732 lines
20 KiB
Lua
732 lines
20 KiB
Lua
local core = require "core"
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local common = require "core.common"
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local style = require "core.style"
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local keymap = require "core.keymap"
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local Object = require "core.object"
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local View = require "core.view"
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local CommandView = require "core.commandview"
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local NagView = require "core.nagview"
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local DocView = require "core.docview"
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local EmptyView = View:extend()
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local function draw_text(x, y, color)
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local th = style.big_font:get_height()
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local dh = 2 * th + style.padding.y * 2
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local x1, y1 = x, y + (dh - th) / 2
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x = renderer.draw_text(style.big_font, "Lite XL", x1, y1, color)
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renderer.draw_text(style.font, "version " .. VERSION, x1, y1 + th, color)
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x = x + style.padding.x
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renderer.draw_rect(x, y, math.ceil(1 * SCALE), dh, color)
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local lines = {
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{ fmt = "%s to run a command", cmd = "core:find-command" },
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{ fmt = "%s to open a file from the project", cmd = "core:find-file" },
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{ fmt = "%s to change project folder", cmd = "core:change-project-folder" },
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{ fmt = "%s to open a project folder", cmd = "core:open-project-folder" },
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}
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th = style.font:get_height()
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y = y + (dh - (th + style.padding.y) * #lines) / 2
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local w = 0
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for _, line in ipairs(lines) do
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local text = string.format(line.fmt, keymap.get_binding(line.cmd))
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w = math.max(w, renderer.draw_text(style.font, text, x + style.padding.x, y, color))
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y = y + th + style.padding.y
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end
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return w, dh
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end
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function EmptyView:draw()
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self:draw_background(style.background)
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local w, h = draw_text(0, 0, { 0, 0, 0, 0 })
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local x = self.position.x + math.max(style.padding.x, (self.size.x - w) / 2)
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local y = self.position.y + (self.size.y - h) / 2
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draw_text(x, y, style.dim)
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end
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local Node = Object:extend()
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function Node:new(type)
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self.type = type or "leaf"
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self.position = { x = 0, y = 0 }
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self.size = { x = 0, y = 0 }
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self.views = {}
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self.divider = 0.5
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if self.type == "leaf" then
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self:add_view(EmptyView())
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end
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self.hovered_close = 0
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end
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function Node:propagate(fn, ...)
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self.a[fn](self.a, ...)
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self.b[fn](self.b, ...)
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end
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function Node:on_mouse_moved(x, y, ...)
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self.hovered_tab = self:get_tab_overlapping_point(x, y)
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if self.type == "leaf" then
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self:tab_mouse_moved(x, y)
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self.active_view:on_mouse_moved(x, y, ...)
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else
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self:propagate("on_mouse_moved", x, y, ...)
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end
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end
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function Node:on_mouse_released(...)
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if self.type == "leaf" then
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self.active_view:on_mouse_released(...)
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else
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self:propagate("on_mouse_released", ...)
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end
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end
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function Node:consume(node)
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for k, _ in pairs(self) do self[k] = nil end
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for k, v in pairs(node) do self[k] = v end
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end
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local type_map = { up="vsplit", down="vsplit", left="hsplit", right="hsplit" }
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-- The "locked" argument below should be in the form {x = <boolean>, y = <boolean>}
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-- and it indicates if the node want to have a fixed size along the axis where the
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-- boolean is true. If not it will be expanded to take all the available space.
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-- The "resizable" flag indicates if, along the "locked" axis the node can be resized
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-- by the user. If the node is marked as resizable their view should provide a
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-- set_target_size method.
