ayon-core/openpype/tools/utils/delegates.py

import time
from datetime import datetime
import logging
import numbers

import Qt
from Qt import QtWidgets, QtGui, QtCore

from avalon.lib import HeroVersionType
from openpype.style import get_objected_colors
from .models import (
    AssetModel,
    TreeModel
)
from . import lib

if Qt.__binding__ == "PySide":
    from PySide.QtGui import QStyleOptionViewItemV4
elif Qt.__binding__ == "PyQt4":
    from PyQt4.QtGui import QStyleOptionViewItemV4

log = logging.getLogger(__name__)


class AssetDelegate(QtWidgets.QItemDelegate):
    bar_height = 3

    def __init__(self, *args, **kwargs):
        super(AssetDelegate, self).__init__(*args, **kwargs)
        asset_view_colors = get_objected_colors()["loader"]["asset-view"]
        self._selected_color = (
            asset_view_colors["selected"].get_qcolor()
        )
        self._hover_color = (
            asset_view_colors["hover"].get_qcolor()
        )
        self._selected_hover_color = (
            asset_view_colors["selected-hover"].get_qcolor()
        )

    def sizeHint(self, option, index):
        result = super(AssetDelegate, self).sizeHint(option, index)
        height = result.height()
        result.setHeight(height + self.bar_height)

        return result

    def paint(self, painter, option, index):
        # Qt4 compat
        if Qt.__binding__ in ("PySide", "PyQt4"):
            option = QStyleOptionViewItemV4(option)

        painter.save()

        item_rect = QtCore.QRect(option.rect)
        item_rect.setHeight(option.rect.height() - self.bar_height)

        subset_colors = index.data(AssetModel.subsetColorsRole)
        subset_colors_width = 0
        if subset_colors:
            subset_colors_width = option.rect.width() / len(subset_colors)

        subset_rects = []
        counter = 0
        for subset_c in subset_colors:
            new_color = None
            new_rect = None
            if subset_c:
                new_color = QtGui.QColor(*subset_c)

                new_rect = QtCore.QRect(
                    option.rect.left() + (counter * subset_colors_width),
                    option.rect.top() + (
                        option.rect.height() - self.bar_height
                    ),
                    subset_colors_width,
                    self.bar_height
                )
            subset_rects.append((new_color, new_rect))
            counter += 1

        # Background
        if option.state & QtWidgets.QStyle.State_Selected:
            if len(subset_colors) == 0:
                item_rect.setTop(item_rect.top() + (self.bar_height / 2))

            if option.state & QtWidgets.QStyle.State_MouseOver:
                bg_color = self._selected_hover_color
            else:
                bg_color = self._selected_color
        else:
            item_rect.setTop(item_rect.top() + (self.bar_height / 2))
            if option.state & QtWidgets.QStyle.State_MouseOver:
                bg_color = self._hover_color
            else:
                bg_color = QtGui.QColor()
                bg_color.setAlpha(0)

        # When not needed to do a rounded corners (easier and without
        #   painter restore):
        # painter.fillRect(
        #     item_rect,
        #     QtGui.QBrush(bg_color)
        # )
        pen = painter.pen()
        pen.setStyle(QtCore.Qt.NoPen)
        pen.setWidth(0)
        painter.setPen(pen)
        painter.setBrush(QtGui.QBrush(bg_color))
        painter.drawRoundedRect(option.rect, 3, 3)

        if option.state & QtWidgets.QStyle.State_Selected:
            for color, subset_rect in subset_rects:
                if not color or not subset_rect:
                    continue
                painter.fillRect(subset_rect, QtGui.QBrush(color))

        painter.restore()
        painter.save()

        # Icon
        icon_index = index.model().index(
            index.row(), index.column(), index.parent()
        )
        # - Default icon_rect if not icon
        icon_rect = QtCore.QRect(
            item_rect.left(),
            item_rect.top(),
            # To make sure it's same size all the time
            option.rect.height() - self.bar_height,
            option.rect.height() - self.bar_height
        )
        icon = index.model().data(icon_index, QtCore.Qt.DecorationRole)

        if icon:
            mode = QtGui.QIcon.Normal
            if not (option.state & QtWidgets.QStyle.State_Enabled):
                mode = QtGui.QIcon.Disabled
            elif option.state & QtWidgets.QStyle.State_Selected:
                mode = QtGui.QIcon.Selected

