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-- mod-version:3
local core = require "core"
local command = require "core.command"
local keymap = require "core.keymap"
local common = require "core.common"
local DocView = require "core.docview"
local nodes_visit_order = setmetatable({}, {__mode = "k"})
---When true, releasing all the modifier keys will accept the selection
local hold_mode = false
---Whether or not the CommandView relative to this plugin is active
local in_switcher = false
---@param t table<any, boolean?>
---@return boolean
local function any_true(t)
for _, v in pairs(t) do
if v then return true end
end
return false
end
-- We need to override keymap.on_key_released to detect that all the modifier
-- keys were released while in "hold" mode, to accept the current selection.
local old_keymap_on_key_released = keymap.on_key_released
function keymap.on_key_released(k)
-- Check if hold_mode has been triggered erroneously
if hold_mode and not in_switcher then
hold_mode = false
core.warn("Something went wrong with the tab_switcher plugin. " ..
"Please open an issue about it in the plugins repository on Github.")
end
local was_pressed = any_true(keymap.modkeys)
old_keymap_on_key_released(k)
local still_pressed = any_true(keymap.modkeys)
if hold_mode and was_pressed and not still_pressed then
hold_mode = false
command.perform("command:submit")
end
end
local order_counter = 0
local core_set_active_view = core.set_active_view
function core.set_active_view(view)
nodes_visit_order[view] = order_counter
order_counter = order_counter + 1
return core_set_active_view(view)
end
local tab_switcher = {}
---@class tab_switcher.tab_item
---@field text string The tab name
---@field view core.view
---Returns the list of DocView tabs under a specific node tree.
---@param base_node core.node Where to start the search from
---@return tab_switcher.tab_item[]
function tab_switcher.get_tab_list(base_node)
local raw_list = base_node:get_children()
local list = {}
local mt = {
-- fuzzy_match uses tostring to get the text to compare
__tostring = function(i) return i.text end
}
for _,v in pairs(raw_list) do
if v:is(DocView) then
table.insert(list, setmetatable({
text = v:get_name(),
view = v
}, mt))
end
end
table.sort(list, function(a, b)
return (nodes_visit_order[a.view] or -1) > (nodes_visit_order[b.view] or -1)
end)
return list
end
local function set_active_view(view)
local n = core.root_view.root_node:get_node_for_view(view)
if n then n:set_active_view(view) end
end
---@param label string
---@param items tab_switcher.tab_item[]
local function ask_selection(label, items)
in_switcher = true
core.command_view:enter(label, {
submit = function(_, item)
in_switcher = false
set_active_view(item.view)
end,
suggest = function(text)
if #text > 1 then
return common.fuzzy_match(items, text, true)
else
return items
end
end,
validate = function(_, item)
return item
end,
cancel = function()
in_switcher = false
end,
})
end
command.add(function(items)
items = items or tab_switcher.get_tab_list(core.root_view.root_node)
return #items > 0, items
end, {
["tab-switcher:tab-list"] = function(items)
ask_selection("Switch to tab", items)
end,
["tab-switcher:switch-to-last-tab"] = function(items)
command.perform("tab-switcher:tab-list", items)
command.perform("tab-switcher:previous-tab")
end,
})
command.add(function(items)
items = items or tab_switcher.get_tab_list(core.root_view:get_active_node())
return #items > 0, items
end, {
["tab-switcher:tab-list-current-split"] = function(items)
ask_selection("Switch to tab in current split", items)
end,
["tab-switcher:switch-to-last-tab-in-current-split"] = function(items)
command.perform("tab-switcher:tab-list-current-split", items)
command.perform("tab-switcher:previous-tab")
end,
})
command.add(function() return in_switcher end, {
["tab-switcher:next-tab"] = function()
hold_mode = true
command.perform("command:select-next")
end,
["tab-switcher:previous-tab"] = function()
hold_mode = true
command.perform("command:select-previous")
end,
})
keymap.add({
["alt+p"] = { "tab-switcher:previous-tab", "tab-switcher:tab-list" },
["ctrl+alt+p"] = { "tab-switcher:previous-tab", "tab-switcher:switch-to-last-tab" },
["alt+shift+p"] = { "tab-switcher:next-tab", "tab-switcher:tab-list-current-split" },
["ctrl+alt+shift+p"] = { "tab-switcher:next-tab", "tab-switcher:switch-to-last-tab-in-current-split" },
})
return tab_switcher
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