570 lines
17 KiB
Python
570 lines
17 KiB
Python
#!/usr/bin/env python3
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import asyncio
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import datetime
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import enum
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import logging
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import random
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import signal
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import typing
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import coloredlogs
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import i3ipc
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import i3ipc.aio
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coloredlogs.install(level="DEBUG", fmt="%(levelname)s %(message)s")
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log = logging.getLogger()
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T = typing.TypeVar("T", bound="ComposableText")
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class ComposableText:
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def getFirstParentOfType(self, typ: typing.Type[T]) -> T:
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parent = self
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while not isinstance(parent, typ):
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assert parent.parent, f"{self} doesn't have a parent of {typ}"
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parent = parent.parent
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return parent
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def __init__(self, parent: typing.Optional["ComposableText"] = None) -> None:
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self.parent = parent
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self.bar = self.getFirstParentOfType(Bar)
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def updateMarkup(self) -> None:
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self.bar.refresh.set()
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# TODO OPTI See if worth caching the output
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def generateMarkup(self) -> str:
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raise NotImplementedError(f"{self} cannot generate markup")
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def getMarkup(self) -> str:
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return self.generateMarkup()
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def randomColor(seed: int | bytes | None = None) -> str:
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if seed is not None:
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random.seed(seed)
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return "#" + "".join(f"{random.randint(0, 0xff):02x}" for _ in range(3))
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class Button(enum.Enum):
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CLICK_LEFT = "1"
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CLICK_MIDDLE = "2"
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CLICK_RIGHT = "3"
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SCROLL_UP = "4"
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SCROLL_DOWN = "5"
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class Section(ComposableText):
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"""
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Colorable block separated by chevrons
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"""
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def __init__(self, parent: "Module") -> None:
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super().__init__(parent=parent)
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self.parent: "Module"
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self.color = randomColor()
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self.desiredText: str | None = None
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self.text = ""
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self.targetSize = -1
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self.size = -1
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self.animationTask: asyncio.Task | None = None
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self.actions: dict[Button, str] = dict()
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def isHidden(self) -> bool:
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return self.size < 0
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# Geometric series, with a cap
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ANIM_A = 0.025
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ANIM_R = 0.9
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ANIM_MIN = 0.001
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async def animate(self) -> None:
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increment = 1 if self.size < self.targetSize else -1
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loop = asyncio.get_running_loop()
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frameTime = loop.time()
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animTime = self.ANIM_A
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while self.size != self.targetSize:
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self.size += increment
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self.updateMarkup()
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animTime *= self.ANIM_R
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animTime = max(self.ANIM_MIN, animTime)
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frameTime += animTime
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sleepTime = frameTime - loop.time()
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# In case of stress, skip refreshing by not awaiting
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if sleepTime > 0:
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await asyncio.sleep(sleepTime)
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else:
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log.warning("Skipped an animation frame")
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def setText(self, text: str | None) -> None:
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# OPTI Don't redraw nor reset animation if setting the same text
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if self.desiredText == text:
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return
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self.desiredText = text
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if text is None:
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self.text = ""
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self.targetSize = -1
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else:
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self.text = f" {text} "
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self.targetSize = len(self.text)
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if self.animationTask:
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self.animationTask.cancel()
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# OPTI Skip the whole animation task if not required
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if self.size == self.targetSize:
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self.updateMarkup()
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else:
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self.animationTask = self.bar.taskGroup.create_task(self.animate())
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def setAction(self, button: Button, callback: typing.Callable | None) -> None:
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if button in self.actions:
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command = self.actions[button]
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self.bar.removeAction(command)
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del self.actions[button]
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if callback:
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command = self.bar.addAction(callback)
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self.actions[button] = command
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def generateMarkup(self) -> str:
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assert not self.isHidden()
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pad = max(0, self.size - len(self.text))
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text = self.text[: self.size] + " " * pad
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for button, command in self.actions.items():
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text = "%{A" + button.value + ":" + command + ":}" + text + "%{A}"
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return text
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class Module(ComposableText):
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"""
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Sections handled by a same updater
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"""
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def __init__(self, parent: "Side") -> None:
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super().__init__(parent=parent)
