# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QGIS
Date : May 23, 2011
copyright : (C) 2011 by Giuseppe Sucameli
email : brush.tyler@gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
from builtins import str
# this will disable the dbplugin if the connector raise an ImportError
from .connector import SpatiaLiteDBConnector
from qgis.PyQt.QtCore import Qt, QFileInfo, QCoreApplication
from qgis.PyQt.QtGui import QIcon
from qgis.PyQt.QtWidgets import QApplication, QAction, QFileDialog
from qgis.core import Qgis, QgsApplication, QgsDataSourceUri, QgsSettings
from qgis.gui import QgsMessageBar
from ..plugin import DBPlugin, Database, Table, VectorTable, RasterTable, TableField, TableIndex, TableTrigger, \
InvalidDataException
def classFactory():
return SpatiaLiteDBPlugin
class SpatiaLiteDBPlugin(DBPlugin):
@classmethod
def icon(self):
return QgsApplication.getThemeIcon("/mIconSpatialite.svg")
@classmethod
def typeName(self):
return 'spatialite'
@classmethod
def typeNameString(self):
return QCoreApplication.translate('db_manager', 'SpatiaLite')
@classmethod
def providerName(self):
return 'spatialite'
@classmethod
def connectionSettingsKey(self):
return '/SpatiaLite/connections'
def databasesFactory(self, connection, uri):
return SLDatabase(connection, uri)
def connect(self, parent=None):
conn_name = self.connectionName()
settings = QgsSettings()
settings.beginGroup(u"/%s/%s" % (self.connectionSettingsKey(), conn_name))
if not settings.contains("sqlitepath"): # non-existent entry?
raise InvalidDataException(self.tr(u'There is no defined database connection "{0}".').format(conn_name))
database = settings.value("sqlitepath")
uri = QgsDataSourceUri()
uri.setDatabase(database)
return self.connectToUri(uri)
@classmethod
def addConnection(self, conn_name, uri):
settings = QgsSettings()
settings.beginGroup(u"/%s/%s" % (self.connectionSettingsKey(), conn_name))
settings.setValue("sqlitepath", uri.database())
return True
@classmethod
def addConnectionActionSlot(self, item, action, parent, index):
QApplication.restoreOverrideCursor()
try:
filename, selected_filter = QFileDialog.getOpenFileName(parent, "Choose SQLite/SpatiaLite file")
if not filename:
return
finally:
QApplication.setOverrideCursor(Qt.WaitCursor)
conn_name = QFileInfo(filename).fileName()
uri = QgsDataSourceUri()
uri.setDatabase(filename)
self.addConnection(conn_name, uri)
index.internalPointer().itemChanged()
class SLDatabase(Database):
def __init__(self, connection, uri):
Database.__init__(self, connection, uri)
def connectorsFactory(self, uri):
return SpatiaLiteDBConnector(uri)
def dataTablesFactory(self, row, db, schema=None):
return SLTable(row, db, schema)
def vectorTablesFactory(self, row, db, schema=None):
return SLVectorTable(row, db, schema)
def rasterTablesFactory(self, row, db, schema=None):
return SLRasterTable(row, db, schema)
def info(self):
from .info_model import SLDatabaseInfo
return SLDatabaseInfo(self)
def sqlResultModel(self, sql, parent):
from .data_model import SLSqlResultModel
return SLSqlResultModel(self, sql, parent)
def sqlResultModelAsync(self, sql, parent):
from .data_model import SLSqlResultModelAsync
return SLSqlResultModelAsync(self, sql, parent)
def registerDatabaseActions(self, mainWindow):
action = QAction(self.tr("Run &Vacuum"), self)
mainWindow.registerAction(action, self.tr("&Database"), self.runVacuumActionSlot)
Database.registerDatabaseActions(self, mainWindow)
def runVacuumActionSlot(self, item, action, parent):
QApplication.restoreOverrideCursor()
try:
if not isinstance(item, (DBPlugin, Table)) or item.database() is None:
parent.infoBar.pushMessage(self.tr("No database selected or you are not connected to it."),
Qgis.Info, parent.iface.messageTimeout())
return
finally:
QApplication.setOverrideCursor(Qt.WaitCursor)
self.runVacuum()
def runVacuum(self):
self.database().aboutToChange.emit()
self.database().connector.runVacuum()
self.database().refresh()
def runAction(self, action):
action = str(action)
if action.startswith("vacuum/"):
