lite-xl/data/core/commandview.lua

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local core = require "core"
local common = require "core.common"
local style = require "core.style"
local Doc = require "core.doc"
local DocView = require "core.docview"
local View = require "core.view"
local SingleLineDoc = Doc:extend()
function SingleLineDoc:insert(line, col, text)
SingleLineDoc.super.insert(self, line, col, text:gsub("\n", ""))
end
local CommandView = DocView:extend()
CommandView.context = "application"
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local max_suggestions = 10
local noop = function() end
local default_state = {
submit = noop,
suggest = noop,
cancel = noop,
validate = function() return true end,
typeahead = true,
wrap = true,
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}
function CommandView:new()
CommandView.super.new(self, SingleLineDoc())
self.suggestion_idx = 1
self.suggestions = {}
self.suggestions_height = 0
self.show_suggestions = true
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self.last_change_id = 0
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self.last_text = ""
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self.gutter_width = 0
self.gutter_text_brightness = 0
self.selection_offset = 0
self.state = default_state
self.font = "font"
self.size.y = 0
self.label = ""
end
function CommandView:set_hidden_suggestions()
self.show_suggestions = false
end
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function CommandView:get_name()
return View.get_name(self)
end
function CommandView:get_line_screen_position(line, col)
local x = CommandView.super.get_line_screen_position(self, 1, col)
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local _, y = self:get_content_offset()
local lh = self:get_line_height()
return x, y + (self.size.y - lh) / 2
end
function CommandView:get_scrollable_size()
return 0
end
function CommandView:scroll_to_make_visible()
-- no-op function to disable this functionality
end
function CommandView:get_text()
return self.doc:get_text(1, 1, 1, math.huge)
end
function CommandView:set_text(text, select)
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self.last_text = text
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self.doc:remove(1, 1, math.huge, math.huge)
self.doc:text_input(text)
if select then
self.doc:set_selection(math.huge, math.huge, 1, 1)
end
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end
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function CommandView:move_suggestion_idx(dir)
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local function overflow_suggestion_idx(n, count)
if self.state.wrap then
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return (n - 1) % count + 1
else
return common.clamp(n, 1, count)
end
end
if self.show_suggestions then
local n = self.suggestion_idx + dir
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self.suggestion_idx = overflow_suggestion_idx(n, #self.suggestions)
self:complete()
self.last_change_id = self.doc:get_change_id()
else
local current_suggestion = #self.suggestions > 0 and self.suggestions[self.suggestion_idx].text
local text = self:get_text()
if text == current_suggestion then
local n = self.suggestion_idx + dir
if n == 0 and self.save_suggestion then
self:set_text(self.save_suggestion)
else
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self.suggestion_idx = overflow_suggestion_idx(n, #self.suggestions)
self:complete()
end
else
self.save_suggestion = text
self:complete()
end
self.last_change_id = self.doc:get_change_id()
self.state.suggest(self:get_text())
end
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end
function CommandView:complete()
if #self.suggestions > 0 then
self:set_text(self.suggestions[self.suggestion_idx].text)
end
end
function CommandView:submit()
local suggestion = self.suggestions[self.suggestion_idx]
local text = self:get_text()
if self.state.validate(text) then
local submit = self.state.submit
self:exit(true)
submit(text, suggestion)
end
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end
function CommandView:enter(text, ...)
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if self.state ~= default_state then
return
end
local options = select(1, ...)
if type(options) ~= "table" then
core.info("Warning: deprecated CommandView:enter usage")
local submit, suggest, cancel, validate = ...
