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annotationLayer.js
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annotationLayer.js
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var inherit = require('./inherit');
var featureLayer = require('./featureLayer');
var geo_annotation = require('./annotation');
var geo_event = require('./event');
var registry = require('./registry');
var transform = require('./transform');
var $ = require('jquery');
var Mousetrap = require('mousetrap');
var textFeature = require('./textFeature');
/**
* Object specification for an annotation layer.
*
* @typedef {geo.layer.spec} geo.annotationLayer.spec
* @extends {geo.layer.spec}
* @property {number} [dblClickTime=300] The delay in milliseconds that is
* treated as a double-click when working with annotations.
* @property {number} [adjacentPointProximity=5] The minimum distance in
* display coordinates (pixels) between two adjacent points when creating a
* polygon or line. A value of 0 requires an exact match.
* @property {number} [continuousPointProximity=5] The minimum distance in
* display coordinates (pixels) between two adjacent points when dragging
* to create an annotation. `false` disables continuous drawing mode.
* @property {number} [continuousPointCollinearity=1.0deg] The minimum angle
* between a series of three points when dragging to not interpret them as
* collinear. Only applies if `continuousPointProximity` is not `false`.
* @property {number} [continuousCloseProximity=10] The minimum distance in
* display coordinates (pixels) to close a polygon or end drawing a line when
* dragging to create an annotation. `false` never closes at the end of a
* drag. `true` is effectively infinite.
* @property {number} [finalPointProximity=10] The maximum distance in display
* coordinates (pixels) between the starting point and the mouse coordinates
* to signal closing a polygon. A value of 0 requires an exact match. A
* negative value disables closing a polygon by clicking on the start point.
* @property {boolean} [showLabels=true] Truthy to show feature labels that are
* allowed by the associated feature to be shown.
* @property {boolean} [clickToEdit=false] Truthy to allow clicking an
* annotation to place it in edit mode.
* @property {geo.textFeature.styleSpec} [defaultLabelStyle] Default styles for
* labels.
*/
/**
* @typedef {object} geo.annotationLayer.labelRecord
* @property {string} text The text of the label
* @property {geo.geoPosition} position The position of the label in map gcs
* coordinates.
* @property {geo.textFeature.styleSpec} [style] A {@link geo.textFeature}
* style object.
*/
/**
* @typedef {geo.util.polyop.spec} geo.util.polyop.annotationLayerSpec
* @extends {geo.util.polyop.spec}
* @property {string} [keepAnnotations='exact'] Determine which annotations are
* present after a boolean operation. `'exact'` replaces modified
* annotations with the results; unmodified annotations are left as is.
* `'all'` replaces all annotations, so unchanged annotations may be
* converted to polygonAnnotations. `'none'` discards all existing
* annotations and only keeps modified results.
*/
/**
* Layer to handle direct interactions with different features. Annotations
* (features) can be created by calling mode(<name of feature>) or cancelled
* with mode(null). There is also an "edit" mode which is used when modifying
* an annotation.
*
* @class
* @alias geo.annotationLayer
* @extends geo.featureLayer
* @param {geo.annotationLayer.spec} [arg] Specification for the new layer.
