perf(preview): fix bad performance previewer label on Windows/Linux

[linrongbin16]

Regresion test

Platforms

• [ ] windows
• [ ] macOS
• [ ] linux

Tasks

• [ ] FzfxFiles
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-R to switch between restricted/unrestricted mode, and the lines count is consistent when press multiple times.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to open file, and open the test/hello world.txt, test/goodbye world/goodbye.lua files.
  • Both fd and find works.
• [ ] FzfxLiveGrep
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-R to switch between restricted/unrestricted mode, and the lines count is consistent when press multiple times.
  • Use -w to match word only, use -g *.lua to search only lua files.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to open file, and open the test/hello world.txt, test/goodbye world/goodbye.lua files.
  • Both rg and grep works.
• [ ] FzfxBuffers
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-D to delete buffers, and delete the test/hello world.txt, test/goodbye world/goodbye.lua buffers.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to open file.
• [ ] FzfxGFiles
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-W to switch between workspace/current folder mode.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to open file.
• [ ] FzfxGStatus
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-W to switch between workspace/current folder mode.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to open file.
  • Both with/without delta works.
• [ ] FzfxGBranches
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-R/CTRL-O to switch between local/remote branches.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to checkout branch.
• [ ] FzfxGCommits
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-A to switch between git repo commits/current buffer commits.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to copy commit hash.
  • Both with/without delta works.
• [ ] FzfxGBlame
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to copy commit hash.
  • Both with/without delta works.
• [ ] FzfxLspDiagnostics
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-W to switch between workspace/current buffer diagnostics.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to open file.
• [ ] FzfxLspDefinitions, FzfxLspTypeDefinitions, FzfxLspReferences, FzfxLspImplementations
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Go to definitions/references (this is the most 2 easiest use case when developing this lua plugin with lua_ls).
  • Press ESC to quit, ENTER to open file.
• [ ] FzfxCommands
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-E/CTRL-A to switch between user/ex/all vim commands.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to feed vim command.
• [ ] FzfxKeyMaps
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-O/CTRL-I/CTRL-A/CTRL-V to switch between normal/insert/visual/all vim key mappings.
  • Use V/W/P variants (visual selection, cursor word, yank text).
  • Press ESC to quit, ENTER to feed vim keys.
• [ ] FzfxFileExplorer
  • Press CTRL-N/CTRL-P to move down/up and preview contents.
  • Press CTRL-U/CTRL-R to switch between filter/include hidden files mode.
  • Press ALT-L/ALT-H to cd into folder and cd upper folder.
  • Press ESC to quit, ENTER to open file, and open the test/hello world.txt, test/goodbye world/goodbye.lua files.
  • All eza/lsd/ls works.

[linrongbin16]

sad, I didn't use a real Windows PC to test this preview label feature, it's really laggy.

have to try to fix it.

[codecov[bot]]

Codecov Report

Attention: 130 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
lua/fzfx.lua	80.43% <100.00%> (+0.43%)	:arrow_up:
lua/fzfx/log.lua	98.80% <100.00%> (+1.21%)	:arrow_up:
lua/fzfx/server.lua	91.01% <66.66%> (ø)
lua/fzfx/general.lua	49.53% <9.09%> (-0.28%)	:arrow_down:
lua/fzfx/shell_helpers.lua	44.96% <2.94%> (-26.18%)	:arrow_down:
lua/fzfx/pipe_server.lua	30.89% <30.89%> (ø)

... and 2 files with indirect coverage changes

:loudspeaker: Thoughts on this report? Let us know!

[linrongbin16]

seems we have to revert this feature, I didn't have a good way to do it really.

I don't know why macOS don't have this issue....

[linrongbin16]

revert in #401