470 lines
14 KiB
Lua
470 lines
14 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 Node = require "core.node"
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local View = require "core.view"
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local DocView = require "core.docview"
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---@class core.rootview : core.view
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---@field super core.view
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---@field root_node core.node
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---@field mouse core.view.position
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local RootView = View:extend()
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function RootView:new()
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RootView.super.new(self)
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self.root_node = Node()
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self.deferred_draws = {}
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self.mouse = { x = 0, y = 0 }
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self.drag_overlay = { x = 0, y = 0, w = 0, h = 0, visible = false, opacity = 0,
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base_color = style.drag_overlay,
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color = { table.unpack(style.drag_overlay) } }
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self.drag_overlay.to = { x = 0, y = 0, w = 0, h = 0 }
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self.drag_overlay_tab = { x = 0, y = 0, w = 0, h = 0, visible = false, opacity = 0,
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base_color = style.drag_overlay_tab,
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color = { table.unpack(style.drag_overlay_tab) } }
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self.drag_overlay_tab.to = { x = 0, y = 0, w = 0, h = 0 }
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end
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function RootView:defer_draw(fn, ...)
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table.insert(self.deferred_draws, 1, { fn = fn, ... })
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end
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---@return core.node
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function RootView:get_active_node()
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local node = self.root_node:get_node_for_view(core.active_view)
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if not node then node = self:get_primary_node() end
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return node
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end
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---@return core.node
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local function get_primary_node(node)
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if node.is_primary_node then
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return node
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end
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if node.type ~= "leaf" then
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return get_primary_node(node.a) or get_primary_node(node.b)
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end
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end
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---@return core.node
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function RootView:get_active_node_default()
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local node = self.root_node:get_node_for_view(core.active_view)
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if not node then node = self:get_primary_node() end
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if node.locked then
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local default_view = self:get_primary_node().views[1]
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assert(default_view, "internal error: cannot find original document node.")
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core.set_active_view(default_view)
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node = self:get_active_node()
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end
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return node
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end
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---@return core.node
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function RootView:get_primary_node()
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return get_primary_node(self.root_node)
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end
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---@param node core.node
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---@return core.node
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local function select_next_primary_node(node)
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if node.is_primary_node then return end
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if node.type ~= "leaf" then
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return select_next_primary_node(node.a) or select_next_primary_node(node.b)
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else
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local lx, ly = node:get_locked_size()
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if not lx and not ly then
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return node
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end
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end
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end
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---@return core.node
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function RootView:select_next_primary_node()
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return select_next_primary_node(self.root_node)
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end
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---@param doc core.doc
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---@return core.docview
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function RootView:open_doc(doc)
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local node = self:get_active_node_default()
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for i, view in ipairs(node.views) do
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if view.doc == doc then
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node:set_active_view(node.views[i])
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return view
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end
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end
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local view = DocView(doc)
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node:add_view(view)
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self.root_node:update_layout()
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view:scroll_to_line(view.doc:get_selection(), true, true)
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return view
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end
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---@param keep_active boolean
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function RootView:close_all_docviews(keep_active)
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self.root_node:close_all_docviews(keep_active)
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end
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---Function to intercept mouse pressed events on the active view.
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---Do nothing by default.
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---@param button core.view.mousebutton
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---@param x number
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---@param y number
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---@param clicks integer
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function RootView.on_view_mouse_pressed(button, x, y, clicks)
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end
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---@param button core.view.mousebutton
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---@param x number
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---@param y number
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---@param clicks integer
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---@return boolean
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function RootView:on_mouse_pressed(button, x, y, clicks)
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local div = self.root_node:get_divider_overlapping_point(x, y)
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local node = self.root_node:get_child_overlapping_point(x, y)
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if div and (node and not node.active_view:scrollbar_overlaps_point(x, y)) then
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self.dragged_divider = div
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return true
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end
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if node.hovered_scroll_button > 0 then
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node:scroll_tabs(node.hovered_scroll_button)
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return true
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end
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local idx = node:get_tab_overlapping_point(x, y)
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if idx then
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if button == "middle" or node.hovered_close == idx then
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node:close_view(self.root_node, node.views[idx])
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return true
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else
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if button == "left" then
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self.dragged_node = { node = node, idx = idx, dragging = false, drag_start_x = x, drag_start_y = y}
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end
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node:set_active_view(node.views[idx])
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return true
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end
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elseif not self.dragged_node then -- avoid sending on_mouse_pressed events when dragging tabs
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core.set_active_view(node.active_view)
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return self.on_view_mouse_pressed(button, x, y, clicks) or node.active_view:on_mouse_pressed(button, x, y, clicks)
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end
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end
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function RootView:get_overlay_base_color(overlay)
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if overlay == self.drag_overlay then
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return style.drag_overlay
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else
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return style.drag_overlay_tab
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end
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end
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function RootView:set_show_overlay(overlay, status)
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overlay.visible = status
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if status then -- reset colors
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-- reload base_color
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overlay.base_color = self:get_overlay_base_color(overlay)
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overlay.color[1] = overlay.base_color[1]
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overlay.color[2] = overlay.base_color[2]
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overlay.color[3] = overlay.base_color[3]
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overlay.color[4] = overlay.base_color[4]
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overlay.opacity = 0
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end
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end
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---@param button core.view.mousebutton
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---@param x number
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---@param y number
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function RootView:on_mouse_released(button, x, y, ...)