* @returns {geo.annotationLayer}
* @fires geo.event.annotation.state
* @fires geo.event.annotation.coordinates
* @fires geo.event.annotation.edit_action
* @fires geo.event.annotation.select_edit_handle
*/
var annotationLayer = function (arg) {
'use strict';
if (!(this instanceof annotationLayer)) {
return new annotationLayer(arg);
}
featureLayer.call(this, arg);
var mapInteractor = require('./mapInteractor');
var timestamp = require('./timestamp');
var util = require('./util');
var m_this = this,
s_init = this._init,
s_exit = this._exit,
s_draw = this.draw,
s_update = this._update,
m_buildTime = timestamp(),
m_options,
m_mode = null,
m_annotations = [],
m_features = [],
m_labelFeature,
m_labelLayer,
m_keyHandler;
var geojsonStyleProperties = {
closed: {dataType: 'boolean', keys: ['closed', 'close']},
fill: {dataType: 'boolean', keys: ['fill']},
fillColor: {dataType: 'color', keys: ['fillColor', 'fill-color', 'marker-color', 'fill']},
fillOpacity: {dataType: 'opacity', keys: ['fillOpacity', 'fill-opacity']},
lineCap: {dataType: 'text', keys: ['lineCap', 'line-cap']},
lineJoin: {dataType: 'text', keys: ['lineJoin', 'line-join']},
radius: {dataType: 'positive', keys: ['radius']},
scaled: {dataType: 'booleanOrNumber', keys: ['scaled']},
stroke: {dataType: 'boolean', keys: ['stroke']},
strokeColor: {dataType: 'color', keys: ['strokeColor', 'stroke-color', 'stroke']},
strokeOffset: {dataType: 'number', keys: ['strokeOffset', 'stroke-offset']},
strokeOpacity: {dataType: 'opacity', keys: ['strokeOpacity', 'stroke-opacity']},
strokeWidth: {dataType: 'positive', keys: ['strokeWidth', 'stroke-width']}
};
var textFeatureDataTypes = {
offset: 'coordinate2',
rotateWithMap: 'boolean',
rotation: 'angle',
scaleWithMap: 'boolean',
scale: 'booleanOrNumber',
shadowBlur: 'numberOrBlank',
shadowOffset: 'coordinate2',
strokeWidth: 'numberOrBlank',
visible: 'boolean'
};
textFeature.usedStyles.forEach(function (key) {
geojsonStyleProperties[key] = {
option: 'labelStyle',
dataType: textFeatureDataTypes[key] || 'text',
keys: [
key,
'label' + key.charAt(0).toUpperCase() + key.slice(1),
key.replace(/([A-Z])/g, '-$1').toLowerCase(),
'label-' + key.replace(/([A-Z])/g, '-$1').toLowerCase()]
};
});
m_options = $.extend(true, {}, {
dblClickTime: 300,
adjacentPointProximity: 5, // in pixels, 0 is exact
// in pixels; set to continuousPointProximity to false to disable
// continuous drawing modes.
continuousPointProximity: 5,
// in radians, minimum angle between continuous points to interpret them as
// being collinear
continuousPointCollinearity: 1.0 * Math.PI / 180,
continuousCloseProximity: 10, // in pixels, 0 is exact
finalPointProximity: 10, // in pixels, 0 is exact
showLabels: true,
clickToEdit: false
}, arg);
/**
* Process an action event. If we are in rectangle-creation mode, this
* creates a rectangle.
*
* @param {geo.event} evt The selection event.
* @fires geo.event.annotation.edit_action
*/
this._processAction = function (evt) {
var update;
if (evt.state && evt.state.actionRecord &&
evt.state.actionRecord.owner === geo_annotation.actionOwner &&
m_this.currentAnnotation) {
switch (m_this.mode()) {
case m_this.modes.edit:
update = m_this.currentAnnotation.processEditAction(evt);
if (m_this.currentAnnotation &&
m_this.currentAnnotation._editHandle &&
m_this.currentAnnotation._editHandle.handle) {
m_this.geoTrigger(geo_event.annotation.edit_action, {
annotation: m_this.currentAnnotation,
handle: m_this.currentAnnotation._editHandle ? m_this.currentAnnotation._editHandle.handle : undefined,
action: evt.event
});
if (evt.event === geo_event.actionup) {
m_this._selectEditHandle(
{data: m_this.currentAnnotation._editHandle.handle},
m_this.currentAnnotation._editHandle.handle.selected);
}
}
break;
case m_this.modes.cursor:
m_this.currentAnnotation._cursorHandleMousemove(evt.mouse);
update = m_this.currentAnnotation.processAction(evt);
m_this.geoTrigger(geo_event.annotation.cursor_action, {
annotation: m_this.currentAnnotation,
operation: m_this.currentBooleanOperation(),
evt: evt
});
break;
default:
update = m_this.currentAnnotation.processAction(evt);
break;
}
}
m_this._updateFromEvent(update);
};
/**
* Check if there is a current boolean operation.
*
* @returns {string?} Either undefined for no current boolean operation or
* the name of the operation.
*/
this.currentBooleanOperation = function () {
let op;
if (m_this._currentBooleanClass) {
op = m_this._currentBooleanClass.split('-')[1];
}
return op;
};
/**
* Check if the map is currently in a mode where we are adding an annotation
* with a boolean operation. If so, remove the current annotation from the
* layer, then apply it via the boolean operation.
