lite-xl/data/plugins/treeview.lua

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local core = require "core"
local common = require "core.common"
local command = require "core.command"
local config = require "core.config"
local keymap = require "core.keymap"
local style = require "core.style"
local View = require "core.view"
local default_treeview_size = 200 * SCALE
local tooltip_offset = style.font:get_height("A")
local tooltip_border = 1
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local tooltip_delay = 0.5
local tooltip_alpha = 255
local tooltip_alpha_rate = 1
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local function get_depth(filename)
local n = 1
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for sep in filename:gmatch("[\\/]") do
n = n + 1
end
return n
end
local function replace_alpha(color, alpha)
local r, g, b = table.unpack(color)
return { r, g, b, alpha }
end
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local TreeView = View:extend()
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function TreeView:new()
TreeView.super.new(self)
self.scrollable = true
self.visible = true
self.init_size = true
self.target_size = default_treeview_size
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self.cache = {}
self.last = {}
self.tooltip = { x = 0, y = 0, begin = 0, alpha = 0 }
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end
function TreeView:set_target_size(axis, value)
if axis == "x" then
self.target_size = value
return true
end
end
function TreeView:get_cached(item, dirname)
local dir_cache = self.cache[dirname]
if not dir_cache then
dir_cache = {}
self.cache[dirname] = dir_cache
end
-- to discriminate top directories from regular files or subdirectories
-- we add ':' at the end of the top directories' filename. it will be
-- used only to identify the entry into the cache.
local cache_name = item.filename .. (item.topdir and ":" or "")
local t = dir_cache[cache_name]
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if not t then
t = {}
local basename = common.basename(item.filename)
if item.topdir then
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t.filename = basename
t.expanded = true
t.depth = 0
t.abs_filename = dirname
else
t.filename = item.filename
t.depth = get_depth(item.filename)
t.abs_filename = dirname .. PATHSEP .. item.filename
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end
t.name = basename
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t.type = item.type
dir_cache[cache_name] = t
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end
return t
end
function TreeView:get_name()
return "Project"
end
function TreeView:get_item_height()
return style.font:get_height() + style.padding.y
end
function TreeView:check_cache()
-- invalidate cache's skip values if project_files has changed
for i = 1, #core.project_directories do
local dir = core.project_directories[i]
local last_files = self.last[dir.name]
if not last_files then
self.last[dir.name] = dir.files
else
if dir.files ~= last_files then
for _, v in pairs(self.cache[dir.name]) do
v.skip = nil
end
self.last[dir.name] = dir.files
end
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end
end
end
function TreeView:each_item()
return coroutine.wrap(function()
self:check_cache()
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local count_lines = 0
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local ox, oy = self:get_content_offset()
local y = oy + style.padding.y
local w = self.size.x
local h = self:get_item_height()
for k = 1, #core.project_directories do
local dir = core.project_directories[k]
local dir_cached = self:get_cached(dir.item, dir.name)
coroutine.yield(dir_cached, ox, y, w, h)
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count_lines = count_lines + 1
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y = y + h
local i = 1
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while i <= #dir.files and dir_cached.expanded do
local item = dir.files[i]
local cached = self:get_cached(item, dir.name)
coroutine.yield(cached, ox, y, w, h)
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count_lines = count_lines + 1
y = y + h
i = i + 1
if not cached.expanded then
if cached.skip then
i = cached.skip
else
local depth = cached.depth
while i <= #dir.files do
if get_depth(dir.files[i].filename) <= depth then break end
i = i + 1
end
cached.skip = i
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end
end
end -- while files
end -- for directories
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self.count_lines = count_lines
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end)
end
function TreeView:get_text_bounding_box(item, x, y, w, h)
local icon_width = style.icon_font:get_width("D")
local xoffset = item.depth * style.padding.x + style.padding.x + icon_width
x = x + xoffset
w = style.font:get_width(item.name) + 2 * style.padding.x
return x, y, w, h
end
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function TreeView:on_mouse_moved(px, py, ...)
TreeView.super.on_mouse_moved(self, px, py, ...)
