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| const CommonSelectors = require('../lib/common_selectors');
const mouseEventPoint = require('../lib/mouse_event_point');
const featuresAt = require('../lib/features_at');
const createSupplementaryPoints = require('../lib/create_supplementary_points');
const StringSet = require('../lib/string_set');
const doubleClickZoom = require('../lib/double_click_zoom');
const moveFeatures = require('../lib/move_features');
const Constants = require('../constants');
const MultiFeature = require('../feature_types/multi_feature');
module.exports = function(ctx, options = {}) {
let dragMoveLocation = null;
let boxSelectStartLocation = null;
let boxSelectElement;
let boxSelecting = false;
let canBoxSelect = false;
let dragMoving = false;
let canDragMove = false;
const initiallySelectedFeatureIds = options.featureIds || [];
const fireUpdate = function() {
ctx.map.fire(Constants.events.UPDATE, {
action: Constants.updateActions.MOVE,
features: ctx.store.getSelected().map(f => f.toGeoJSON())
});
};
const fireActionable = () => {
const selectedFeatures = ctx.store.getSelected();
const multiFeatures = selectedFeatures.filter(
feature => feature instanceof MultiFeature
);
let combineFeatures = false;
if (selectedFeatures.length > 1) {
combineFeatures = true;
const featureType = selectedFeatures[0].type.replace('Multi', '');
selectedFeatures.forEach(feature => {
if (feature.type.replace('Multi', '') !== featureType) {
combineFeatures = false;
}
});
}
const uncombineFeatures = multiFeatures.length > 0;
const trash = selectedFeatures.length > 0;
ctx.events.actionable({
combineFeatures, uncombineFeatures, trash
});
};
const getUniqueIds = function(allFeatures) {
if (!allFeatures.length) return [];
const ids = allFeatures.map(s => s.properties.id)
.filter(id => id !== undefined)
.reduce((memo, id) => {
memo.add(id);
return memo;
}, new StringSet());
return ids.values();
};
const stopExtendedInteractions = function() {
if (boxSelectElement) {
Eif (boxSelectElement.parentNode) boxSelectElement.parentNode.removeChild(boxSelectElement);
boxSelectElement = null;
}
ctx.map.dragPan.enable();
boxSelecting = false;
canBoxSelect = false;
dragMoving = false;
canDragMove = false;
};
return {
stop: function() {
doubleClickZoom.enable(ctx);
},
start: function() {
// Select features that should start selected,
// probably passed in from a `draw_*` mode
if (ctx.store) {
ctx.store.setSelected(initiallySelectedFeatureIds.filter(id => {
return ctx.store.get(id) !== undefined;
}));
fireActionable();
}
// Any mouseup should stop box selecting and dragMoving
this.on('mouseup', CommonSelectors.true, stopExtendedInteractions);
// On mousemove that is not a drag, stop extended interactions.