*/
this._handleBooleanOperation = function () {
const op = m_this.currentBooleanOperation();
if (!op || !m_this.currentAnnotation || !m_this.currentAnnotation.toPolygonList) {
return;
}
const newAnnot = m_this.currentAnnotation;
m_this.removeAnnotation(m_this.currentAnnotation, false);
if (m_this.annotations().length || (op !== 'difference' && op !== 'intersect')) {
const evt = {
annotation: newAnnot,
operation: op
};
m_this.geoTrigger(geo_event.annotation.boolean, evt);
if (evt.cancel !== false) {
util.polyops[op](m_this, newAnnot.toPolygonList(), {correspond: {}, keepAnnotations: 'exact', style: m_this});
}
}
};
/**
* Handle updating the current annotation based on an update state.
*
* @param {string|undefined} update Truthy to update. `'done'` if the
* annotation was completed and the mode should return to `null`.
* `'remove'` to remove the current annotation and set the mode to `null`.
* Falsy to do nothing.
*/
this._updateFromEvent = function (update) {
switch (update) {
case 'remove':
m_this.removeAnnotation(m_this.currentAnnotation, false);
m_this.mode(null);
break;
case 'done':
m_this._handleBooleanOperation();
m_this.mode(null);
break;
}
if (update) {
m_this.modified();
m_this.draw();
}
};
/**
* Check the state of the modifier keys and apply them if appropriate.
*
* @param {geo.event} evt The mouse move or click event.
*/
this._handleMouseMoveModifiers = function (evt) {
if (m_this.mode() !== m_this.modes.edit && m_this.currentAnnotation.options('allowBooleanOperations') && (m_this.currentAnnotation._coordinates().length < 2 || m_this.mode() === m_this.modes.cursor)) {
if (evt.modifiers) {
const mod = (evt.modifiers.shift ? 's' : '') + (evt.modifiers.ctrl ? 'c' : '') + (evt.modifiers.meta || evt.modifiers.alt ? 'a' : '');
if (m_this._currentBooleanClass === m_this._booleanClasses[mod]) {
return;
}
m_this._currentBooleanClass = m_this._booleanClasses[mod];
const mapNode = m_this.map().node();
Object.values(m_this._booleanClasses).forEach((c) => {
mapNode.toggleClass(c, m_this._booleanClasses[mod] === c);
});
}
}
};
/**
* Handle mouse movement. If there is a current annotation, the movement
* event is sent to it.
*
* @param {geo.event} evt The mouse move event.
*/
this._handleMouseMove = function (evt) {
if (m_this.mode() && m_this.currentAnnotation) {
m_this._handleMouseMoveModifiers(evt);
var update = m_this.currentAnnotation.mouseMove(evt);
if (update) {
m_this.modified();
m_this.draw();
}
}
};
/**
* Select or deselect an edit handle.
*
* @param {geo.event} evt The mouse move event.
* @param {boolean} enable Truthy to select the handle, falsy to deselect it.
* @returns {this}
*/
this._selectEditHandle = function (evt, enable) {
if (!evt.data || !evt.data.editHandle) {
return;
}
$.each(m_features[geo_annotation._editHandleFeatureLevel], function (type, feature) {
feature.feature.modified();
});
m_this.currentAnnotation.selectEditHandle(evt.data, enable);
m_this.draw();
m_this.map().node().toggleClass('annotation-input', !!enable);
m_this.map().interactor().removeAction(
undefined, undefined, geo_annotation.actionOwner);
if (enable) {
var actions = m_this.currentAnnotation.actions(geo_annotation.state.edit);
$.each(actions, function (idx, action) {
m_this.map().interactor().addAction(action);
});
}
return m_this;
};
/**
* Handle mouse on events. If there is no current annotation and
* clickToEdit is enabled, any hovered annotation is highlighted.
* event is sent to it.
*
* @param {geo.event} evt The mouse move event.
*/
this._handleMouseOn = function (evt) {
if (!evt.data || !evt.data.annotation) {
return;
}
if (m_this.mode() === m_this.modes.edit && m_this.currentAnnotation) {
m_this._selectEditHandle(evt, true);
return;
}
if (m_this.mode() || m_this.currentAnnotation || !m_this.options('clickToEdit')) {
return;
}
evt.data.annotation.state(geo_annotation.state.highlight);
m_this.modified();
m_this.draw();
};
/**
* Handle mouse off events. If the specific annotation is in the highlight
* state, move it back to the done state.
