From 9b322660ee6b7640af24def50a7fb8615a8ab126 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Thu, 26 Jan 2017 12:25:52 +0100
Subject: Basic support for desktops/pages.

---
 workspace.lua | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 workspace.lua

(limited to 'workspace.lua')

diff --git a/workspace.lua b/workspace.lua
new file mode 100644
index 0000000..537345d
--- /dev/null
+++ b/workspace.lua
@@ -0,0 +1,127 @@
+local M = {}
+
+local awful = require("awful")
+local desktop = require("desktop")
+local object = require("gears.object")
+
+local Workspace = {}
+
+function Workspace:add_desktop(name, nb_pages)
+    idx = #self.desktops + 1
+    self.desktops[idx] = desktop.new(idx, name, nb_pages, self.layouts[1])
+    return idx
+end
+
+function Workspace:_apply_state()
+    orig_focus = mouse.screen
+
+    for s = 1, screen.count() do
+        if self.screen_state[s] then
+            awful.tag.viewnone(s)
+
+            desk = self.screen_state[s].desktop
+            page = self.desktops[desk].pages[self.screen_state[s].page]
+            awful.tag.setscreen(page, s)
+        end
+    end
+    for s = 1, screen.count() do
+        state = self.screen_state[s]
+        if state then
+            desk_idx = state.desktop
+            desk     = self.desktops[desk_idx]
+            page_idx = state.page
+            page     = desk.pages[page_idx]
+            print("workspace displaying: " .. s .. " => " .. desk_idx .. "/" .. page_idx)
+
+            awful.tag.viewonly(page)
+
+            desk:emit_signal("page:view", s, page_idx)
+        end
+    end
+
+    awful.screen.focus(orig_focus)
+end
+
+function Workspace:view(screen, desktop, page_idx)
+    print("workspace: " .. screen .. ": view " .. desktop .. "/" .. (page_idx or "nil"))
+    -- the page currently displayed on the target screen
+    old = {}
+    if self.screen_state[screen] then
+        old.desk     = self.screen_state[screen].desktop
+        old.page_idx = self.screen_state[screen].page
+        old.page     = self.desktops[old.desk].pages[page_old_idx]
+        print(screen .. " now showing " .. old.desk .. "/" .. old.page_idx)
+    end
+
+    -- the page to display on the target screen
+    page_idx = self.desktops[desktop]:show(screen, page_idx)
+    if page_idx then
+        page_new = self.desktops[desktop].pages[page_idx]
+    end
+
+    -- the screen on which the new page is currently displayed (if any)
+    screen_cur = nil
+    if page_new and page_new.selected then
+        screen_cur = awful.tag.getscreen(page_new)
+        print("page " .. page_idx .. " now displayed on " .. screen_cur)
+    end
+
+    if old.page ~= page_new or page_new == nil then
+        self.screen_state[screen] = { page = page_idx, desktop = desktop }
+        if desktop ~= old.desk then
+            self.signals:emit_signal("desktop:view", screen, desktop)
+        end
+
+        if screen_cur then
+            desk_prev = self.screen_state[screen_cur].desktop
+            old.page_idx = self.desktops[old.desk]:show(screen_cur, old.page_idx)
+
+            self.screen_state[screen_cur] = { page = old.page_idx, desktop = old.desk }
+            if desk_prev ~= old.desk then
+                self.signals:emit_signal("desktop:view", screen_cur, old.desk)
+            end
+        end
+
+
+        self:_apply_state()
+    end
+end
+
+function Workspace:view_relative(offset, screen)
+    screen = screen or mouse.screen
+    print("view relative " .. offset .. " on " .. screen)
+
+    state = self.screen_state[screen]
+    if state then
+        desk = state.desktop
+        print("state " .. state.page .. " res " .. (state.page + offset) % 10)
+        page = 1 + ((state.page - 1 + offset) % #self.desktops[desk].pages)
+        print("desk " .. desk .. " " .. #self.desktops[desk].pages)
+        print("view relative switch to " .. page)
+
+        self:view(screen, desk, page)
+    end
+end
+
+function Workspace:move_client(client, desk, page)
+    print("move to " .. desk .. "/" .. page)
+    awful.client.movetotag(self.desktops[desk].pages[page], client)
+end
+
+function Workspace:new(layouts)
+    local o = setmetatable({}, self)
+    self.__index = self
+
+    o.desktops     = {}
+    o.screen_state = {}
+    o.layouts      = layouts
+
+    o.signals   = object()
+    o.signals:add_signal("desktop:view")
+
+    return o
+end
+
+M.Workspace = Workspace
+
+return M
-- 
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