options = {
submit = submit,
suggest = suggest,
cancel = cancel,
validate = validate,
}
end
self.state = common.merge(default_state, options)
core.set_active_view(self)
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self:update_suggestions()
self.gutter_text_brightness = 100
self.label = text .. ": "
end
function CommandView:exit(submitted, inexplicit)
if core.active_view == self then
core.set_active_view(core.last_active_view)
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end
local cancel = self.state.cancel
self.state = default_state
self.doc:reset()
self.suggestions = {}
if not submitted then cancel(not inexplicit) end
self.show_suggestions = true
self.save_suggestion = nil
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self.last_text = ""
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end
function CommandView:get_gutter_width()
return self.gutter_width
end
function CommandView:get_suggestion_line_height()
return self:get_font():get_height() + style.padding.y
end
function CommandView:update_suggestions()
local t = self.state.suggest(self:get_text()) or {}
local res = {}
for i, item in ipairs(t) do
if type(item) == "string" then
item = { text = item }
end
res[i] = item
end
self.suggestions = res
self.suggestion_idx = 1
end
function CommandView:update()
CommandView.super.update(self)
if core.active_view ~= self and self.state ~= default_state then
self:exit(false, true)
end
-- update suggestions if text has changed
if self.last_change_id ~= self.doc:get_change_id() then
self:update_suggestions()
if self.state.typeahead and self.suggestions[self.suggestion_idx] then
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local current_text = self:get_text()
local suggested_text = self.suggestions[self.suggestion_idx].text or ""
if #self.last_text < #current_text and
string.find(suggested_text, current_text, 1, true) == 1 then
self:set_text(suggested_text)
self.doc:set_selection(1, #current_text + 1, 1, math.huge)
end
self.last_text = current_text
end
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self.last_change_id = self.doc:get_change_id()
end
-- update gutter text color brightness
self:move_towards("gutter_text_brightness", 0, 0.1, "commandview")
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-- update gutter width
local dest = self:get_font():get_width(self.label) + style.padding.x
if self.size.y <= 0 then
self.gutter_width = dest
else
self:move_towards("gutter_width", dest, nil, "commandview")
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end
-- update suggestions box height
local lh = self:get_suggestion_line_height()
local dest = self.show_suggestions and math.min(#self.suggestions, max_suggestions) * lh or 0
self:move_towards("suggestions_height", dest, nil, "commandview")
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-- update suggestion cursor offset
local dest = math.min(self.suggestion_idx, max_suggestions) * self:get_suggestion_line_height()
self:move_towards("selection_offset", dest, nil, "commandview")
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-- update size based on whether this is the active_view
local dest = 0
if self == core.active_view then
dest = style.font:get_height() + style.padding.y * 2
end
self:move_towards(self.size, "y", dest, nil, "commandview")
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end
function CommandView:draw_line_highlight()
-- no-op function to disable this functionality
end
function CommandView:draw_line_gutter(idx, x, y)
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local yoffset = self:get_line_text_y_offset()
local pos = self.position
local color = common.lerp(style.text, style.accent, self.gutter_text_brightness / 100)
core.push_clip_rect(pos.x, pos.y, self:get_gutter_width(), self.size.y)
x = x + style.padding.x
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renderer.draw_text(self:get_font(), self.label, x, y + yoffset, color)
core.pop_clip_rect()
return self:get_line_height()
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end
local function draw_suggestions_box(self)
local lh = self:get_suggestion_line_height()
local dh = style.divider_size
local x, _ = self:get_line_screen_position()
local h = math.ceil(self.suggestions_height)
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local rx, ry, rw, rh = self.position.x, self.position.y - h - dh, self.size.x, h
-- draw suggestions background
if #self.suggestions > 0 then
renderer.draw_rect(rx, ry, rw, rh, style.background3)
renderer.draw_rect(rx, ry - dh, rw, dh, style.divider)
local y = self.position.y - self.selection_offset - dh
renderer.draw_rect(rx, y, rw, lh, style.line_highlight)
end
-- draw suggestion text
local suggestion_offset = math.max(self.suggestion_idx - max_suggestions, 0)
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core.push_clip_rect(rx, ry, rw, rh)
local i = 1 + suggestion_offset
while i <= #self.suggestions do
local item = self.suggestions[i]
local color = (i == self.suggestion_idx) and style.accent or style.text
local y = self.position.y - (i - suggestion_offset) * lh - dh
common.draw_text(self:get_font(), color, item.text, nil, x, y, 0, lh)
if item.info then
local w = self.size.x - x - style.padding.x
common.draw_text(self:get_font(), style.dim, item.info, "right", x, y, w, lh)
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end
i = i + 1
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end
core.pop_clip_rect()
end
function CommandView:draw()
CommandView.super.draw(self)
if self.show_suggestions then
core.root_view:defer_draw(draw_suggestions_box, self)
end
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end
return CommandView