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self.parent: "Side"
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self.sections: list[Section] = []
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self.mirroring: Module | None = None
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self.mirrors: list[Module] = list()
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def mirror(self, module: "Module") -> None:
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self.mirroring = module
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module.mirrors.append(self)
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def getSections(self) -> list[Section]:
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if self.mirroring:
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return self.mirroring.sections
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else:
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return self.sections
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def updateMarkup(self) -> None:
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super().updateMarkup()
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for mirror in self.mirrors:
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mirror.updateMarkup()
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class Alignment(enum.Enum):
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LEFT = "l"
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RIGHT = "r"
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CENTER = "c"
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class Side(ComposableText):
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def __init__(self, parent: "Screen", alignment: Alignment) -> None:
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super().__init__(parent=parent)
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self.parent: Screen
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self.alignment = alignment
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self.modules: list[Module] = []
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def generateMarkup(self) -> str:
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if not self.modules:
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return ""
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text = "%{" + self.alignment.value + "}"
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lastSection: Section | None = None
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for module in self.modules:
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for section in module.getSections():
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if section.isHidden():
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continue
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if lastSection is None:
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if self.alignment == Alignment.LEFT:
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text += "%{B" + section.color + "}%{F-}"
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else:
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text += "%{B-}%{F" + section.color + "}%{R}%{F-}"
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else:
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if self.alignment == Alignment.RIGHT:
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if lastSection.color == section.color:
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text += ""
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else:
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text += "%{F" + section.color + "}%{R}"
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else:
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if lastSection.color == section.color:
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text += ""
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else:
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text += "%{R}%{B" + section.color + "}"
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text += "%{F-}"
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text += section.getMarkup()
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lastSection = section
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if self.alignment != Alignment.RIGHT:
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text += "%{R}%{B-}"
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return text
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class Screen(ComposableText):
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def __init__(self, parent: "Bar", output: str) -> None:
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super().__init__(parent=parent)
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self.parent: "Bar"
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self.output = output
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self.sides = dict()
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for alignment in Alignment:
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self.sides[alignment] = Side(parent=self, alignment=alignment)
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def generateMarkup(self) -> str:
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return ("%{Sn" + self.output + "}") + "".join(
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side.getMarkup() for side in self.sides.values()
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)
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class Bar(ComposableText):
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"""
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Top-level
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"""
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def __init__(self) -> None:
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super().__init__()
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self.refresh = asyncio.Event()
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self.taskGroup = asyncio.TaskGroup()
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self.providers: list["Provider"] = list()
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self.actionIndex = 0
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self.actions: dict[str, typing.Callable] = dict()
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self.screens = []
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i3 = i3ipc.Connection()
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for output in i3.get_outputs():
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if not output.active:
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continue
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screen = Screen(parent=self, output=output.name)
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self.screens.append(screen)
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async def run(self) -> None:
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cmd = [
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"lemonbar",
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"-b",
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"-a",
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"64",
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"-f",
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"DejaVuSansM Nerd Font:size=10",
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]
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proc = await asyncio.create_subprocess_exec(
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*cmd, stdout=asyncio.subprocess.PIPE, stdin=asyncio.subprocess.PIPE
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)
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async def refresher() -> None:
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assert proc.stdin
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while True:
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await self.refresh.wait()
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self.refresh.clear()
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markup = self.getMarkup()
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# log.debug(markup)
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proc.stdin.write(markup.encode())
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async def actionHandler() -> None:
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assert proc.stdout
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while True:
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line = await proc.stdout.readline()
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command = line.decode().strip()
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callback = self.actions[command]
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callback()
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longRunningTasks = list()
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def addLongRunningTask(coro: typing.Coroutine) -> None:
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task = self.taskGroup.create_task(coro)
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longRunningTasks.append(task)
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async with self.taskGroup:
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addLongRunningTask(refresher())
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addLongRunningTask(actionHandler())
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for provider in self.providers:
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addLongRunningTask(provider.run())
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def exit() -> None:
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log.info("Terminating")
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for task in longRunningTasks:
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task.cancel()
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loop = asyncio.get_event_loop()
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loop.add_signal_handler(signal.SIGINT, exit)
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def generateMarkup(self) -> str:
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return "".join(section.getMarkup() for section in self.screens) + "\n"
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def addProvider(
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self,
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provider: "Provider",
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alignment: Alignment = Alignment.LEFT,
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screenNum: int | None = None,
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) -> None:
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"""
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screenNum: the provider will be added on this screen if set, all otherwise
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"""
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modules = list()
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for s, screen in enumerate(self.screens):
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if screenNum is None or s == screenNum:
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side = screen.sides[alignment]
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module = Module(parent=side)
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side.modules.append(module)
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modules.append(module)
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provider.modules = modules
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if modules:
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self.providers.append(provider)
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def addAction(self, callback: typing.Callable) -> str:
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command = f"{self.actionIndex:x}"
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self.actions[command] = callback
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self.actionIndex += 1
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return command
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def removeAction(self, command: str) -> None:
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del self.actions[command]
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class Provider:
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def __init__(self) -> None:
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self.modules: list[Module] = list()
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async def run(self) -> None:
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raise NotImplementedError()
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class MirrorProvider(Provider):
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def __init__(self) -> None:
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super().__init__()
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self.module: Module
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async def run(self) -> None:
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self.module = self.modules[0]
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for module in self.modules[1:]:
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module.mirror(self.module)
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class SingleSectionProvider(MirrorProvider):
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def __init__(self) -> None:
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super().__init__()
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self.section: Section
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async def run(self) -> None:
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await super().run()
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self.section = Section(parent=self.module)
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self.module.sections.append(self.section)
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class StaticProvider(SingleSectionProvider):
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def __init__(self, text: str) -> None:
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self.text = text
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async def run(self) -> None:
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await super().run()
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self.section.setText(self.text)
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class StatefulProvider(SingleSectionProvider):
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# TODO Should actually be a Section descendant
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NUMBER_STATES: int
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def __init__(self) -> None:
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super().__init__()
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self.state = 0
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self.stateChanged = asyncio.Event()
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def incrementState(self) -> None:
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self.state += 1
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self.changeState()
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def decrementState(self) -> None:
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self.state -= 1
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self.changeState()
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def changeState(self) -> None:
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self.state %= self.NUMBER_STATES
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self.stateChanged.set()
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self.stateChanged.clear()
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async def run(self) -> None:
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await super().run()
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self.section.setAction(Button.CLICK_LEFT, self.incrementState)
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self.section.setAction(Button.CLICK_RIGHT, self.decrementState)
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# Providers
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class I3ModeProvider(SingleSectionProvider):
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def on_mode(self, i3: i3ipc.Connection, e: i3ipc.Event) -> None:
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self.section.setText(None if e.change == "default" else e.change)
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async def run(self) -> None:
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await super().run()
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i3 = await i3ipc.aio.Connection(auto_reconnect=True).connect()
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i3.on(i3ipc.Event.MODE, self.on_mode)
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await i3.main()
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class I3WindowTitleProvider(SingleSectionProvider):
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# TODO FEAT To make this available from start, we need to find the
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# `focused=True` element following the `focus` array
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def on_window(self, i3: i3ipc.Connection, e: i3ipc.Event) -> None:
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self.section.setText(e.container.name)
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async def run(self) -> None:
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await super().run()
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i3 = await i3ipc.aio.Connection(auto_reconnect=True).connect()
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i3.on(i3ipc.Event.WINDOW, self.on_window)
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await i3.main()
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class I3WorkspacesProvider(Provider):
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# FIXME Custom names
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# FIXME Colors
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async def updateWorkspaces(self, i3: i3ipc.Connection) -> None:
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"""
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Since the i3 IPC interface cannot really tell you by events
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when workspaces get invisible or not urgent anymore.
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Relying on those exclusively would require reimplementing some of i3 logic.
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Fetching all the workspaces on event looks ugly but is the most maintainable.
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Times I tried to challenge this and failed: 2.