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function Node:split(dir, view, locked, resizable)
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assert(self.type == "leaf", "Tried to split non-leaf node")
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local node_type = assert(type_map[dir], "Invalid direction")
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local last_active = core.active_view
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local child = Node()
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child:consume(self)
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self:consume(Node(node_type))
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self.a = child
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self.b = Node()
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if view then self.b:add_view(view) end
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if locked then
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assert(type(locked) == 'table')
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self.b.locked = locked
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self.b.resizable = resizable or false
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core.set_active_view(last_active)
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end
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if dir == "up" or dir == "left" then
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self.a, self.b = self.b, self.a
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return self.a
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end
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return self.b
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end
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function Node:close_view(root, view)
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local new_active_view = view == self.active_view
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local do_close = function()
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if #self.views > 1 then
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local idx = self:get_view_idx(view)
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table.remove(self.views, idx)
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if new_active_view then
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self:set_active_view(self.views[idx] or self.views[#self.views])
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end
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else
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local parent = self:get_parent_node(root)
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local is_a = (parent.a == self)
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local other = parent[is_a and "b" or "a"]
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if other:get_locked_size() then
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self.views = {}
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self:add_view(EmptyView())
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else
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parent:consume(other)
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local p = parent
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while p.type ~= "leaf" do
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p = p[is_a and "a" or "b"]
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end
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p:set_active_view(p.active_view)
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if self.is_primary_node then
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p.is_primary_node = true
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end
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end
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end
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core.last_active_view = nil
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end
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view:try_close(do_close)
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end
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function Node:close_active_view(root)
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self:close_view(root, self.active_view)
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end
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function Node:add_view(view)
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assert(self.type == "leaf", "Tried to add view to non-leaf node")
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assert(not self.locked, "Tried to add view to locked node")
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if self.views[1] and self.views[1]:is(EmptyView) then
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table.remove(self.views)
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end
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table.insert(self.views, view)
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self:set_active_view(view)
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end
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function Node:set_active_view(view)
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assert(self.type == "leaf", "Tried to set active view on non-leaf node")
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self.active_view = view
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core.set_active_view(view)
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end
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function Node:get_view_idx(view)
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for i, v in ipairs(self.views) do
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if v == view then return i end
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end
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end
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function Node:get_node_for_view(view)
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for _, v in ipairs(self.views) do
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if v == view then return self end
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end
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if self.type ~= "leaf" then
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return self.a:get_node_for_view(view) or self.b:get_node_for_view(view)
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end
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end
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function Node:get_parent_node(root)
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if root.a == self or root.b == self then
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return root
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elseif root.type ~= "leaf" then
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return self:get_parent_node(root.a) or self:get_parent_node(root.b)
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end
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end
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function Node:get_children(t)
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t = t or {}
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for _, view in ipairs(self.views) do
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table.insert(t, view)
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end
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if self.a then self.a:get_children(t) end
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if self.b then self.b:get_children(t) end
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return t
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end
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function Node:get_divider_overlapping_point(px, py)
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if self.type ~= "leaf" then
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local p = 6
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local x, y, w, h = self:get_divider_rect()
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x, y = x - p, y - p
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w, h = w + p * 2, h + p * 2
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if px > x and py > y and px < x + w and py < y + h then
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return self
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end
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return self.a:get_divider_overlapping_point(px, py)
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or self.b:get_divider_overlapping_point(px, py)
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end
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end
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function Node:get_tab_overlapping_point(px, py)
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if #self.views == 1 then return nil end
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local x, y, w, h = self:get_tab_rect(1)
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if px >= x and py >= y and px < x + w * #self.views and py < y + h then
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return math.floor((px - x) / w) + 1
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end
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end
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local function close_button_location(x, w)
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local cw = style.icon_font:get_width("C")
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local pad = style.padding.y
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return x + w - pad - cw, cw, pad
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end
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function Node:tab_mouse_moved(px, py)
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local tab_index = self:get_tab_overlapping_point(px, py)
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if tab_index then
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local x, y, w, h = self:get_tab_rect(tab_index)
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local cx, cw = close_button_location(x, w)
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if px >= cx and px < cx + cw and py >= y and py < y + h then
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self.hovered_close = tab_index
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return
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end
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end
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self.hovered_close = 0
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end
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function Node:get_child_overlapping_point(x, y)
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local child
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if self.type == "leaf" then
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return self
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elseif self.type == "hsplit" then
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child = (x < self.b.position.x) and self.a or self.b
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elseif self.type == "vsplit" then
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child = (y < self.b.position.y) and self.a or self.b
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end
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return child:get_child_overlapping_point(x, y)
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end
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function Node:get_tab_rect(idx)
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local tw = math.min(style.tab_width, math.ceil(self.size.x / #self.views))
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local h = style.font:get_height() + style.padding.y * 2
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return self.position.x + (idx-1) * tw, self.position.y, tw, h
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end
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function Node:get_divider_rect()
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local x, y = self.position.x, self.position.y
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if self.type == "hsplit" then
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return x + self.a.size.x, y, style.divider_size, self.size.y
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elseif self.type == "vsplit" then
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return x, y + self.a.size.y, self.size.x, style.divider_size
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end
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end
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-- Return two values for x and y axis and each of them is either falsy or a number.
