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Readerlink: allow registering empty scheme (#12019)

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This allows plugins to handle relative and otherwise schemeless URLs.

Also: clear registered schemes on each init(), to parallel the situation
with external link buttons, and add documentation.
This commit is contained in:
ziz57
2024-06-13 09:29:43 +01:00
committed by GitHub
parent 9724dcdf4b
commit e4232078ab
1 changed files with 12 additions and 3 deletions
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15
frontend/apps/reader/modules/readerlink.lua
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@@ -67,7 +67,7 @@ local ReaderLink = InputContainer:extend{
location_stack = nil, -- table, per-instance
forward_location_stack = nil, -- table, per-instance
_external_link_buttons = nil,
supported_external_schemes = {"http", "https"},
supported_external_schemes = nil,
}
function ReaderLink:init()
@@ -137,6 +137,9 @@ function ReaderLink:init()
-- delegate gesture listener to readerui, NOP our own
self.ges_events = nil
-- Set always supported external link schemes
self.supported_external_schemes = {"http", "https"}
-- Set up buttons for alternative external link handling methods
self._external_link_buttons = {}
self._external_link_buttons["10_copy"] = function(this, link_url)
@@ -226,6 +229,12 @@ function ReaderLink:init()
end
end
-- Register URL scheme. The external link dialog will be brought up when a URL
-- with a registered scheme is followed; this also applies to schemeless
-- (including relative) URLs if the empty scheme ("") is registered,
-- overriding the default behaviour of treating these as filepaths.
-- Registering the "file" scheme also overrides its default handling.
-- Registered schemes are reset on each initialisation of ReaderLink.
function ReaderLink:registerScheme(scheme)
table.insert(self.supported_external_schemes, scheme)
end
@@ -834,8 +843,8 @@ function ReaderLink:onGotoLink(link, neglect_current_location, allow_footnote_po
end
logger.dbg("ReaderLink:onGotoLink: External link:", link_url)
local scheme = link_url:match("^(%w[%w+%-.]*):")
local is_supported_external_link = scheme and util.arrayContains(self.supported_external_schemes, scheme:lower())
local scheme = link_url:match("^(%w[%w+%-.]*):") or ""
local is_supported_external_link = util.arrayContains(self.supported_external_schemes, scheme:lower())
if is_supported_external_link and self:onGoToExternalLink(link_url) then
return true
end