Description of the Issue :

When a document is cloned in the secondary view, and some occurrences of a word are highlighted in green, in the primary view, scrolling up/down the original document only highlights, in the secondary view, the visible occurrences of that word, of the primary view

Expected Behaviour :

When a document is cloned in the secondary view, and some occurrences of a word are highlighted in green, in the primary view, scrolling up/down the original document, in primary view should not matter and, all the occurrences of that word, in the secondary view, should be highlighted in green, too !

Debug Information :

Notepad++ v7.8.3 (32-bit)
Build time : Jan 12 2020 - 19:05:42
Path : D:@@\783\notepad++.exe
Admin mode : OFF
Local Conf mode : ON
OS Name : Microsoft Windows XP (32-bit)
OS Build : 2600.0
Plugins : mimeTools.dll NppConverter.dll NppExport.dll

Hypotheses :

• Notepad++ version used : v7.8.3

• No extra plugin installed, just the 3 default ones

• Options ticked in Preferences... > Highlighting > Smart Highlighting : Enable, Match whole word only and Highlight another view. All the other options un-ticked

• Disable the multi-line tabs feature by un-ticking the option Preferences... > General > Tab Bar > Multi-line => 1 row of tabs, only !

• The Horizontal splitter between primary and secondary is selected. If not, simply right-click on the splitter and choose the Rotate to left option

• Default zoom is used, both, in primary and secondary view ( Ctrl + Numpad / )

• No horizontal nor vertical synchronization of the two views. So, un-tick the options View > Synchronize Vertical Scrolling and View > Synchronize Horizontal Scrolling

• For readability, enable the line numbers column, in Preferences... > Editing > Display line number

Steps to reproduce the Issue :

• Open a new tab

• Hit the Enter key to create 20 empty lines

• Then , append 10 lines containing the string ABCDE ( so, from lines 21 to 30 )

• End with 2 empty lines ( lines 31 and 32 )

• Save it as Test.txt

• Select the option View > Move/Clone Current Document > Clone to Other View => The cloned document Test.txt is located at bottom of screen

• Move line 16 as the first line in the secondary view

• Now, select the original Test.txt tab, on top of screen

• In the same way, move line 16 as the first line of the primary view

• Double-click on line 23 of the primary view => The ten lines ABCDE, in each view, are highlighted, as expected

• Then, while keeping the mouse pointer over the primary view, scroll down , with the mouse wheel ( or with the vertical bar ) , until no text is present => Only the visible line(s) of the primary view is/are highlighted in the secondary view !

• Now, scroll up, with the mouse wheel, until no text is present => In the same way, only the visible line(s) of the primary view is/are highlighted in the secondary view !

Remarks :

• If, without changing the active top tab ( primary view ), we place the mouse pointer over the secondary view and scroll up/down, with the mouse wheel, nothing is changed in the primary view and the ten lines are always highlighted

• If we stop and re-start Notepad++ with the Test.txt displayed in each view, this minor bug still occurs

• I also noticed this behaviour, with the old N++ 7.2 version, which was the first release which included the Highlight another view option, regarding the Smart Highlighting feature !

• Although not tested, I suppose that the recent v7.8.4 version does produce the same bug

Important :

• Instead of cloning the file Test.txt, in the secondary view, let's create a copy of the file Test.txt, named Copy.txt

• Open this new file, in the secondary view, with the option View > Move/Clone Current Document > Move to Other View

• This time, if we repeat the above steps, whatever the visible lines ABCDE, in the primary view, obtained by scrolling text up or down, the ten lines ABCDE of the identical file Copy.txt are always highlighted, in the secondary view, as expected !

Best Regards,

guy038