*
* @param {geo.event} evt The mouse move event.
*/
this._handleMouseOff = function (evt) {
if (!evt.data || !evt.data.annotation) {
return;
}
if (m_this.mode() === m_this.modes.edit && evt.data.editHandle && evt.data.selected) {
m_this._selectEditHandle(evt, false);
return;
}
if (evt.data.annotation.state() === geo_annotation.state.highlight) {
evt.data.annotation.state(geo_annotation.state.done);
m_this.modified();
m_this.draw();
}
};
/**
* Handle mouse clicks. If there is a current annotation, the click event is
* sent to it.
*
* @param {geo.event} evt The mouse click event.
*/
this._handleMouseClick = function (evt) {
var retrigger = false, update;
if (m_this.mode() === m_this.modes.edit) {
if (m_this.map().interactor().hasAction(undefined, undefined, geo_annotation.actionOwner)) {
update = m_this.currentAnnotation.mouseClickEdit(evt);
m_this._updateFromEvent(update);
return;
}
m_this.mode(null);
m_this.draw();
$.each(m_features, function (idx, featureLevel) {
$.each(featureLevel, function (type, feature) {
feature.feature._clearSelectedFeatures();
});
});
retrigger = true;
} else if (m_this.mode() && m_this.currentAnnotation) {
m_this._handleMouseMoveModifiers(evt);
update = m_this.currentAnnotation.mouseClick(evt);
m_this._updateFromEvent(update);
retrigger = !m_this.mode();
if (m_this.mode() === m_this.modes.cursor) {
m_this.geoTrigger(geo_event.annotation.cursor_click, {
annotation: m_this.currentAnnotation,
operation: m_this.currentBooleanOperation(),
evt: evt
});
}
} else if (!m_this.mode() && !m_this.currentAnnotation && m_this.options('clickToEdit')) {
var highlighted = m_this.annotations().filter(function (ann) {
return ann.state() === geo_annotation.state.highlight;
});
if (highlighted.length !== 1) {
return;
}
m_this.mode(m_this.modes.edit, highlighted[0]);
m_this.draw();
retrigger = true;
}
if (retrigger) {
// retrigger mouse move to ensure the correct events are attached
m_this.map().interactor().retriggerMouseMove();
}
};
/**
* Set or get options.
*
* @param {string|object} [arg1] If `undefined`, return the options object.
* If a string, either set or return the option of that name. If an
* object, update the options with the object's values.
* @param {object} [arg2] If `arg1` is a string and this is defined, set
* the option to this value.
* @returns {object|this} If options are set, return the annotation,
* otherwise return the requested option or the set of options.
*/
this.options = function (arg1, arg2) {
if (arg1 === undefined) {
return m_options;
}
if (typeof arg1 === 'string' && arg2 === undefined) {
return m_options[arg1];
}
if (arg2 === undefined) {
m_options = $.extend(true, m_options, arg1);
} else {
m_options[arg1] = arg2;
}
m_this.modified();
return m_this;
};
/**
* Calculate the display distance for two coordinate in the current map.
*
* @param {geo.geoPosition|geo.screenPosition} coord1 The first coordinates.
* @param {string|geo.transform|null} gcs1 `undefined` to use the interface
* gcs, `null` to use the map gcs, `'display'` if the coordinates are
* already in display coordinates, or any other transform.
* @param {geo.geoPosition|geo.screenPosition} coord2 the second coordinates.
* @param {string|geo.transform|null} [gcs2] `undefined` to use the interface
* gcs, `null` to use the map gcs, `'display'` if the coordinates are
* already in display coordinates, or any other transform.
* @returns {number} the Euclidean distance between the two coordinates.
*/
this.displayDistance = function (coord1, gcs1, coord2, gcs2) {
var map = m_this.map();
if (gcs1 !== 'display') {
gcs1 = (gcs1 === null ? map.gcs() : (
gcs1 === undefined ? map.ingcs() : gcs1));
coord1 = map.gcsToDisplay(coord1, gcs1);
}
if (gcs2 !== 'display') {
gcs2 = (gcs2 === null ? map.gcs() : (
gcs2 === undefined ? map.ingcs() : gcs2));
coord2 = map.gcsToDisplay(coord2, gcs2);
}
var dist = Math.sqrt(Math.pow(coord1.x - coord2.x, 2) +
Math.pow(coord1.y - coord2.y, 2));
return dist;
};
/**
* Add an annotation to the layer. The annotation could be in any state.
