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Diffstat (limited to 'awesome/lib/awful/client/focus.lua')
| -rw-r--r-- | awesome/lib/awful/client/focus.lua | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/awesome/lib/awful/client/focus.lua b/awesome/lib/awful/client/focus.lua new file mode 100644 index 0000000..a8b04f2 --- /dev/null +++ b/awesome/lib/awful/client/focus.lua @@ -0,0 +1,215 @@ +--------------------------------------------------------------------------- +--- Keep track of the focused clients. +-- +-- @author Julien Danjou <julien@danjou.info> +-- @copyright 2008 Julien Danjou +-- @submodule client +--------------------------------------------------------------------------- +local grect = require("gears.geometry").rectangle + +local capi = +{ + screen = screen, + client = client, +} + +-- We use a metatable to prevent circular dependency loops. +local screen +do + screen = setmetatable({}, { + __index = function(_, k) + screen = require("awful.screen") + return screen[k] + end, + __newindex = error -- Just to be sure in case anything ever does this + }) +end + +local client +do + client = setmetatable({}, { + __index = function(_, k) + client = require("awful.client") + return client[k] + end, + __newindex = error -- Just to be sure in case anything ever does this + }) +end + +local focus = {history = {list = {}}} + +local function get_screen(s) + return s and capi.screen[s] +end + +--- Remove a client from the focus history +-- +-- @client c The client that must be removed. +-- @function awful.client.focus.history.delete +function focus.history.delete(c) + for k, v in ipairs(focus.history.list) do + if v == c then + table.remove(focus.history.list, k) + break + end + end +end + +--- Focus a client by its relative index. +-- +-- @function awful.client.focus.byidx +-- @param i The index. +-- @client[opt] c The client. +function focus.byidx(i, c) + local target = client.next(i, c) + if target then + target:emit_signal("request::activate", "client.focus.byidx", + {raise=true}) + end +end + +--- Filter out window that we do not want handled by focus. +-- This usually means that desktop, dock and splash windows are +-- not registered and cannot get focus. +-- +-- @client c A client. +-- @return The same client if it's ok, nil otherwise. +-- @function awful.client.focus.filter +function focus.filter(c) + if c.type == "desktop" + or c.type == "dock" + or c.type == "splash" + or not c.focusable then + return nil + end + return c +end + +--- Update client focus history. +-- +-- @client c The client that has been focused. +-- @function awful.client.focus.history.add +function focus.history.add(c) + -- Remove the client if its in stack + focus.history.delete(c) + -- Record the client has latest focused + table.insert(focus.history.list, 1, c) +end + +--- Get the latest focused client for a screen in history. +-- +-- @tparam int|screen s The screen to look for. +-- @tparam int idx The index: 0 will return first candidate, +-- 1 will return second, etc. +-- @tparam function filter An optional filter. If no client is found in the +-- first iteration, `awful.client.focus.filter` is used by default to get any +-- client. +-- @treturn client.object A client. +-- @function awful.client.focus.history.get +function focus.history.get(s, idx, filter) + s = get_screen(s) + -- When this counter is equal to idx, we return the client + local counter = 0 + local vc = client.visible(s, true) + for _, c in ipairs(focus.history.list) do + if get_screen(c.screen) == s then + if not filter or filter(c) then + for _, vcc in ipairs(vc) do + if vcc == c then + if counter == idx then + return c + end + -- We found one, increment the counter only. + counter = counter + 1 + break + end + end + end + end + end + -- Argh nobody found in history, give the first one visible if there is one + -- that passes the filter. + filter = filter or focus.filter + if counter == 0 then + for _, v in ipairs(vc) do + if filter(v) then + return v + end + end + end +end + +--- Focus the previous client in history. +-- @function awful.client.focus.history.previous +function focus.history.previous() + local sel = capi.client.focus + local s = sel and sel.screen or screen.focused() + local c = focus.history.get(s, 1) + if c then + c:emit_signal("request::activate", "client.focus.history.previous", + {raise=false}) + end +end + +--- Focus a client by the given direction. +-- +-- @tparam string dir The direction, can be either +-- `"up"`, `"down"`, `"left"` or `"right"`. +-- @client[opt] c The client. +-- @tparam[opt=false] boolean stacked Use stacking order? (top to bottom) +-- @function awful.client.focus.bydirection +function focus.bydirection(dir, c, stacked) + local sel = c or capi.client.focus + if sel then + local cltbl = client.visible(sel.screen, stacked) + local geomtbl = {} + for i,cl in ipairs(cltbl) do + geomtbl[i] = cl:geometry() + end + + local target = grect.get_in_direction(dir, geomtbl, sel:geometry()) + + -- If we found a client to focus, then do it. + if target then + cltbl[target]:emit_signal("request::activate", + "client.focus.bydirection", {raise=false}) + end + end +end + +--- Focus a client by the given direction. Moves across screens. +-- +-- @param dir The direction, can be either "up", "down", "left" or "right". +-- @client[opt] c The client. +-- @tparam[opt=false] boolean stacked Use stacking order? (top to bottom) +-- @function awful.client.focus.global_bydirection +function focus.global_bydirection(dir, c, stacked) + local sel = c or capi.client.focus + local scr = get_screen(sel and sel.screen or screen.focused()) + + -- change focus inside the screen + focus.bydirection(dir, sel) + + -- if focus not changed, we must change screen + if sel == capi.client.focus then + screen.focus_bydirection(dir, scr) + if scr ~= get_screen(screen.focused()) then + local cltbl = client.visible(screen.focused(), stacked) + local geomtbl = {} + for i,cl in ipairs(cltbl) do + geomtbl[i] = cl:geometry() + end + local target = grect.get_in_direction(dir, geomtbl, scr.geometry) + + if target then + cltbl[target]:emit_signal("request::activate", + "client.focus.global_bydirection", + {raise=false}) + end + end + end +end + +return focus + +-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80 |