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// Copyright (C) 2020 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import * as m from 'mithril';
import {Actions} from '../common/actions';
import {globals} from './globals';
import {createPage} from './pages';
import {QueryTable} from './query_table';
const INPUT_PLACEHOLDER = 'Enter query and press Cmd/Ctrl + Enter';
const INPUT_MIN_LINES = 2;
const INPUT_MAX_LINES = 10;
const INPUT_LINE_HEIGHT_EM = 1.2;
const TAB_SPACES = 2;
const QUERY_ID = 'analyze-page-query';
class QueryInput implements m.ClassComponent {
// How many lines to display if the user hasn't resized the input box.
displayLines = INPUT_MIN_LINES;
static onKeyDown(e: Event) {
const event = e as KeyboardEvent;
const target = e.target as HTMLTextAreaElement;
if (event.code === 'Enter' && (event.metaKey || event.ctrlKey)) {
event.preventDefault();
const query = target.value;
if (!query) return;
globals.dispatch(
Actions.executeQuery({engineId: '0', queryId: QUERY_ID, query}));
}
if (event.code === 'Tab') {
// Handle tabs to insert spaces.
event.preventDefault();
const whitespace = ' '.repeat(TAB_SPACES);
const {selectionStart, selectionEnd} = target;
target.value = target.value.substring(0, selectionStart) + whitespace +
target.value.substring(selectionEnd);
target.selectionEnd = selectionStart + TAB_SPACES;
}
}
onInput(textareaValue: string) {
const textareaLines = textareaValue.split('\n').length;
const clampedNumLines =
Math.min(Math.max(textareaLines, INPUT_MIN_LINES), INPUT_MAX_LINES);
this.displayLines = clampedNumLines;
globals.dispatch(Actions.setAnalyzePageQuery({query: textareaValue}));
globals.rafScheduler.scheduleFullRedraw();
}
// This method exists because unfortunatley setting custom properties on an
// element's inline style attribue doesn't seem to work in mithril, even
// though the docs claim so.
setHeightBeforeResize(node: HTMLElement) {
// +2em for some extra breathing space to account for padding.
const heightEm = this.displayLines * INPUT_LINE_HEIGHT_EM + 2;
// We set a height based on the number of lines that we want to display by
// default. If the user resizes the textbox using the resize handle in the
// bottom-right corner, this height is overridden.
node.style.setProperty('--height-before-resize', `${heightEm}em`);
// TODO(dproy): The resized height is lost if user navigates away from the
// page and comes back.
}
oncreate(vnode: m.VnodeDOM) {
// This makes sure query persists if user navigates to other pages and comes
// back to analyze page.
const existingQuery = globals.state.analyzePageQuery;
const textarea = vnode.dom as HTMLTextAreaElement;
if (existingQuery) {
textarea.value = existingQuery;
this.onInput(existingQuery);
}
this.setHeightBeforeResize(textarea);
}
onupdate(vnode: m.VnodeDOM) {
this.setHeightBeforeResize(vnode.dom as HTMLElement);
}
view() {
return m('textarea.query-input', {
placeholder: INPUT_PLACEHOLDER,
onkeydown: (e: Event) => QueryInput.onKeyDown(e),
oninput: (e: Event) =>
this.onInput((e.target as HTMLTextAreaElement).value),
});
}
}
export const AnalyzePage = createPage({
view() {
return m(
'.analyze-page',
m(QueryInput),
m(QueryTable, {queryId: QUERY_ID}),
);
}
});
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