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-- A falsy value indicate no fixed size along the corresponding direction.
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function Node:get_locked_size()
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if self.type == "leaf" then
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if self.locked then
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local size = self.active_view.size
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-- The values below should be either a falsy value or a number
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local sx = (self.locked and self.locked.x) and size.x
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local sy = (self.locked and self.locked.y) and size.y
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return sx, sy
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end
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else
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local x1, y1 = self.a:get_locked_size()
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local x2, y2 = self.b:get_locked_size()
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-- The values below should be either a falsy value or a number
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local sx, sy
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if self.type == 'hsplit' then
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if x1 and x2 then
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local dsx = (x1 < 1 or x2 < 1) and 0 or style.divider_size
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sx = x1 + x2 + dsx
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end
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sy = y1 or y2
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else
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if y1 and y2 then
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local dsy = (y1 < 1 or y2 < 1) and 0 or style.divider_size
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sy = y1 + y2 + dsy
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end
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sx = x1 or x2
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end
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return sx, sy
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end
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end
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local function copy_position_and_size(dst, src)
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dst.position.x, dst.position.y = src.position.x, src.position.y
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dst.size.x, dst.size.y = src.size.x, src.size.y
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end
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-- calculating the sizes is the same for hsplits and vsplits, except the x/y
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-- axis are swapped; this function lets us use the same code for both
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local function calc_split_sizes(self, x, y, x1, x2, y1, y2)
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local n
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local ds = ((x1 and x1 < 1) or (x2 and x2 < 1)) and 0 or style.divider_size
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if x1 then
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n = x1 + ds
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elseif x2 then
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n = self.size[x] - x2
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else
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n = math.floor(self.size[x] * self.divider)
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end
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self.a.position[x] = self.position[x]
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self.a.position[y] = self.position[y]
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self.a.size[x] = n - ds
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self.a.size[y] = self.size[y]
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self.b.position[x] = self.position[x] + n
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self.b.position[y] = self.position[y]
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self.b.size[x] = self.size[x] - n
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self.b.size[y] = self.size[y]
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end
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function Node:update_layout()
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if self.type == "leaf" then
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local av = self.active_view
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if #self.views > 1 then
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local _, _, _, th = self:get_tab_rect(1)
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av.position.x, av.position.y = self.position.x, self.position.y + th
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av.size.x, av.size.y = self.size.x, self.size.y - th
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else
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copy_position_and_size(av, self)
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end
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else
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local x1, y1 = self.a:get_locked_size()
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local x2, y2 = self.b:get_locked_size()
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if self.type == "hsplit" then
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calc_split_sizes(self, "x", "y", x1, x2)
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elseif self.type == "vsplit" then
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calc_split_sizes(self, "y", "x", y1, y2)
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end
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self.a:update_layout()
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self.b:update_layout()
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end
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end
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function Node:update()
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if self.type == "leaf" then
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for _, view in ipairs(self.views) do
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view:update()
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end
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else
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self.a:update()
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self.b:update()
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end
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end
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function Node:draw_tabs()
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local x, y, _, h = self:get_tab_rect(1)
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local ds = style.divider_size
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core.push_clip_rect(x, y, self.size.x, h)
