[Github-comments] Re: [geany/geany] [GeanyLua Plugin] Change case tools (Discussion #4086)

[advice2020 via Github-comments]

APPLY CASE
```
local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  geany.selection(string.lower(s))
end

local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  geany.selection(string.upper(s))
end

local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  local s1 = string.upper(string.sub(s, 1, 1))
  local s2 =  string.lower(string.sub(s, 2, -1))
  geany.selection(s1 .. s2)
end

local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  s = string.gsub(string.lower(s), "^(%w)", string.upper)
  s = string.gsub(s, "([^%w]%w)", string.upper)
  geany.selection(s)
end
```

APPLY CASE & KEEP ITEMS SELECTED
```
local start, stop = geany.select()
local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  geany.selection(string.lower(s))
  geany.select(start, stop)
end

local start, stop = geany.select()
local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  geany.selection(string.upper(s))
  geany.select(start, stop)
end

local start, stop = geany.select()
local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  local s1 = string.upper(string.sub(s, 1, 1))
  local s2 =  string.lower(string.sub(s, 2, -1))
  geany.selection(s1 .. s2)
  geany.select(start, stop)
end

local start, stop = geany.select()
local s = geany.selection()
if (s ~= nil) and (s ~= "") then
  s = string.gsub(string.lower(s), "^(%w)", string.upper)
  s = string.gsub(s, "([^%w]%w)", string.upper)
  geany.selection(s)
  geany.select(start, stop)
end
```

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