[Lazarus] lHelp improvements

[Sergey Bodrov]

chm indexes opens and reads in milliseconds. But filling Index TreeView in
LHelp takes seconds of time. Place BeginUpdate / EndUpdate around TreeView
filling, and delay will gone.

hh.exe can use external combined Index and Search for multiple chm's.

On Sun, Dec 27, 2020, 17:15 Соболь Андрей Евгеньевич via lazarus <
lazarus at lists.lazarus-ide.org> wrote:

> Hi, guys.
>
> I am trying to do the lHelp more convenient. And after I have combined a
> chm indexes on start, I think about next step. What I see...
> 1. Exist a contradiction of behavior for contex searching through hh.exe
> (windows) an lHelp (this is for first start of help subsystem):
> - When I press F1 for hh.exe enabled for context searching, then Lazarus
> send only one command - open chm file and seek TOC index position.
> - When I press F1 for the lHelp enabled for context searching, then
> Lazarus send group of command as
>
>     got BeginUpdate
>     got BeginUpdate
>     got rturl, filename M:\lazarus\docs\chm\fcl.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\fclres.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\fpdoc.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\ideintf.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\lazutils.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\lcl.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\prog.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\ref.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\rtl.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\toc.chm, url /index.html
>     got rturl, filename M:\lazarus\docs\chm\user.chm, url /index.html
>     got EndUpdate
>     got rturl, filename M:\lazarus\docs\chm\ref.chm, url
> /ref/refse92.html#keyword_function
>     got EndUpdate
>     got rtmisc/mrShow
>
>     Lazarus sends commands for opening all chm files and the last command
> is for performing contex search. As result hh.exe always does it more
> faster then lHelp. I think behavior have to be same, only a perform of
> context seaching. On second request lHelp can open next file and index and
> so on.
>
> 2. I think that the lHelp (or user) should make a decision myself, open
> all indexes on first start or none (for contex search primarily). It should
> have own preferences for that. But the lHelp don`t have any information
> about searchpath where is chm files. I can add a new command for sending
> searchpath or add new option to Lazarus (open all indexes on first start -
> see paragraph  1).
>
> 3. lHelp got a start command with the option "--hide" at start. Then lHelp
> gets many commands on openning of indexes. I think that I have the right to
> show lHelp or splash screen on getting first command. Without this, the
> user gets a hanging program (1-3 sec) and does not understand what happens.
> This is for the case when I open all the indexes.
>
> What is your opinion about it?
> --
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> lazarus at lists.lazarus-ide.org
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>
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