if self.dragging_scrollbar then return end
local item_changed, tooltip_changed
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for item, x,y,w,h in self:each_item() do
if px > x and py > y and px <= x + w and py <= y + h then
item_changed = true
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self.hovered_item = item
x,y,w,h = self:get_text_bounding_box(item, x,y,w,h)
if px > x and py > y and px <= x + w and py <= y + h then
tooltip_changed = true
self.tooltip.x, self.tooltip.y = px, py
self.tooltip.begin = system.get_time()
end
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break
end
end
if not item_changed then self.hovered_item = nil end
if not tooltip_changed then self.tooltip.x, self.tooltip.y = nil, nil end
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end
local function create_directory_in(item)
local path = item.abs_filename
core.command_view:enter("Create directory in " .. path, function(text)
local dirname = path .. PATHSEP .. text
local success, err = system.mkdir(dirname)
if not success then
core.error("cannot create directory %q: %s", dirname, err)
end
item.expanded = true
core.reschedule_project_scan()
end)
end
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function TreeView:on_mouse_pressed(button, x, y, clicks)
local caught = TreeView.super.on_mouse_pressed(self, button, x, y, clicks)
if caught then
return
end
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if not self.hovered_item then
return
elseif self.hovered_item.type == "dir" then
if keymap.modkeys["ctrl"] and button == "left" then
create_directory_in(self.hovered_item)
else
self.hovered_item.expanded = not self.hovered_item.expanded
end
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else
core.try(function()
local doc_filename = common.relative_path(core.project_dir, self.hovered_item.abs_filename)
core.root_view:open_doc(core.open_doc(doc_filename))
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end)
end
end
function TreeView:update()
-- update width
local dest = self.visible and self.target_size or 0
if self.init_size then
self.size.x = dest
self.init_size = false
else
self:move_towards(self.size, "x", dest)
end
local duration = system.get_time() - self.tooltip.begin
if self.hovered_item and self.tooltip.x and duration > tooltip_delay then
self:move_towards(self.tooltip, "alpha", tooltip_alpha, tooltip_alpha_rate)
else
self.tooltip.alpha = 0
end
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TreeView.super.update(self)
end
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function TreeView:get_scrollable_size()
return self.count_lines and self:get_item_height() * (self.count_lines + 1) or math.huge
end
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function TreeView:draw_tooltip()
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local text = common.home_encode(self.hovered_item.abs_filename)
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local w, h = style.font:get_width(text), style.font:get_height(text)
local x, y = self.tooltip.x + tooltip_offset, self.tooltip.y + tooltip_offset
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w, h = w + style.padding.x, h + style.padding.y
if x + w > core.root_view.root_node.size.x then -- check if we can span right
x = x - w -- span left instead
end
local bx, by = x - tooltip_border, y - tooltip_border
local bw, bh = w + 2 * tooltip_border, h + 2 * tooltip_border
renderer.draw_rect(bx, by, bw, bh, replace_alpha(style.text, self.tooltip.alpha))
renderer.draw_rect(x, y, w, h, replace_alpha(style.background2, self.tooltip.alpha))
common.draw_text(style.font, replace_alpha(style.text, self.tooltip.alpha), text, "center", x, y, w, h)
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end
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function TreeView:draw()
self:draw_background(style.background2)
local icon_width = style.icon_font:get_width("D")
local spacing = style.icon_font:get_width("f") / 2
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local doc = core.active_view.doc
local active_filename = doc and system.absolute_path(doc.filename or "")
for item, x,y,w,h in self:each_item() do
local color = style.text
-- highlight active_view doc
if item.abs_filename == active_filename then
color = style.accent
end
-- hovered item background
if item == self.hovered_item then
renderer.draw_rect(x, y, w, h, style.line_highlight)
color = style.accent
end
-- icons
x = x + item.depth * style.padding.x + style.padding.x
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if item.type == "dir" then
local icon1 = item.expanded and "-" or "+"
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local icon2 = item.expanded and "D" or "d"
common.draw_text(style.icon_font, color, icon1, nil, x, y, 0, h)
x = x + style.padding.x
common.draw_text(style.icon_font, color, icon2, nil, x, y, 0, h)
x = x + icon_width
else
x = x + style.padding.x
common.draw_text(style.icon_font, color, "f", nil, x, y, 0, h)
x = x + icon_width
end
-- text
x = x + spacing
x = common.draw_text(style.font, color, item.name, nil, x, y, 0, h)
end
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self:draw_scrollbar()
if self.hovered_item and self.tooltip.alpha > 0 then
core.root_view:defer_draw(self.draw_tooltip, self)
end
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end
-- init
local view = TreeView()
local node = core.root_view:get_active_node()
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local treeview_node = node:split("left", view, {x = true}, true)
-- The toolbarview plugin is special because it is plugged inside
-- a treeview pane which is itelf provided in a plugin.
-- We therefore break the usual plugin's logic that would require each
-- plugin to be independent of each other. In addition it is not the
-- plugin module that plug itself in the active node but it is plugged here
-- in the treeview node.
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local toolbar_plugin, ToolbarView = core.try(require, "plugins.toolbarview")
if config.toolbarview ~= false and toolbar_plugin then
local toolbar_view = ToolbarView()
treeview_node:split("down", toolbar_view, {y = true})
local min_toolbar_width = toolbar_view:get_min_width()
view:set_target_size("x", math.max(default_treeview_size, min_toolbar_width))
command.add(nil, {
["toolbar:toggle"] = function()
toolbar_view:toggle_visible()
end,
})
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end
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-- register commands and keymap
command.add(nil, {
["treeview:toggle"] = function()
view.visible = not view.visible
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end,
})
keymap.add { ["ctrl+\\"] = "treeview:toggle" }