gristlabs_grist-core/app/client/components/ViewLayout.ts
Dmitry S 99ab09651e (core) Implement 'Print widget' option to print individual view sections.
Summary:
- Supports multi-page printing with some aggressive css overrides.
- Relies on a new function implemented by grist-plugin-api to print a
  multi-page CustomView.
- Renders all rows for printing for scrolly-based views.

Test Plan:
Doesn't seem possible to do a selenium test for printing. Tested
manually on Chrome, Firefox, and Safari.

Reviewers: paulfitz

Reviewed By: paulfitz

Differential Revision: https://phab.getgrist.com/D2635
2020-10-10 00:35:33 -04:00

273 lines
11 KiB
TypeScript

import * as BaseView from 'app/client/components/BaseView';
import {ChartView} from 'app/client/components/ChartView';
import * as commands from 'app/client/components/commands';
import {CustomView} from 'app/client/components/CustomView';
import * as DetailView from 'app/client/components/DetailView';
import * as GridView from 'app/client/components/GridView';
import {GristDoc} from 'app/client/components/GristDoc';
import {Layout} from 'app/client/components/Layout';
import {LayoutEditor} from 'app/client/components/LayoutEditor';
import {printViewSection} from 'app/client/components/Printing';
import {Delay} from 'app/client/lib/Delay';
import {createObsArray} from 'app/client/lib/koArrayWrap';
import {ViewRec, ViewSectionRec} from 'app/client/models/DocModel';
import {reportError} from 'app/client/models/errors';
import {viewSectionMenu} from 'app/client/ui/ViewSectionMenu';
import {testId} from 'app/client/ui2018/cssVars';
import {editableLabel} from 'app/client/ui2018/editableLabel';
import {DisposableWithEvents} from 'app/common/DisposableWithEvents';
import {mod} from 'app/common/gutil';
import {computedArray, Disposable, dom, fromKo, Holder, IDomComponent, subscribe} from 'grainjs';
import * as ko from 'knockout';
import * as _ from 'underscore';
// tslint:disable:no-console
const viewSectionTypes: {[key: string]: any} = {
record: GridView,
detail: DetailView,
chart: ChartView,
single: DetailView,
custom: CustomView,
};
function getInstanceConstructor(parentKey: string) {
const Cons = viewSectionTypes[parentKey];
if (!Cons) {
console.error('ViewLayout error: requested an unsupported section type:', parentKey);
}
// Default to GridView if no valid constructor
return Cons || viewSectionTypes.record;
}
class ViewSectionHelper extends Disposable {
private _instance = Holder.create<BaseView>(this);
constructor(gristDoc: GristDoc, vs: ViewSectionRec) {
super();
this.onDispose(() => vs.viewInstance(null));
this.autoDispose(subscribe((use) => {
// Rebuild the section when its type changes or its underlying table.
const table = use(vs.table);
const Cons = getInstanceConstructor(use(vs.parentKey));
this._instance.clear();
if (table.getRowId()) {
this._instance.autoDispose(Cons.create(gristDoc, vs));
}
vs.viewInstance(this._instance.get());
}));
}
}
/**
* ViewLayout - Handles layout for a single page.
*/
export class ViewLayout extends DisposableWithEvents implements IDomComponent {
public docModel = this.gristDoc.docModel;
public viewModel: ViewRec;
public layoutSpec: ko.Computed<object>;
private _freeze = false;
private _layout: any;
private _sectionIds: number[];
constructor(public readonly gristDoc: GristDoc, viewId: number) {
super();
this.viewModel = this.docModel.views.getRowModel(viewId);
// A Map from viewSection RowModels to corresponding View class instances.
// TODO add a test that creating / deleting a section creates/destroys one instance, and
// switching pages destroys all instances.