*
* @param {geo.annotation} annotation The annotation to add.
* @param {string|geo.transform|null} [gcs] `undefined` to use the interface
* gcs, `null` to use the map gcs, or any other transform.
* @param {boolean} [update] If `false`, don't update the layer after adding
* the annotation.
* @returns {this} The current layer.
* @fires geo.event.annotation.add_before
* @fires geo.event.annotation.add
*/
this.addAnnotation = function (annotation, gcs, update) {
var pos = $.inArray(annotation, m_annotations);
if (pos < 0) {
while (m_this.annotationById(annotation.id())) {
annotation.newId();
}
m_this.geoTrigger(geo_event.annotation.add_before, {
annotation: annotation
});
m_annotations.push(annotation);
annotation.layer(m_this);
var map = m_this.map();
gcs = (gcs === null ? map.gcs() : (
gcs === undefined ? map.ingcs() : gcs));
if (gcs !== map.gcs()) {
annotation._convertCoordinates(gcs, map.gcs());
}
if (update !== false) {
m_this.modified();
m_this.draw();
}
m_this.geoTrigger(geo_event.annotation.add, {
annotation: annotation
});
}
return m_this;
};
/**
* Remove an annotation from the layer.
*
* @param {geo.annotation} annotation The annotation to remove.
* @param {boolean} [update] If `false`, don't update the layer after removing
* the annotation.
* @returns {boolean} `true` if an annotation was removed.
* @fires geo.event.annotation.remove
*/
this.removeAnnotation = function (annotation, update) {
var pos = $.inArray(annotation, m_annotations);
if (pos >= 0) {
if (annotation === m_this.currentAnnotation) {
m_this.currentAnnotation = null;
}
annotation._exit();
m_annotations.splice(pos, 1);
if (update !== false) {
m_this.modified();
m_this.draw();
}
m_this.geoTrigger(geo_event.annotation.remove, {
annotation: annotation
});
}
return pos >= 0;
};
/**
* Remove all annotations from the layer.
*
* @param {boolean} [skipCreating] If truthy, don't remove annotations that
* are in the create state.
* @param {boolean} [update] If `false`, don't update the layer after
* removing the annotation.
* @returns {number} The number of annotations that were removed.
*/
this.removeAllAnnotations = function (skipCreating, update) {
var removed = 0, annotation, pos = 0;
while (pos < m_annotations.length) {
annotation = m_annotations[pos];
if (skipCreating && annotation.state() === geo_annotation.state.create) {
pos += 1;
continue;
}
m_this.removeAnnotation(annotation, false);
removed += 1;
}
if (removed && update !== false) {
m_this.modified();
m_this.draw();
}
return removed;
};
/**
* Get the list of annotations on the layer.
*
* @returns {geo.annotation[]} An array of annotations.
*/
this.annotations = function () {
return m_annotations.slice();
};
/**
* Get an annotation by its id.
*
* @param {number} id The annotation ID.
* @returns {geo.annotation} The selected annotation or `undefined` if none
* matches the id.
*/
this.annotationById = function (id) {
if (id !== undefined && id !== null) {
id = +id; /* Cast to int */
}
var annotations = m_annotations.filter(function (annotation) {
return annotation.id() === id;
});
if (annotations.length) {
return annotations[0];
}
};
/* A list of special modes */
this.modes = {
edit: 'edit',
cursor: 'cursor'
};
/* Keys are short-hand for preferred event modifiers. Values are classes to
* apply to the map node. */
this._booleanClasses = {
s: 'annotation-union',
sc: 'annotation-intersect',
c: 'annotation-difference',
sa: 'annotation-xor'
};
/**
* Get or set the current mode.
*
* @param {string|null} [arg] `undefined` to get the current mode, `null` to
* stop creating/editing, `this.modes.edit` (`'edit'`) plus an annotation
* to switch to edit mode, `this.modes.cursor` plus an annotation to
* switch to using the annotation as a cursor, or the name of the type of
* annotation to create. Available annotations can listed via
* {@link geo.listAnnotations}.
* @param {geo.annotation} [editAnnotation] If `arg === this.modes.edit` or
* `arg === this.modes.cursor`, this is the annotation that should be
* edited or used.
* @param {object} [options] Additional options to pass when creating an
* annotation.