// This is useful if you drag off the canvas, release the button,
// then move the mouse back over the canvas --- we don't allow the
// interaction to continue then, but we do let it continue if you held
// the mouse button that whole time
this.on('mousemove', CommonSelectors.true, stopExtendedInteractions);
// As soon as you mouse leaves the canvas, update the feature
this.on('mouseout', () => dragMoving, fireUpdate);
// Click (with or without shift) on no feature
this.on('click', CommonSelectors.noTarget, function() {
// Clear the re-render selection
const wasSelected = ctx.store.getSelectedIds();
if (wasSelected.length) {
ctx.store.clearSelected();
wasSelected.forEach(id => this.render(id));
}
doubleClickZoom.enable(ctx);
stopExtendedInteractions();
});
// Click (with or without shift) on a vertex
this.on('click', CommonSelectors.isOfMetaType(Constants.meta.VERTEX), (e) => {
// Enter direct select mode
ctx.events.changeMode(Constants.modes.DIRECT_SELECT, {
featureId: e.featureTarget.properties.parent,
coordPath: e.featureTarget.properties.coord_path,
startPos: e.lngLat
});
ctx.ui.queueMapClasses({ mouse: Constants.cursors.MOVE });
});
// Mousedown on a selected feature
this.on('mousedown', CommonSelectors.isActiveFeature, function(e) {
// Stop any already-underway extended interactions
stopExtendedInteractions();
// Disable map.dragPan immediately so it can't start
ctx.map.dragPan.disable();
// Re-render it and enable drag move
this.render(e.featureTarget.properties.id);
// Set up the state for drag moving
canDragMove = true;
dragMoveLocation = e.lngLat;
});
// Click (with or without shift) on any feature
this.on('click', CommonSelectors.isFeature, function(e) {
// Stop everything
doubleClickZoom.disable(ctx);
stopExtendedInteractions();
const isShiftClick = CommonSelectors.isShiftDown(e);
const selectedFeatureIds = ctx.store.getSelectedIds();
const featureId = e.featureTarget.properties.id;
const isFeatureSelected = ctx.store.isSelected(featureId);
// Click (without shift) on any selected feature but a point
if (!isShiftClick && isFeatureSelected && ctx.store.get(featureId).type !== Constants.geojsonTypes.POINT) {
// Enter direct select mode
return ctx.events.changeMode(Constants.modes.DIRECT_SELECT, {
featureId: featureId
});
}
// Shift-click on a selected feature
if (isFeatureSelected && isShiftClick) {
// Deselect it
ctx.store.deselect(featureId);
ctx.ui.queueMapClasses({ mouse: Constants.cursors.POINTER });
if (selectedFeatureIds.length === 1) E{
doubleClickZoom.enable(ctx);
}
// Shift-click on an unselected feature
} else if (!isFeatureSelected && isShiftClick) {
// Add it to the selection
ctx.store.select(featureId);
ctx.ui.queueMapClasses({ mouse: Constants.cursors.MOVE });
// Click (without shift) on an unselected feature
} else if (!isFeatureSelected && !isShiftClick) E{
// Make it the only selected feature
selectedFeatureIds.forEach(this.render);
ctx.store.setSelected(featureId);
ctx.ui.queueMapClasses({ mouse: Constants.cursors.MOVE });
}
// No matter what, re-render the clicked feature
this.render(featureId);
});
// Dragging when drag move is enabled
this.on('drag', () => canDragMove, (e) => {
dragMoving = true;
e.originalEvent.stopPropagation();
const delta = {
lng: e.lngLat.lng - dragMoveLocation.lng,
lat: e.lngLat.lat - dragMoveLocation.lat
};
moveFeatures(ctx.store.getSelected(), delta);
dragMoveLocation = e.lngLat;
});
// Mouseup, always
this.on('mouseup', CommonSelectors.true, function(e) {
// End any extended interactions
if (dragMoving) {
fireUpdate();
} else if (boxSelecting) {
const bbox = [
boxSelectStartLocation,
mouseEventPoint(e.originalEvent, ctx.container)
];
const featuresInBox = featuresAt(null, bbox, ctx);
const idsToSelect = getUniqueIds(featuresInBox)
.filter(id => !ctx.store.isSelected(id));
if (idsToSelect.length) {
ctx.store.select(idsToSelect);
idsToSelect.forEach(this.render);