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renderer.draw_rect(x, y, self.size.x, h, style.background2)
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renderer.draw_rect(x, y + h - ds, self.size.x, ds, style.divider)
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for i, view in ipairs(self.views) do
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local x, y, w, h = self:get_tab_rect(i)
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local text = view:get_name()
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local color = style.dim
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local padding_y = style.padding.y
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renderer.draw_rect(x + w, y + padding_y, ds, h - padding_y * 2, style.dim)
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if view == self.active_view then
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color = style.text
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renderer.draw_rect(x, y, w, h, style.background)
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renderer.draw_rect(x + w, y, ds, h, style.divider)
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renderer.draw_rect(x - ds, y, ds, h, style.divider)
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end
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local cx, cw, cspace = close_button_location(x, w)
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local show_close_button = (view == self.active_view or i == self.hovered_tab)
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if show_close_button then
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local close_style = self.hovered_close == i and style.text or style.dim
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common.draw_text(style.icon_font, close_style, "C", nil, cx, y, 0, h)
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end
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if i == self.hovered_tab then
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color = style.text
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end
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local padx = style.padding.x
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core.push_clip_rect(x, y, show_close_button and cx - x - cspace or w - padx, h)
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x, w = x + padx, w - padx * 2
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local align = style.font:get_width(text) > w and "left" or "center"
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common.draw_text(style.font, color, text, align, x, y, w, h)
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core.pop_clip_rect()
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end
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core.pop_clip_rect()
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end
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function Node:draw()
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if self.type == "leaf" then
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if #self.views > 1 then
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self:draw_tabs()
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end
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local pos, size = self.active_view.position, self.active_view.size
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core.push_clip_rect(pos.x, pos.y, size.x + pos.x % 1, size.y + pos.y % 1)
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self.active_view:draw()
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core.pop_clip_rect()
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else
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local x, y, w, h = self:get_divider_rect()
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renderer.draw_rect(x, y, w, h, style.divider)
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self:propagate("draw")
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end
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end
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function Node:is_empty()
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if self.type == "leaf" then
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return #self.views == 0
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else
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return self.a:is_empty() and self.b:is_empty()
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end
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end
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function Node:close_all_docviews()
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if self.type == "leaf" then
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local i = 1
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while i <= #self.views do
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local view = self.views[i]
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if view:is(DocView) and not view:is(CommandView) then
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table.remove(self.views, i)
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else
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i = i + 1
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end
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end
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if #self.views == 0 and self.is_primary_node then
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self:add_view(EmptyView())
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end
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else
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self.a:close_all_docviews()
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self.b:close_all_docviews()
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if self.a:is_empty() then
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self:consume(self.b)
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elseif self.b:is_empty() then
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self:consume(self.a)
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end
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end
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end
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-- Returns true for nodes that accept either "proportional" resizes (based on the
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-- node.divider) or "locked" resizable nodes (along the resize axis).
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function Node:is_resizable(axis)
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if self.type == 'leaf' then
|
|
return not self.locked or not self.locked[axis] or self.resizable
|
|
else
|
|
local a_resizable = self.a:is_resizable(axis)
|
|
local b_resizable = self.b:is_resizable(axis)
|
|
return a_resizable and b_resizable
|
|
end
|
|
end
|
|
|
|
|
|
-- Return true iff it is a locked pane along the rezise axis and is
|
|
-- declared "resizable".
|
|
function Node:is_locked_resizable(axis)
|
|
return self.locked and self.locked[axis] and self.resizable
|
|
end
|
|
|
|
|
|
function Node:resize(axis, value)
|
|
if self.type == 'leaf' then
|
|
-- If it is not locked we don't accept the
|
|
-- resize operation here because for proportional panes the resize is
|
|
-- done using the "divider" value of the parent node.