            if isinstance(icon, QtGui.QPixmap):
                icon = QtGui.QIcon(icon)
                option.decorationSize = icon.size() / icon.devicePixelRatio()

            elif isinstance(icon, QtGui.QColor):
                pixmap = QtGui.QPixmap(option.decorationSize)
                pixmap.fill(icon)
                icon = QtGui.QIcon(pixmap)

            elif isinstance(icon, QtGui.QImage):
                icon = QtGui.QIcon(QtGui.QPixmap.fromImage(icon))
                option.decorationSize = icon.size() / icon.devicePixelRatio()

            elif isinstance(icon, QtGui.QIcon):
                state = QtGui.QIcon.Off
                if option.state & QtWidgets.QStyle.State_Open:
                    state = QtGui.QIcon.On
                actualSize = option.icon.actualSize(
                    option.decorationSize, mode, state
                )
                option.decorationSize = QtCore.QSize(
                    min(option.decorationSize.width(), actualSize.width()),
                    min(option.decorationSize.height(), actualSize.height())
                )

            state = QtGui.QIcon.Off
            if option.state & QtWidgets.QStyle.State_Open:
                state = QtGui.QIcon.On

            icon.paint(
                painter, icon_rect,
                QtCore.Qt.AlignLeft, mode, state
            )

        # Text
        text_rect = QtCore.QRect(
            icon_rect.left() + icon_rect.width() + 2,
            item_rect.top(),
            item_rect.width(),
            item_rect.height()
        )

        painter.drawText(
            text_rect, QtCore.Qt.AlignVCenter,
            index.data(QtCore.Qt.DisplayRole)
        )

        painter.restore()


class VersionDelegate(QtWidgets.QStyledItemDelegate):
    """A delegate that display version integer formatted as version string."""

    version_changed = QtCore.Signal()
    first_run = False
    lock = False

    def __init__(self, dbcon, *args, **kwargs):
        self.dbcon = dbcon
        super(VersionDelegate, self).__init__(*args, **kwargs)

    def displayText(self, value, locale):
        if isinstance(value, HeroVersionType):
            return lib.format_version(value, True)
        assert isinstance(value, numbers.Integral), (
            "Version is not integer. \"{}\" {}".format(value, str(type(value)))
        )
        return lib.format_version(value)

    def paint(self, painter, option, index):
        fg_color = index.data(QtCore.Qt.ForegroundRole)
        if fg_color:
            if isinstance(fg_color, QtGui.QBrush):
                fg_color = fg_color.color()
            elif isinstance(fg_color, QtGui.QColor):
                pass
            else:
                fg_color = None

        if not fg_color:
            return super(VersionDelegate, self).paint(painter, option, index)

        if option.widget:
            style = option.widget.style()
        else:
            style = QtWidgets.QApplication.style()

        style.drawControl(
            style.CE_ItemViewItem, option, painter, option.widget
        )

        painter.save()

        text = self.displayText(
            index.data(QtCore.Qt.DisplayRole), option.locale
        )
        pen = painter.pen()
        pen.setColor(fg_color)
        painter.setPen(pen)

        text_rect = style.subElementRect(style.SE_ItemViewItemText, option)
        text_margin = style.proxy().pixelMetric(
            style.PM_FocusFrameHMargin, option, option.widget
        ) + 1

        painter.drawText(
            text_rect.adjusted(text_margin, 0, - text_margin, 0),
            option.displayAlignment,
            text
        )

        painter.restore()

    def createEditor(self, parent, option, index):
        item = index.data(TreeModel.ItemRole)
        if item.get("isGroup") or item.get("isMerged"):
            return

        editor = QtWidgets.QComboBox(parent)

        def commit_data():
            if not self.first_run:
                self.commitData.emit(editor)  # Update model data
                self.version_changed.emit()   # Display model data
        editor.currentIndexChanged.connect(commit_data)

        self.first_run = True
        self.lock = False

        return editor

    def setEditorData(self, editor, index):
        if self.lock:
            # Only set editor data once per delegation
            return

        editor.clear()

        # Current value of the index
        item = index.data(TreeModel.ItemRole)
        value = index.data(QtCore.Qt.DisplayRole)
        if item["version_document"]["type"] != "hero_version":
            assert isinstance(value, numbers.Integral), (
                "Version is not integer"
            )