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if self.dragged_divider then
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self.dragged_divider = nil
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end
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if self.dragged_node then
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if button == "left" then
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if self.dragged_node.dragging then
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local node = self.root_node:get_child_overlapping_point(self.mouse.x, self.mouse.y)
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local dragged_node = self.dragged_node.node
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if node and not node.locked
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-- don't do anything if dragging onto own node, with only one view
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and (node ~= dragged_node or #node.views > 1) then
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local split_type = node:get_split_type(self.mouse.x, self.mouse.y)
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local view = dragged_node.views[self.dragged_node.idx]
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if split_type ~= "middle" and split_type ~= "tab" then -- needs splitting
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local new_node = node:split(split_type)
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self.root_node:get_node_for_view(view):remove_view(self.root_node, view)
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new_node:add_view(view)
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elseif split_type == "middle" and node ~= dragged_node then -- move to other node
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dragged_node:remove_view(self.root_node, view)
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node:add_view(view)
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self.root_node:get_node_for_view(view):set_active_view(view)
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elseif split_type == "tab" then -- move besides other tabs
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local tab_index = node:get_drag_overlay_tab_position(self.mouse.x, self.mouse.y, dragged_node, self.dragged_node.idx)
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dragged_node:remove_view(self.root_node, view)
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node:add_view(view, tab_index)
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self.root_node:get_node_for_view(view):set_active_view(view)
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end
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self.root_node:update_layout()
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core.redraw = true
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end
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end
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self:set_show_overlay(self.drag_overlay, false)
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self:set_show_overlay(self.drag_overlay_tab, false)
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if self.dragged_node and self.dragged_node.dragging then
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core.request_cursor("arrow")
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end
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self.dragged_node = nil
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end
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else -- avoid sending on_mouse_released events when dragging tabs
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self.root_node:on_mouse_released(button, x, y, ...)
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end
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end
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local function resize_child_node(node, axis, value, delta)
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local accept_resize = node.a:resize(axis, value)
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if not accept_resize then
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accept_resize = node.b:resize(axis, node.size[axis] - value)
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end
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if not accept_resize then
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node.divider = node.divider + delta / node.size[axis]
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end
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end
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---@param x number
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---@param y number
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---@param dx number
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---@param dy number
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function RootView:on_mouse_moved(x, y, dx, dy)
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if core.active_view == core.nag_view then
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core.request_cursor("arrow")
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core.active_view:on_mouse_moved(x, y, dx, dy)
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return
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end
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if self.dragged_divider then
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local node = self.dragged_divider
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if node.type == "hsplit" then
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x = common.clamp(x, 0, self.root_node.size.x * 0.95)
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resize_child_node(node, "x", x, dx)
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elseif node.type == "vsplit" then
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y = common.clamp(y, 0, self.root_node.size.y * 0.95)
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resize_child_node(node, "y", y, dy)
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end
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node.divider = common.clamp(node.divider, 0.01, 0.99)
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return
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end
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self.mouse.x, self.mouse.y = x, y
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local dn = self.dragged_node
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if dn and not dn.dragging then
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-- start dragging only after enough movement
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dn.dragging = common.distance(x, y, dn.drag_start_x, dn.drag_start_y) > style.tab_width * .05
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if dn.dragging then
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core.request_cursor("hand")
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end
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end
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-- avoid sending on_mouse_moved events when dragging tabs
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if dn then return end
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self.root_node:on_mouse_moved(x, y, dx, dy)
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local last_overlapping_node = self.overlapping_node
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self.overlapping_node = self.root_node:get_child_overlapping_point(x, y)
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if last_overlapping_node and last_overlapping_node ~= self.overlapping_node then
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last_overlapping_node:on_mouse_left()
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end
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local div = self.root_node:get_divider_overlapping_point(x, y)
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local tab_index = self.overlapping_node and self.overlapping_node:get_tab_overlapping_point(x, y)
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if self.overlapping_node and self.overlapping_node:get_scroll_button_index(x, y) then
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core.request_cursor("arrow")
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elseif div and (self.overlapping_node and not self.overlapping_node.active_view:scrollbar_overlaps_point(x, y)) then
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core.request_cursor(div.type == "hsplit" and "sizeh" or "sizev")
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elseif tab_index then
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core.request_cursor("arrow")
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elseif self.overlapping_node then
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core.request_cursor(self.overlapping_node.active_view.cursor)
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end
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end
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function RootView:on_mouse_left()
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if self.overlapping_node then
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self.overlapping_node:on_mouse_left()
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end
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end
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---@param filename string
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---@param x number
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---@param y number
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---@return boolean
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function RootView:on_file_dropped(filename, x, y)
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local node = self.root_node:get_child_overlapping_point(x, y)
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return node and node.active_view:on_file_dropped(filename, x, y)
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end
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function RootView:on_mouse_wheel(...)