|
|
if self:is_locked_resizable(axis) then
|
|
return self.active_view:set_target_size(axis, value)
|
|
end
|
|
else
|
|
if self.type == (axis == "x" and "hsplit" or "vsplit") then
|
|
-- we are resizing a node that is splitted along the resize axis
|
|
if self.a:is_locked_resizable(axis) and self.b:is_locked_resizable(axis) then
|
|
local rem_value = value - self.a.size[axis]
|
|
if rem_value >= 0 then
|
|
return self.b.active_view:set_target_size(axis, rem_value)
|
|
else
|
|
self.b.active_view:set_target_size(axis, 0)
|
|
return self.a.active_view:set_target_size(axis, value)
|
|
end
|
|
end
|
|
else
|
|
-- we are resizing a node that is splitted along the axis perpendicular
|
|
-- to the resize axis
|
|
local a_resizable = self.a:is_resizable(axis)
|
|
local b_resizable = self.b:is_resizable(axis)
|
|
if a_resizable and b_resizable then
|
|
self.a:resize(axis, value)
|
|
self.b:resize(axis, value)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
local RootView = View:extend()
|
|
|
|
function RootView:new()
|
|
RootView.super.new(self)
|
|
self.root_node = Node()
|
|
self.deferred_draws = {}
|
|
self.mouse = { x = 0, y = 0 }
|
|
end
|
|
|
|
|
|
function RootView:defer_draw(fn, ...)
|
|
table.insert(self.deferred_draws, 1, { fn = fn, ... })
|
|
end
|
|
|
|
|
|
function RootView:get_active_node()
|
|
return self.root_node:get_node_for_view(core.active_view)
|
|
end
|
|
|
|
|
|
local function get_primary_node(node)
|
|
if node.is_primary_node then
|
|
return node
|
|
end
|
|
if node.type ~= "leaf" then
|
|
return get_primary_node(node.a) or get_primary_node(node.b)
|
|
end
|
|
end
|
|
|
|
|
|
function RootView:get_active_node_default()
|
|
local node = self.root_node:get_node_for_view(core.active_view)
|
|
if node.locked then
|
|
local default_view = self:get_primary_node().views[1]
|
|
assert(default_view, "internal error: cannot find original document node.")
|
|
core.set_active_view(default_view)
|
|
node = self:get_active_node()
|
|
end
|
|
return node
|
|
end
|
|
|
|
|
|
function RootView:get_primary_node()
|
|
return get_primary_node(self.root_node)
|
|
end
|
|
|
|
|
|
function RootView:open_doc(doc)
|
|
local node = self:get_active_node_default()
|
|
for i, view in ipairs(node.views) do
|
|
if view.doc == doc then
|
|
node:set_active_view(node.views[i])
|
|
return view
|
|
end
|
|
end
|
|
local view = DocView(doc)
|
|
node:add_view(view)
|
|
self.root_node:update_layout()
|
|
view:scroll_to_line(view.doc:get_selection(), true, true)
|
|
return view
|
|
end
|
|
|
|
|
|
function RootView:close_all_docviews()
|
|
self.root_node:close_all_docviews()
|
|
end
|
|
|
|
|
|
function RootView:on_mouse_pressed(button, x, y, clicks)
|
|
local div = self.root_node:get_divider_overlapping_point(x, y)
|
|
if div then
|
|
self.dragged_divider = div
|
|
return
|
|
end
|
|
local node = self.root_node:get_child_overlapping_point(x, y)
|
|
local idx = node:get_tab_overlapping_point(x, y)
|
|
if idx then
|
|
if button == "middle" or node.hovered_close == idx then
|
|
node:close_view(self.root_node, node.views[idx])
|
|
else
|
|
self.dragged_node = idx
|
|
node:set_active_view(node.views[idx])
|
|
end
|
|
else
|
|
core.set_active_view(node.active_view)
|
|
node.active_view:on_mouse_pressed(button, x, y, clicks)
|
|
end
|
|
end
|
|
|
|
|
|
function RootView:on_mouse_released(...)