* @returns {string|null|this} The current mode or the layer.
* @fires geo.event.annotation.mode
*/
this.mode = function (arg, editAnnotation, options) {
if (arg === undefined) {
return m_mode;
}
if (arg !== m_mode ||
((arg === m_this.modes.edit || arg === m_this.modes.cursor) && editAnnotation !== m_this.editAnnotation) ||
(arg !== m_this.modes.edit && arg !== m_this.modes.cursor && arg && !m_this.currentAnnotation)
) {
var createAnnotation, actions,
mapNode = m_this.map().node(), oldMode = m_mode;
m_mode = arg;
mapNode.toggleClass('annotation-input', !!(m_mode && m_mode !== m_this.modes.edit && m_mode !== m_this.modes.cursor));
if (!m_mode || m_mode === m_this.modes.edit) {
Object.values(m_this._booleanClasses).forEach((c) => mapNode.toggleClass(c, false));
m_this._currentBooleanClass = undefined;
}
if (!m_keyHandler) {
m_keyHandler = Mousetrap(mapNode[0]);
}
if (m_mode) {
m_keyHandler.bind('esc', function () { m_this.mode(null); });
} else {
m_keyHandler.unbind('esc');
}
if (m_this.currentAnnotation) {
switch (m_this.currentAnnotation.state()) {
case geo_annotation.state.create:
m_this.removeAnnotation(m_this.currentAnnotation);
break;
case geo_annotation.state.edit:
m_this.currentAnnotation.state(geo_annotation.state.done);
m_this.modified();
m_this.draw();
break;
case geo_annotation.state.cursor:
m_this.currentAnnotation.state(geo_annotation.state.done);
m_this.modified();
m_this.draw();
m_this.map().node().toggleClass('annotation-cursor', false);
break;
}
m_this.currentAnnotation = null;
}
if (m_mode === m_this.modes.edit) {
m_this.currentAnnotation = editAnnotation;
m_this.currentAnnotation.state(geo_annotation.state.edit);
m_this.modified();
} else if (m_mode === m_this.modes.cursor) {
m_this.currentAnnotation = editAnnotation;
m_this.currentAnnotation.state(geo_annotation.state.cursor);
m_this.modified();
m_this.map().node().toggleClass('annotation-cursor', true);
actions = m_this.currentAnnotation.actions(geo_annotation.state.cursor);
} else if (registry.registries.annotations[m_mode]) {
createAnnotation = registry.registries.annotations[m_mode].func;
}
m_this.map().interactor().removeAction(
undefined, undefined, geo_annotation.actionOwner);
if (createAnnotation) {
options = $.extend({}, options || {}, {
state: geo_annotation.state.create,
layer: m_this
});
m_this.currentAnnotation = createAnnotation(options);
m_this.addAnnotation(m_this.currentAnnotation, null);
actions = m_this.currentAnnotation.actions(geo_annotation.state.create);
}
if (actions) {
$.each(actions, function (idx, action) {
m_this.map().interactor().addAction(action);
});
}
m_this.geoTrigger(geo_event.annotation.mode, {
mode: m_mode, oldMode: oldMode});
if (oldMode === m_this.modes.edit || oldMode === m_this.modes.cursor) {
m_this.modified();
}
}
return m_this;
};
/**
* Return the current set of annotations as a geojson object. Alternately,
* add a set of annotations from a geojson object.
*
* @param {string|object|File} [geojson] If present, add annotations based on
* the given geojson object. If `undefined`, return the current
* annotations as geojson. This may be a JSON string, a javascript
* object, or a File object.
* @param {boolean|string} [clear] If `true`, when adding annotations, first
* remove all existing objects. If `'update'`, update existing
* annotations and remove annotations that no longer exist. If falsy,
* update existing annotations and leave annotations that have not
* changed.
* @param {string|geo.transform|null} [gcs] `undefined` to use the interface
* gcs, `null` to use the map gcs, or any other transform.
* @param {boolean} [includeCrs] If truthy, include the coordinate system in
* the output.
* @returns {object|number|undefined} If `geojson` was undefined, the current
* annotations is a javascript object that can be converted to geojson
* using JSON.stringify. If `geojson` is specified, either the number of
* annotations now present upon success, or `undefined` if the value in
* `geojson` was not able to be parsed.
