character
+	    // so it shows through the popup.
+	    if (screen_opacity_popup && screen_opacity_popup->w_popup_blend > 0)
 	    {
-		ScreenLinesUC[off_to] = ScreenLinesUC[off_from];
-		if (ScreenLinesUC[off_from] != 0)
+		ScreenLines[off_to] = ScreenLines[off_from];
+		ScreenAttrs[off_to] = ScreenAttrs[off_from];
+		if (enc_utf8)
 		{
-		    for (int i = 0; i < Screen_mco; ++i)
+		    ScreenLinesUC[off_to] = ScreenLinesUC[off_from];
+		    if (ScreenLinesUC[off_from] != 0)
+		    {
+			for (int i = 0; i < Screen_mco; ++i)
 			ScreenLinesC[i][off_to] = ScreenLinesC[i][off_from];
+		    }
 		}
-	    }
-	    if (char_cells == 2)
-	    {
-		ScreenLines[off_to + 1] = ScreenLines[off_from + 1];
-		ScreenAttrs[off_to + 1] = ScreenAttrs[off_from];
-	    }
-	    if (enc_dbcs == DBCS_JPNU) // Copilot's suggestion for DBCS_JPNU
-		ScreenLines2[off_to] = ScreenLines2[off_from];
+		if (char_cells == 2)
+		{
+		    ScreenLines[off_to + 1] = ScreenLines[off_from + 1];
+		    ScreenAttrs[off_to + 1] = ScreenAttrs[off_from];
+		}
+		if (enc_dbcs == DBCS_JPNU) // Copilot's suggestion for DBCS_JPNU
+		    ScreenLines2[off_to] = ScreenLines2[off_from];
 
-	    if (enc_dbcs != 0 && char_cells == 2)
-		screen_char_2(off_to, row, col + coloff);
+		if (enc_dbcs != 0 && char_cells == 2)
+		    screen_char_2(off_to, row, col + coloff);
+		else
+		    screen_char(off_to, row, col + coloff);
+	    }
 	    else
-		screen_char(off_to, row, col + coloff);
+#endif
+		redraw_this = FALSE;
 	}
 
 #ifdef FEAT_PROP_POPUP
diff --git a/src/testdir/dumps/Test_popupwin_mask_1.dump b/src/testdir/dumps/Test_popupwin_mask_1.dump
index f309d20ddd..2fa0d7c2d9 100644
--- a/src/testdir/dumps/Test_popupwin_mask_1.dump
+++ b/src/testdir/dumps/Test_popupwin_mask_1.dump
@@ -1,12 +1,12 @@
 >1+0&#ffffff0|2|3|4|5|6|7|8|9|1| +0&#e0e0e08@12|1+0&#ffffff0|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
-|1|2|3|4|5|6|7|8|9| +0&#e0e0e08|s|o|m|e| |t|e|x|t| @3|1+0&#ffffff0|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
-|1|2|3|4|5|6|7|8|9| +0&#e0e0e08|a|n|o|t|h|e|r| |l|i|n|e| |x+0#0000001#ffd7ff255@2|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
+|1|2|3|4|5|6|7|8|9| +0&#e0e0e08|s|o|m|e| |1+0&#ffffff0|3|1|t+0&#e0e0e08| @3|1+0&#ffffff0|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
+|1|2|3|4|5|6|7|8|9| +0&#e0e0e08|0+0&#ffffff0|1@1|t+0&#e0e0e08|h|1+0&#ffffff0|3|x+0#0000001#ffd7ff255|l+0#0000000#e0e0e08|i|n|e| |x+0#0000001#ffd7ff255@2|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9| +0&#e0e0e08@8|y+0#0000001#ffd7ff255@7|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1|0|1@2|2|1|3|1|4|1|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1|0|1@2|2|1|3|1|4|1|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
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 |1|2|3|4|5|6|7|8|9|║+0#0000001#ffd7ff255| @4|1+0#0000000#ffffff0|3|1| +0#0000001#ffd7ff255@6|║|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
-|1|2|3|4|5|6|7|8|9|║+0#0000001#ffd7ff255| |j|u|s|t| |o|n|e| |l|i|n|e| |║|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
+|1|2|3|4|5|6|7|8|9|║+0#0000001#ffd7ff255| |j|u|s|t|1+0#0000000#ffffff0|3|1|e+0#0000001#ffd7ff255| |l|i|n|e| |║|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|║+0#0000001#ffd7ff255| @10|1+0#0000000#ffffff0|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|╚+0#0000001#ffd7ff255|═|1+0#0000000#ffffff0@2|═+0#0000001#ffd7ff255@4|1+0#0000000#ffffff0|5|1|6|═+0#0000001#ffd7ff255@1|╝|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1|0|1@2|2|1|3|1|4|1|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
diff --git a/src/testdir/dumps/Test_popupwin_mask_2.dump b/src/testdir/dumps/Test_popupwin_mask_2.dump
index 41a1c3dfdb..173d40a6f9 100644
--- a/src/testdir/dumps/Test_popupwin_mask_2.dump
+++ b/src/testdir/dumps/Test_popupwin_mask_2.dump