if action == "vacuum/run":
self.runVacuum()
return True
return Database.runAction(self, action)
def uniqueIdFunction(self):
return None
def explicitSpatialIndex(self):
return True
def spatialIndexClause(self, src_table, src_column, dest_table, dest_column):
return u""" "%s".ROWID IN (\nSELECT ROWID FROM SpatialIndex WHERE f_table_name='%s' AND search_frame="%s"."%s") """ % (src_table, src_table, dest_table, dest_column)
def supportsComment(self):
return False
class SLTable(Table):
def __init__(self, row, db, schema=None):
Table.__init__(self, db, None)
self.name, self.isView, self.isSysTable = row
def ogrUri(self):
ogrUri = u"%s|layername=%s" % (self.uri().database(), self.name)
return ogrUri
def mimeUri(self):
return Table.mimeUri(self)
def toMapLayer(self):
from qgis.core import QgsVectorLayer
provider = self.database().dbplugin().providerName()
uri = self.uri().uri()
return QgsVectorLayer(uri, self.name, provider)
def tableFieldsFactory(self, row, table):
return SLTableField(row, table)
def tableIndexesFactory(self, row, table):
return SLTableIndex(row, table)
def tableTriggersFactory(self, row, table):
return SLTableTrigger(row, table)
def tableDataModel(self, parent):
from .data_model import SLTableDataModel
return SLTableDataModel(self, parent)
class SLVectorTable(SLTable, VectorTable):
def __init__(self, row, db, schema=None):
SLTable.__init__(self, row[:-5], db, schema)
VectorTable.__init__(self, db, schema)
# SpatiaLite does case-insensitive checks for table names, but the
# SL provider didn't do the same in Qgis < 1.9, so self.geomTableName
# stores the table name like stored in the geometry_columns table
self.geomTableName, self.geomColumn, self.geomType, self.geomDim, self.srid = row[-5:]
def uri(self):
uri = self.database().uri()
uri.setDataSource('', self.geomTableName, self.geomColumn)
return uri
def hasSpatialIndex(self, geom_column=None):
geom_column = geom_column if geom_column is not None else self.geomColumn
return self.database().connector.hasSpatialIndex((self.schemaName(), self.name), geom_column)
def createSpatialIndex(self, geom_column=None):
self.aboutToChange.emit()
ret = VectorTable.createSpatialIndex(self, geom_column)
if ret is not False:
self.database().refresh()
return ret
def deleteSpatialIndex(self, geom_column=None):
self.aboutToChange.emit()
ret = VectorTable.deleteSpatialIndex(self, geom_column)
if ret is not False:
self.database().refresh()
return ret
def refreshTableEstimatedExtent(self):
return
def runAction(self, action):
if SLTable.runAction(self, action):
return True
return VectorTable.runAction(self, action)
class SLRasterTable(SLTable, RasterTable):
def __init__(self, row, db, schema=None):
SLTable.__init__(self, row[:-3], db, schema)
RasterTable.__init__(self, db, schema)
self.prefixName, self.geomColumn, self.srid = row[-3:]
self.geomType = 'RASTER'
# def info(self):
#from .info_model import SLRasterTableInfo
#return SLRasterTableInfo(self)
def rasterliteGdalUri(self):
gdalUri = u'RASTERLITE:%s,table=%s' % (self.uri().database(), self.prefixName)
return gdalUri
def mimeUri(self):
# QGIS has no provider to load rasters, let's use GDAL
uri = u"raster:gdal:%s:%s" % (self.name, self.uri().database())
return uri
def toMapLayer(self):
from qgis.core import QgsRasterLayer, QgsContrastEnhancement
# QGIS has no provider to load Rasterlite rasters, let's use GDAL
uri = self.rasterliteGdalUri()
rl = QgsRasterLayer(uri, self.name)
if rl.isValid():
rl.setContrastEnhancement(QgsContrastEnhancement.StretchToMinimumMaximum)
return rl
class SLTableField(TableField):
def __init__(self, row, table):
TableField.__init__(self, table)
self.num, self.name, self.dataType, self.notNull, self.default, self.primaryKey = row
self.hasDefault = self.default
class SLTableIndex(TableIndex):
def __init__(self, row, table):
TableIndex.__init__(self, table)
self.num, self.name, self.isUnique, self.columns = row
class SLTableTrigger(TableTrigger):
def __init__(self, row, table):
TableTrigger.__init__(self, table)
self.name, self.function = row