*/
this.geojson = function (geojson, clear, gcs, includeCrs) {
if (geojson !== undefined) {
var reader = registry.createFileReader('geojsonReader', {
layer: m_this,
lineStyle: require('./annotation/lineAnnotation').defaults.style,
pointStyle: require('./annotation/pointAnnotation').defaults.style,
polygonStyle: require('./annotation/polygonAnnotation').defaults.style
});
if (!reader.canRead(geojson)) {
return;
}
if (clear === true) {
m_this.removeAllAnnotations(true, false);
}
if (clear === 'update') {
$.each(m_this.annotations(), function (idx, annotation) {
annotation.options('updated', false);
});
}
reader.read(geojson, function (features) {
$.each(features.slice(), function (feature_idx, feature) {
m_this._geojsonFeatureToAnnotation(feature, gcs);
m_this.deleteFeature(feature);
});
});
if (clear === 'update') {
$.each(m_this.annotations(), function (idx, annotation) {
if (annotation.options('updated') === false &&
annotation.state() === geo_annotation.state.done) {
m_this.removeAnnotation(annotation, false);
}
});
}
m_this.modified();
m_this.draw();
return m_annotations.length;
}
geojson = null;
var features = [];
$.each(m_annotations, function (annotation_idx, annotation) {
var obj = annotation.geojson(gcs, includeCrs);
if (obj) {
features.push(obj);
}
});
if (features.length) {
geojson = {
type: 'FeatureCollection',
features: features
};
}
return geojson;
};
/**
* Convert a feature as parsed by the geojson reader into one or more
* annotations.
*
* @param {geo.feature} feature The feature to convert.
* @param {string|geo.transform|null} [gcs] `undefined` to use the interface
* gcs, `null` to use the map gcs, or any other transform.
* @fires geo.event.annotation.update
*/
this._geojsonFeatureToAnnotation = function (feature, gcs) {
var dataList = feature.data(),
annotationList = registry.listAnnotations(),
map = m_this.map();
gcs = (gcs === null ? map.gcs() : (
gcs === undefined ? map.ingcs() : gcs));
$.each(dataList, function (data_idx, data) {
var type = (data.properties || {}).annotationType || feature.featureType,
options = $.extend({}, data.properties || {}),
position, datagcs, i, existing;
if ($.inArray(type, annotationList) < 0) {
return;
}
options.style = options.style || {};
options.labelStyle = options.labelStyle || {};
delete options.annotationType;
// the geoJSON reader can emit line, polygon, point, and marker
switch (feature.featureType) {
case 'line':
position = feature.line()(data, data_idx);
if (!position || position.length < 2) {
return;
}
// make a copy of the position array to avoid mutating the original.
position = position.slice();
break;
case 'polygon':
position = feature.polygon()(data, data_idx);
if (!position || !position.outer || position.outer.length < 3) {
return;
}
// make a copy of the position array to avoid mutating the original.
position = {
outer: position.outer.slice(),
inner: (position.inner || []).map((h) => h.slice())
};
if (position.outer[position.outer.length - 1][0] === position.outer[0][0] &&
position.outer[position.outer.length - 1][1] === position.outer[0][1]) {
position.outer.splice(position.outer.length - 1, 1);
if (position.outer.length < 3) {
return;
}
}
position.inner.forEach((h) => {
if (h.length > 3 && h[h.length - 1][0] === h[0][0] && h[h.length - 1][1] === h[0][1]) {
h.splice(h.length - 1, 1);
}
});
if (!position.inner || !position.inner.length) {
position = position.outer;
}
break;
case 'marker':
position = data.geometry.coordinates[0].slice(0, 4);
break;
case 'point':
position = [feature.position()(data, data_idx)];
break;
}
datagcs = ((data.crs && data.crs.type === 'name' && data.crs.properties &&
data.crs.properties.type === 'proj4' &&
data.crs.properties.name) ? data.crs.properties.name : gcs);
[position.outer || position].concat(position.inner || []).forEach((poslist) => {
for (i = 0; i < poslist.length; i += 1) {
poslist[i] = util.normalizeCoordinates(poslist[i]);
}
if (datagcs !== map.gcs()) {
const transposlist = transform.transformCoordinates(datagcs, map.gcs(), poslist);
for (i = 0; i < poslist.length; i += 1) {
poslist[i] = transposlist[i];
}
}
});
options.coordinates = position;