const viewSectionObs = createObsArray(this, this.viewModel.viewSections());
this.autoDispose(computedArray(viewSectionObs, (vs, i, compArr) =>
ViewSectionHelper.create(compArr, gristDoc, vs)));
// Update the stored layoutSpecObj with any missing fields that are present in viewFields.
this.layoutSpec = this.autoDispose(ko.computed(
() => this._updateLayoutSpecWithSections(this.viewModel.layoutSpecObj()))
.extend({rateLimit: 0}));
this._layout = this.autoDispose(Layout.create(this.layoutSpec(),
this._buildLeafContent.bind(this), true));
this._sectionIds = this._layout.getAllLeafIds();
// When the layoutSpec changes by some means other than the layout editor, rebuild.
// This includes adding/removing sections and undo/redo.
this.autoDispose(this.layoutSpec.subscribe((spec) => this._freeze || this._rebuildLayout(spec)));
const layoutSaveDelay = this.autoDispose(new Delay());
this.listenTo(this._layout, 'layoutUserEditStop', () => {
layoutSaveDelay.schedule(1000, () => {
if (!this._layout) { return; }
(this.viewModel.layoutSpecObj as any).setAndSave(this._layout.getLayoutSpec());
this._onResize();
});
});
// Do not save if the user has started editing again.
this.listenTo(this._layout, 'layoutUserEditStart', () => layoutSaveDelay.cancel());
this.autoDispose(LayoutEditor.create(this._layout));
// Add disposal of this._layout after layoutEditor, so that it gets disposed first, and
// layoutEditor doesn't attempt to update it in its own disposal logic.
this.onDispose(() => this._layout.dispose());
this.autoDispose(this.gristDoc.resizeEmitter.addListener(this._onResize, this));
// It's hard to detect a click or mousedown on a third-party iframe
// (See https://stackoverflow.com/questions/2381336/detect-click-into-iframe-using-javascript).
this.listenTo(this.gristDoc.app, 'clipboard_blur', this._maybeFocusInSection);
const commandGroup = {
deleteSection: () => { this._removeViewSection(this.viewModel.activeSectionId()); },
nextSection: () => { this._otherSection(+1); },
prevSection: () => { this._otherSection(-1); },
printSection: () => { printViewSection(this._layout, this.viewModel.activeSection()).catch(reportError); },
};
this.autoDispose(commands.createGroup(commandGroup, this, true));
}
public buildDom() {
return this._layout.rootElem;
}
// Freezes the layout until the passed in promise resolves. This is useful to achieve a single
// layout rebuild when multiple user actions needs to apply, simply pass in a promise that resolves
// when all user actions have resolved.
public async freezeUntil(promise: Promise<unknown>): Promise<void> {
this._freeze = true;
try {
await promise;
} finally {
this._freeze = false;
this._rebuildLayout(this.layoutSpec.peek());
}
}
// Removes a view section from the current view. Should only be called if there is
// more than one viewsection in the view.
private _removeViewSection(viewSectionRowId: number) {
this.gristDoc.docData.sendAction(['RemoveViewSection', viewSectionRowId]).catch(reportError);
}
private _buildLeafContent(sectionRowId: number) {
// Creating normal section dom
const vs: ViewSectionRec = this.docModel.viewSections.getRowModel(sectionRowId);
return dom('div.view_leaf.viewsection_content.flexvbox.flexauto',
testId(`viewlayout-section-${sectionRowId}`),
this.gristDoc.app.addNewUIClass(),
dom.cls('active_section', vs.hasFocus),
dom.maybe((use) => use(vs.viewInstance) !== null, () => dom('div.viewsection_title.flexhbox',
dom('span.viewsection_drag_indicator.glyphicon.glyphicon-option-vertical',
this.gristDoc.app.addNewUIClass(),
// Makes element grabbable only if grist is not readonly.
dom.cls('layout_grabbable', (use) => !use(this.gristDoc.isReadonlyKo))),