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local x, y = self.mouse.x, self.mouse.y
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local node = self.root_node:get_child_overlapping_point(x, y)
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return node.active_view:on_mouse_wheel(...)
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end
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function RootView:on_text_input(...)
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core.active_view:on_text_input(...)
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end
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function RootView:on_focus_lost(...)
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-- We force a redraw so documents can redraw without the cursor.
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core.redraw = true
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end
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function RootView:interpolate_drag_overlay(overlay)
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self:move_towards(overlay, "x", overlay.to.x, nil, "tab_drag")
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self:move_towards(overlay, "y", overlay.to.y, nil, "tab_drag")
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self:move_towards(overlay, "w", overlay.to.w, nil, "tab_drag")
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self:move_towards(overlay, "h", overlay.to.h, nil, "tab_drag")
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self:move_towards(overlay, "opacity", overlay.visible and 100 or 0, nil, "tab_drag")
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overlay.color[4] = overlay.base_color[4] * overlay.opacity / 100
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end
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function RootView:update()
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Node.copy_position_and_size(self.root_node, self)
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self.root_node:update()
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self.root_node:update_layout()
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self:update_drag_overlay()
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self:interpolate_drag_overlay(self.drag_overlay)
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self:interpolate_drag_overlay(self.drag_overlay_tab)
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end
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function RootView:set_drag_overlay(overlay, x, y, w, h, immediate)
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overlay.to.x = x
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overlay.to.y = y
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overlay.to.w = w
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overlay.to.h = h
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if immediate then
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overlay.x = x
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overlay.y = y
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overlay.w = w
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overlay.h = h
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end
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if not overlay.visible then
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self:set_show_overlay(overlay, true)
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end
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end
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local function get_split_sizes(split_type, x, y, w, h)
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if split_type == "left" then
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w = w * .5
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elseif split_type == "right" then
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x = x + w * .5
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w = w * .5
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elseif split_type == "up" then
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h = h * .5
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elseif split_type == "down" then
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y = y + h * .5
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h = h * .5
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end
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return x, y, w, h
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end
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function RootView:update_drag_overlay()
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if not (self.dragged_node and self.dragged_node.dragging) then return end
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local over = self.root_node:get_child_overlapping_point(self.mouse.x, self.mouse.y)
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if over and not over.locked then
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local _, _, _, tab_h = over:get_scroll_button_rect(1)
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local x, y = over.position.x, over.position.y
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local w, h = over.size.x, over.size.y
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local split_type = over:get_split_type(self.mouse.x, self.mouse.y)
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if split_type == "tab" and (over ~= self.dragged_node.node or #over.views > 1) then
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local tab_index, tab_x, tab_y, tab_w, tab_h = over:get_drag_overlay_tab_position(self.mouse.x, self.mouse.y)
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self:set_drag_overlay(self.drag_overlay_tab,
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tab_x + (tab_index and 0 or tab_w), tab_y,
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style.caret_width, tab_h,
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-- avoid showing tab overlay moving between nodes
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over ~= self.drag_overlay_tab.last_over)
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self:set_show_overlay(self.drag_overlay, false)
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self.drag_overlay_tab.last_over = over
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else
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if (over ~= self.dragged_node.node or #over.views > 1) then
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y = y + tab_h
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h = h - tab_h
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x, y, w, h = get_split_sizes(split_type, x, y, w, h)
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end
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self:set_drag_overlay(self.drag_overlay, x, y, w, h)
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self:set_show_overlay(self.drag_overlay_tab, false)
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end
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else
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self:set_show_overlay(self.drag_overlay, false)
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self:set_show_overlay(self.drag_overlay_tab, false)
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end
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end
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function RootView:draw_grabbed_tab()
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local dn = self.dragged_node
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local _,_, w, h = dn.node:get_tab_rect(dn.idx)
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local x = self.mouse.x - w / 2
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local y = self.mouse.y - h / 2
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local view = dn.node.views[dn.idx]
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self.root_node:draw_tab(view, true, true, false, x, y, w, h, true)
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end
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function RootView:draw_drag_overlay(ov)
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if ov.opacity > 0 then
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renderer.draw_rect(ov.x, ov.y, ov.w, ov.h, ov.color)
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end
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end
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function RootView:draw()
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self.root_node:draw()
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while #self.deferred_draws > 0 do
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local t = table.remove(self.deferred_draws)
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t.fn(table.unpack(t))
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end
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self:draw_drag_overlay(self.drag_overlay)
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self:draw_drag_overlay(self.drag_overlay_tab)
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if self.dragged_node and self.dragged_node.dragging then
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self:draw_grabbed_tab()
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end
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if core.cursor_change_req then
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system.set_cursor(core.cursor_change_req)
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core.cursor_change_req = nil
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end
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end
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return RootView
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