        # Add all available versions to the editor
        parent_id = item["version_document"]["parent"]
        version_docs = list(self.dbcon.find(
            {
                "type": "version",
                "parent": parent_id
            },
            sort=[("name", 1)]
        ))

        hero_version_doc = self.dbcon.find_one(
            {
                "type": "hero_version",
                "parent": parent_id
            }, {
                "name": 1,
                "data.tags": 1,
                "version_id": 1
            }
        )

        doc_for_hero_version = None

        selected = None
        items = []
        for version_doc in version_docs:
            version_tags = version_doc["data"].get("tags") or []
            if "deleted" in version_tags:
                continue

            if (
                hero_version_doc
                and doc_for_hero_version is None
                and hero_version_doc["version_id"] == version_doc["_id"]
            ):
                doc_for_hero_version = version_doc

            label = lib.format_version(version_doc["name"])
            item = QtGui.QStandardItem(label)
            item.setData(version_doc, QtCore.Qt.UserRole)
            items.append(item)

            if version_doc["name"] == value:
                selected = item

        if hero_version_doc and doc_for_hero_version:
            version_name = doc_for_hero_version["name"]
            label = lib.format_version(version_name, True)
            if isinstance(value, HeroVersionType):
                index = len(version_docs)
            hero_version_doc["name"] = HeroVersionType(version_name)

            item = QtGui.QStandardItem(label)
            item.setData(hero_version_doc, QtCore.Qt.UserRole)
            items.append(item)

        # Reverse items so latest versions be upper
        items = list(reversed(items))
        for item in items:
            editor.model().appendRow(item)

        index = 0
        if selected:
            index = selected.row()

        # Will trigger index-change signal
        editor.setCurrentIndex(index)
        self.first_run = False
        self.lock = True

    def setModelData(self, editor, model, index):
        """Apply the integer version back in the model"""
        version = editor.itemData(editor.currentIndex())
        model.setData(index, version["name"])


def pretty_date(t, now=None, strftime="%b %d %Y %H:%M"):
    """Parse datetime to readable timestamp

    Within first ten seconds:
        - "just now",
    Within first minute ago:
        - "%S seconds ago"
    Within one hour ago:
        - "%M minutes ago".
    Within one day ago:
        - "%H:%M hours ago"
    Else:
        "%Y-%m-%d %H:%M:%S"

    """

    assert isinstance(t, datetime)
    if now is None:
        now = datetime.now()
    assert isinstance(now, datetime)
    diff = now - t

    second_diff = diff.seconds
    day_diff = diff.days

    # future (consider as just now)
    if day_diff < 0:
        return "just now"

    # history
    if day_diff == 0:
        if second_diff < 10:
            return "just now"
        if second_diff < 60:
            return str(second_diff) + " seconds ago"
        if second_diff < 120:
            return "a minute ago"
        if second_diff < 3600:
            return str(second_diff // 60) + " minutes ago"
        if second_diff < 86400:
            minutes = (second_diff % 3600) // 60
            hours = second_diff // 3600
            return "{0}:{1:02d} hours ago".format(hours, minutes)

    return t.strftime(strftime)


def pretty_timestamp(t, now=None):
    """Parse timestamp to user readable format

    >>> pretty_timestamp("20170614T151122Z", now="20170614T151123Z")
    'just now'

    >>> pretty_timestamp("20170614T151122Z", now="20170614T171222Z")
    '2:01 hours ago'

    Args:
        t (str): The time string to parse.
        now (str, optional)

    Returns:
        str: human readable "recent" date.

    """

    if now is not None:
        try:
            now = time.strptime(now, "%Y%m%dT%H%M%SZ")
            now = datetime.fromtimestamp(time.mktime(now))
        except ValueError as e:
            log.warning("Can't parse 'now' time format: {0} {1}".format(t, e))
            return None

    if isinstance(t, float):
        dt = datetime.fromtimestamp(t)
    else:
        # Parse the time format as if it is `str` result from
        # `pyblish.lib.time()` which usually is stored in Avalon database.
        try:
            t = time.strptime(t, "%Y%m%dT%H%M%SZ")
        except ValueError as e:
            log.warning("Can't parse time format: {0} {1}".format(t, e))
            return None
        dt = datetime.fromtimestamp(time.mktime(t))

    # prettify
    return pretty_date(dt, now=now)


class PrettyTimeDelegate(QtWidgets.QStyledItemDelegate):
    """A delegate that displays a timestamp as a pretty date.

    This displays dates like `pretty_date`.

    """

    def displayText(self, value, locale):

        if value is None:
            # Ignore None value
            return

        return pretty_timestamp(value)