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"""
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workspaces = await i3.get_workspaces()
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for workspace in workspaces:
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module = self.modulesFromOutput[workspace.output]
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insert = False
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if workspace.num in self.sections:
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section = self.sections[workspace.num]
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if section.parent != module:
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section.parent.sections.remove(section)
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section.parent = module
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section.updateMarkup()
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insert = True
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else:
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section = Section(parent=module)
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self.sections[workspace.num] = section
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insert = True
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def generate_switch_workspace(num: int) -> typing.Callable:
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def switch_workspace() -> None:
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self.bar.taskGroup.create_task(
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i3.command(f"workspace number {num}")
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)
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return switch_workspace
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section.setAction(
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Button.CLICK_LEFT, generate_switch_workspace(workspace.num)
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)
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if insert:
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module.sections.append(section)
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revSections = dict((v, k) for k, v in self.sections.items())
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module.sections.sort(key=lambda s: revSections[s])
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name = workspace.name
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if workspace.urgent:
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name = f"{name} !"
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elif workspace.focused:
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name = f"{name} +"
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elif workspace.visible:
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name = f"{name} *"
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section.setText(name)
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workspacesNums = set(workspace.num for workspace in workspaces)
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for num, section in self.sections.items():
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if num not in workspacesNums:
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# This should delete the Section but it turned out to be hard
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section.setText(None)
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def onWorkspaceChange(
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self, i3: i3ipc.Connection, e: i3ipc.Event | None = None
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) -> None:
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# Cancelling the task doesn't seem to prevent performance double-events
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self.bar.taskGroup.create_task(self.updateWorkspaces(i3))
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def __init__(
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self,
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) -> None:
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super().__init__()
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self.sections: dict[int, Section] = dict()
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self.modulesFromOutput: dict[str, Module] = dict()
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self.bar: Bar
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async def run(self) -> None:
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for module in self.modules:
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screen = module.getFirstParentOfType(Screen)
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output = screen.output
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self.modulesFromOutput[output] = module
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self.bar = module.bar
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i3 = await i3ipc.aio.Connection(auto_reconnect=True).connect()
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i3.on(i3ipc.Event.WORKSPACE, self.onWorkspaceChange)
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self.onWorkspaceChange(i3)
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await i3.main()
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class TimeProvider(StatefulProvider):
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FORMATS = ["%H:%M", "%m-%d %H:%M:%S", "%a %y-%m-%d %H:%M:%S"]
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NUMBER_STATES = len(FORMATS)
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async def run(self) -> None:
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await super().run()
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self.state = 1
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while True:
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now = datetime.datetime.now()
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format = self.FORMATS[self.state]
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self.section.setText(now.strftime(format))
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remaining = 1 - now.microsecond / 1000000
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try:
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await asyncio.wait_for(self.stateChanged.wait(), remaining)
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except TimeoutError:
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pass
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async def main() -> None:
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bar = Bar()
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dualScreen = len(bar.screens) > 1
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bar.addProvider(I3ModeProvider(), alignment=Alignment.LEFT)
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bar.addProvider(I3WorkspacesProvider(), alignment=Alignment.LEFT)
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if dualScreen:
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bar.addProvider(
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I3WindowTitleProvider(), screenNum=0, alignment=Alignment.CENTER
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)
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bar.addProvider(
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StaticProvider(text="mpris"),
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screenNum=1 if dualScreen else None,
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alignment=Alignment.CENTER,
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)
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bar.addProvider(StaticProvider("C L M T B"), alignment=Alignment.RIGHT)
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bar.addProvider(
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StaticProvider("pulse"),
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|
screenNum=1 if dualScreen else None,
|
|
alignment=Alignment.RIGHT,
|
|
)
|
|
bar.addProvider(
|
|
StaticProvider("network"),
|
|
screenNum=0 if dualScreen else None,
|
|
alignment=Alignment.RIGHT,
|
|
)
|
|
bar.addProvider(TimeProvider(), alignment=Alignment.RIGHT)
|
|
|
|
await bar.run()
|
|
|
|
|
|
asyncio.run(main())
|