|
|
if self.dragged_divider then
|
|
self.dragged_divider = nil
|
|
end
|
|
if self.dragged_node then
|
|
self.dragged_node = nil
|
|
end
|
|
self.root_node:on_mouse_released(...)
|
|
end
|
|
|
|
|
|
local function resize_child_node(node, axis, value, delta)
|
|
local accept_resize = node.a:resize(axis, value)
|
|
if not accept_resize then
|
|
accept_resize = node.b:resize(axis, node.size[axis] - value)
|
|
end
|
|
if not accept_resize then
|
|
node.divider = node.divider + delta / node.size[axis]
|
|
end
|
|
end
|
|
|
|
|
|
function RootView:on_mouse_moved(x, y, dx, dy)
|
|
if core.active_view == core.nag_view then
|
|
system.set_cursor("arrow")
|
|
core.active_view:on_mouse_moved(x, y, dx, dy)
|
|
return
|
|
end
|
|
|
|
if self.dragged_divider then
|
|
local node = self.dragged_divider
|
|
if node.type == "hsplit" then
|
|
x = common.clamp(x, 0, self.root_node.size.x * 0.95)
|
|
resize_child_node(node, "x", x, dx)
|
|
elseif node.type == "vsplit" then
|
|
y = common.clamp(y, 0, self.root_node.size.y * 0.95)
|
|
resize_child_node(node, "y", y, dy)
|
|
end
|
|
node.divider = common.clamp(node.divider, 0.01, 0.99)
|
|
return
|
|
end
|
|
|
|
self.mouse.x, self.mouse.y = x, y
|
|
self.root_node:on_mouse_moved(x, y, dx, dy)
|
|
|
|
local node = self.root_node:get_child_overlapping_point(x, y)
|
|
local div = self.root_node:get_divider_overlapping_point(x, y)
|
|
local tab_index = node and node:get_tab_overlapping_point(x, y)
|
|
if div then
|
|
local axis = (div.type == "hsplit" and "x" or "y")
|
|
if div.a:is_resizable(axis) and div.b:is_resizable(axis) then
|
|
system.set_cursor(div.type == "hsplit" and "sizeh" or "sizev")
|
|
end
|
|
elseif tab_index then
|
|
system.set_cursor("arrow")
|
|
if self.dragged_node and self.dragged_node ~= tab_index then
|
|
local tab = node.views[self.dragged_node]
|
|
table.remove(node.views, self.dragged_node)
|
|
table.insert(node.views, tab_index, tab)
|
|
self.dragged_node = tab_index
|
|
end
|
|
else
|
|
system.set_cursor(node.active_view.cursor)
|
|
end
|
|
end
|
|
|
|
|
|
function RootView:on_mouse_wheel(...)
|
|
local x, y = self.mouse.x, self.mouse.y
|
|
local node = self.root_node:get_child_overlapping_point(x, y)
|
|
node.active_view:on_mouse_wheel(...)
|
|
end
|
|
|
|
|
|
function RootView:on_text_input(...)
|
|
core.active_view:on_text_input(...)
|
|
end
|
|
|
|
|
|
function RootView:on_focus_lost(...)
|
|
-- We force a redraw so documents can redraw without the cursor.
|
|
core.redraw = true
|
|
end
|
|
|
|
function RootView:update()
|
|
copy_position_and_size(self.root_node, self)
|
|
self.root_node:update()
|
|
self.root_node:update_layout()
|
|
end
|
|
|
|
|
|
function RootView:draw()
|
|
self.root_node:draw()
|
|
while #self.deferred_draws > 0 do
|
|
local t = table.remove(self.deferred_draws)
|
|
t.fn(table.unpack(t))
|
|
end
|
|
end
|
|
|
|
|
|
return RootView
|