@@ -1,12 +1,12 @@
 >1+0&#ffffff0|2|3|4|5|6|7|8|9|1|0|1@2|2|1|3|1|4|1|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1|0| +0&#e0e0e08@12|7+0&#ffffff0|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
-|1|2|3|4|5|6|7|8|9|1| +0&#e0e0e08|s|o|m|e| |t|e|x|t| @3|x+0#0000001#ffd7ff255@1|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
-|1|2|3|4|5|6|7|8|9|1| +0&#e0e0e08|a|n|o|t|h|e|r| |l|i|n|e| |y+0#0000001#ffd7ff255@1|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
+|1|2|3|4|5|6|7|8|9|1| +0&#e0e0e08|s|o|m|e| |3+0&#ffffff0|x+0#0000001#ffd7ff255@1|t+0#0000000#e0e0e08| @3|x+0#0000001#ffd7ff255@1|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
+|1|2|3|4|5|6|7|8|9|1| +0&#e0e0e08|1+0&#ffffff0@2|t+0&#e0e0e08|h|3+0&#ffffff0|y+0#0000001#ffd7ff255@1|l+0#0000000#e0e0e08|i|n|e| |y+0#0000001#ffd7ff255@1|8+0#0000000#ffffff0|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1| +0&#e0e0e08@8|1+0&#ffffff0|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1|0|1@2|2|1|3|1|4|1|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1|0|1@1|═+0#0000001#ffd7ff255@13|X|9+0#0000000#ffffff0|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
 |1|2|3|4|5|6|7|8|9|1|0|║+0#0000001#ffd7ff255| @4|1+0#0000000#ffffff0|4|1| +0#0000001#ffd7ff255@6|║|9+0#0000000#ffffff0|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
-|1|2|3|4|5|6|7|8|9|1|0|║+0#0000001#ffd7ff255| |j|u|s|t| |o|n|e| |l|i|n|e| |║|9+0#0000000#ffffff0|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
+|1|2|3|4|5|6|7|8|9|1|0|║+0#0000001#ffd7ff255| |j|u|s|t|1+0#0000000#ffffff0|4|1|e+0#0000001#ffd7ff255| |l|i|n|e| |║|9+0#0000000#ffffff0|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
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 |1|2|3|4|5|6|7|8|9|1|0|1@2|2|1|3|1|4|1|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7|3|8|3|9|4|0|4|1|4|2
diff --git a/src/testdir/dumps/Test_popupwin_mask_3.dump b/src/testdir/dumps/Test_popupwin_mask_3.dump
index 7d5f0604f0..40681fb4ca 100644
--- a/src/testdir/dumps/Test_popupwin_mask_3.dump
+++ b/src/testdir/dumps/Test_popupwin_mask_3.dump
@@ -1,12 +1,12 @@
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 |1|2|3|4|5|6|7|8|9|1|0|1@2|2|1|3|1|4|1|5|1|6|1|7|1|8|1|9|2|0|2|1|2@2|3|2|4|2|5|2|6|2|7|2|8|2|9|3|0|3|1|3|2|3@2|4|3|5|3|6|3|7| +0&#e0e0e08@9
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diff --git a/src/testdir/dumps/Test_popupwin_mask_4.dump b/src/testdir/dumps/Test_popupwin_mask_4.dump
index 24540b036c..0cf44d2c25 100644
--- a/src/testdir/dumps/Test_popupwin_mask_4.dump
+++ b/src/testdir/dumps/Test_popupwin_mask_4.dump
@@ -1,12 +1,12 @@
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diff --git a/src/testdir/dumps/Test_popupwin_mask_5.dump b/src/testdir/dumps/Test_popupwin_mask_5.dump
index 9462c23977..78cc6f0858 100644
--- a/src/testdir/dumps/Test_popupwin_mask_5.dump
+++ b/src/testdir/dumps/Test_popupwin_mask_5.dump
@@ -9,5 +9,5 @@
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diff --git a/src/testdir/dumps/Test_popupwin_popupmenu_masking_1.dump b/src/testdir/dumps/Test_popupwin_popupmenu_masking_1.dump
index 4992a11dab..9cf41490cb 100644
--- a/src/testdir/dumps/Test_popupwin_popupmenu_masking_1.dump
+++ b/src/testdir/dumps/Test_popupwin_popupmenu_masking_1.dump
@@ -1,7 +1,7 @@
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+|~| @23| +0#0000001#ffd7ff255|a|n|o|t|w|r|d| |W| |e|x|t|r|a| |t|e|x|t| |╚+0&#e0e0e08|═@15|⇲| +0#4040ff13#ffffff0@9
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 |~| @19|p+0#0000000#ffff4012|o|p|u|p| |o|n| |t|o|p| +0#0000001#ffd7ff255|W| |e|x|t|r|a| |t|e|x|t| | +0#4040ff13#ffffff0@27
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 |~| @73
diff --git a/src/version.c b/src/version.c
index 17088a487b..4ad24ed111 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    104,
 /**/
     103,
 /**/