/* For each style listed in the geojsonStyleProperties object, check if
* is given under any of the variety of keys as a valid instance of the
* required data type. If not, use the property from the feature. */
$.each(geojsonStyleProperties, function (key, prop) {
var value;
$.each(prop.keys, function (idx, altkey) {
if (value === undefined) {
value = m_this.validateAttribute(options[altkey], prop.dataType);
}
});
if (value === undefined) {
value = m_this.validateAttribute(
feature.style.get(key)(data, data_idx), prop.dataType);
}
if (value !== undefined) {
options[prop.option || 'style'][key] = value;
}
});
/* Delete property keys we have used */
$.each(geojsonStyleProperties, function (key, prop) {
$.each(prop.keys, function (idx, altkey) {
delete options[altkey];
});
});
if (options.annotationId !== undefined) {
existing = m_this.annotationById(options.annotationId);
if (existing) {
delete options.annotationId;
}
}
if (existing && existing.type() === type && existing.state() === geo_annotation.state.done && existing.options('updated') === false) {
/* We could change the state of the existing annotation if it differs
* from done. */
delete options.state;
delete options.layer;
options.updated = true;
existing.options(options);
m_this.geoTrigger(geo_event.annotation.update, {
annotation: existing
});
} else {
options.state = geo_annotation.state.done;
options.layer = m_this;
options.updated = 'new';
m_this.addAnnotation(registry.createAnnotation(type, options), null);
}
});
};
/**
* Validate a value for an attribute based on a specified data type. This
* returns a sanitized value or `undefined` if the value was invalid. Data
* types include:
* - `color`: a css string, `#rrggbb` hex string, `#rgb` hex string, number,
* or object with r, g, b properties in the range of [0-1].
* - `opacity`: a floating point number in the range [0, 1].
* - `positive`: a floating point number greater than zero.
* - `boolean`: a string whose lowercase value is `'false'`, `'off'`, or
* `'no'`, and falsy values are false, all else is true. `null` and
* `undefined` are still considered invalid values.
* - `booleanOrNumber`: a string whose lowercase value is `'false'`, `'off'`,
* `'no'`, `'true'`, `'on'`, or `'yes'`, falsy values that aren't 0, and
* `true` are handled as booleans. Otherwise, a floating point number that
* isn't NaN or an infinity.
* - `coordinate2`: either an object with x and y properties that are
* numbers, or a string of the form <x>[,]<y> with optional whitespace, or
* a JSON encoded object with x and y values, or a JSON encoded list of at
* leasst two numbers.
* - `number`: a floating point number that isn't NaN or an infinity.
* - `angle`: a number that represents radians. If followed by one of `deg`,
* `grad`, or `turn`, it is converted to radians. An empty string is also
* allowed.
* - `text`: any text string.
* @param {number|string|object|boolean} value The value to validate.
* @param {string} dataType The data type for validation.
* @returns {number|string|object|boolean|undefined} The sanitized value or
* `undefined`.
*/
this.validateAttribute = function (value, dataType) {
var parts;
if (value === undefined || value === null) {
return;
}
switch (dataType) {
case 'angle':
if (value === '') {
break;
}
parts = /^\s*([-.0-9eE]+)\s*(deg|rad|grad|turn)?\s*$/.exec(('' + value).toLowerCase());
if (!parts || !isFinite(parts[1])) {
return;
}
var factor = (parts[2] === 'grad' ? Math.PI / 200 :
(parts[2] === 'deg' ? Math.PI / 180 :
(parts[2] === 'turn' ? 2 * Math.PI : 1)));
value = +parts[1] * factor;
break;
case 'boolean':
value = !!value && ['false', 'no', 'off'].indexOf(('' + value).toLowerCase()) < 0;
break;
case 'booleanOrNumber':
if ((!value && value !== 0 && value !== '') || ['true', 'false', 'off', 'on', 'no', 'yes'].indexOf(('' + value).toLowerCase()) >= 0) {
value = !!value && ['false', 'no', 'off'].indexOf(('' + value).toLowerCase()) < 0;
} else {
if (!util.isNonNullFinite(value)) {
return;
}
value = +value;
}
break;
case 'coordinate2':
if (value === '') {
break;
}
if (value && util.isNonNullFinite(value.x) && util.isNonNullFinite(value.y)) {
value.x = +value.x;
value.y = +value.y;
break;
}