ctx.ui.queueMapClasses({ mouse: Constants.cursors.MOVE });
}
}
stopExtendedInteractions();
});
if (ctx.options.boxSelect) E{
// Shift-mousedown anywhere
this.on('mousedown', CommonSelectors.isShiftMousedown, (e) => {
stopExtendedInteractions();
ctx.map.dragPan.disable();
// Enable box select
boxSelectStartLocation = mouseEventPoint(e.originalEvent, ctx.container);
canBoxSelect = true;
});
// Drag when box select is enabled
this.on('drag', () => canBoxSelect, (e) => {
boxSelecting = true;
ctx.ui.queueMapClasses({ mouse: Constants.cursors.ADD });
// Create the box node if it doesn't exist
if (!boxSelectElement) {
boxSelectElement = document.createElement('div');
boxSelectElement.classList.add(Constants.classes.BOX_SELECT);
ctx.container.appendChild(boxSelectElement);
}
// Adjust the box node's width and xy position
const current = mouseEventPoint(e.originalEvent, ctx.container);
const minX = Math.min(boxSelectStartLocation.x, current.x);
const maxX = Math.max(boxSelectStartLocation.x, current.x);
const minY = Math.min(boxSelectStartLocation.y, current.y);
const maxY = Math.max(boxSelectStartLocation.y, current.y);
const translateValue = `translate(${minX}px, ${minY}px)`;
boxSelectElement.style.transform = translateValue;
boxSelectElement.style.WebkitTransform = translateValue;
boxSelectElement.style.width = `${maxX - minX}px`;
boxSelectElement.style.height = `${maxY - minY}px`;
});
}
},
render: function(geojson, push) {
geojson.properties.active = (ctx.store.isSelected(geojson.properties.id)) ?
Constants.activeStates.ACTIVE : Constants.activeStates.INACTIVE;
push(geojson);
fireActionable();
if (geojson.properties.active !== Constants.activeStates.ACTIVE ||
geojson.geometry.type === Constants.geojsonTypes.POINT) return;
createSupplementaryPoints(geojson).forEach(push);
},
trash: function() {
ctx.store.delete(ctx.store.getSelectedIds());
fireActionable();
},
combineFeatures: function() {
const selectedFeatures = ctx.store.getSelected();
if (selectedFeatures.length === 0 || selectedFeatures.length < 2) return;
const coordinates = [], featuresCombined = [];
const featureType = selectedFeatures[0].type.replace('Multi', '');
for (let i = 0; i < selectedFeatures.length; i++) {
const feature = selectedFeatures[i];
if (feature.type.replace('Multi', '') !== featureType) {
return;
}
if (feature.type.includes('Multi')) {
feature.getCoordinates().forEach((subcoords) => {
coordinates.push(subcoords);
});
} else {
coordinates.push(feature.getCoordinates());
}
featuresCombined.push(feature.toGeoJSON());
}
if (featuresCombined.length > 1) E{
const multiFeature = new MultiFeature(ctx, {
type: Constants.geojsonTypes.FEATURE,
properties: featuresCombined[0].properties,
geometry: {
type: `Multi${featureType}`,
coordinates: coordinates
}
});
ctx.store.add(multiFeature);
ctx.store.delete(ctx.store.getSelectedIds(), { silent: true });
ctx.store.setSelected([multiFeature.id]);
ctx.map.fire(Constants.events.COMBINE_FEATURES, {
createdFeatures: [multiFeature.toGeoJSON()],
deletedFeatures: featuresCombined
});
}
fireActionable();
},
uncombineFeatures: function() {
const selectedFeatures = ctx.store.getSelected();
if (selectedFeatures.length === 0) return;
const createdFeatures = [];
const featuresUncombined = [];
for (let i = 0; i < selectedFeatures.length; i++) {
const feature = selectedFeatures[i];
if (feature instanceof MultiFeature) {
feature.getFeatures().forEach((subFeature) => {
ctx.store.add(subFeature);
subFeature.properties = feature.properties;
createdFeatures.push(subFeature.toGeoJSON());
ctx.store.select([subFeature.id]);
});
ctx.store.delete(feature.id, { silent: true });
featuresUncombined.push(feature.toGeoJSON());
}
}
if (createdFeatures.length > 1) {
ctx.map.fire(Constants.events.UNCOMBINE_FEATURES, {
createdFeatures: createdFeatures,
deletedFeatures: featuresUncombined
});
}
fireActionable();
}
};
};
|