dom('div.flexitem.flexhbox',
dom('span.viewsection_titletext', editableLabel(
fromKo(vs.titleDef),
(val) => vs.titleDef.saveOnly(val),
testId('viewsection-title'),
)),
),
dom.maybe<BaseView|null>(vs.viewInstance, (viewInstance: BaseView) => viewInstance.buildTitleControls()),
dom('span.viewsection_buttons',
viewSectionMenu(this.docModel, vs, this.viewModel, this.gristDoc.isReadonly, this.gristDoc.app.useNewUI)
)
)),
dom.maybe<BaseView|null>(vs.viewInstance, (viewInstance) =>
dom('div.view_data_pane_container.flexvbox',
dom.maybe(viewInstance.disableEditing, () =>
dom('div.disable_viewpane.flexvbox', 'No data')
),
dom.maybe(viewInstance.isTruncated, () =>
dom('div.viewsection_truncated', 'Not all data is shown')
),
dom.cls((use) => 'viewsection_type_' + use(vs.parentKey)),
viewInstance.viewPane
)
),
dom.on('mousedown', () => { this.viewModel.activeSectionId(sectionRowId); }),
);
}
/**
* If there is no layout saved, we can create a default layout just from the list of fields for
* this view section. By default we just arrange them into a list of rows, two fields per row.
*/
private _updateLayoutSpecWithSections(spec: object) {
// We use tmpLayout as a way to manipulate the layout before we get a final spec from it.
const tmpLayout = Layout.create(spec, (leafId: number) => dom('div'), true);
const specFieldIds = tmpLayout.getAllLeafIds();
const viewSectionIds = this.viewModel.viewSections().all().map(function(f) { return f.getRowId(); });
function addToSpec(leafId: number) {
const newBox = tmpLayout.buildLayoutBox({ leaf: leafId });
const rows = tmpLayout.rootBox().childBoxes.peek();
const lastRow = rows[rows.length - 1];
if (rows.length >= 1 && lastRow.isLeaf()) {
// Add a new child to the last row.
lastRow.addChild(newBox, true);
} else {
// Add a new row.
tmpLayout.rootBox().addChild(newBox, true);
}
return newBox;
}
// For any stale fields (no longer among viewFields), remove them from tmpLayout.
_.difference(specFieldIds, viewSectionIds).forEach(function(leafId) {
tmpLayout.getLeafBox(leafId).dispose();
});
// For all fields that should be in the spec but aren't, add them to tmpLayout. We maintain a
// two-column layout, so add a new row, or a second box to the last row if it's a leaf.
_.difference(viewSectionIds, specFieldIds).forEach(function(leafId) {
// Only add the builder box if it hasn`t already been created
addToSpec(leafId);
});
spec = tmpLayout.getLayoutSpec();
tmpLayout.dispose();
return spec;
}
private _rebuildLayout(layoutSpec: object) {
this._layout.buildLayout(layoutSpec, true);
this._onResize();
this._sectionIds = this._layout.getAllLeafIds();
}
// Resizes the scrolly windows of all viewSection classes with a 'scrolly' property.
private _onResize() {
this.viewModel.viewSections().all().forEach(vs => {
const inst = vs.viewInstance.peek();
if (inst) {
inst.onResize();
}
});
}
// Select another section in cyclic ordering of sections. Order is counter-clockwise if given a
// positive `delta`, clockwise otherwise.
private _otherSection(delta: number) {
const sectionId = this.viewModel.activeSectionId.peek();
const currentIndex = this._sectionIds.indexOf(sectionId);
const index = mod(currentIndex + delta, this._sectionIds.length);
// update the active section id
this.viewModel.activeSectionId(this._sectionIds[index]);
}
private _maybeFocusInSection() {
// If the focused element is inside a view section, make that section active.
const layoutBox = this._layout.getContainingBox(document.activeElement);
if (layoutBox && layoutBox.leafId) {
this.gristDoc.viewModel.activeSectionId(layoutBox.leafId.peek());
}
}
}