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// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use size 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 m from 'mithril';
import {BigintMath} from '../base/bigint_math';
import {Span, tpTimeToString} from '../common/time';
import {
TPTime,
TPTimeSpan,
} from '../common/time';
import {
BACKGROUND_COLOR,
FOREGROUND_COLOR,
TRACK_SHELL_WIDTH,
} from './css_constants';
import {globals} from './globals';
import {
getMaxMajorTicks,
TickGenerator,
TickType,
timeScaleForVisibleWindow,
} from './gridline_helper';
import {Panel, PanelSize} from './panel';
export interface BBox {
x: number;
y: number;
width: number;
height: number;
}
// Draws a vertical line with two horizontal tails at the left and right and
// a label in the middle. It looks a bit like a stretched H:
// |--- Label ---|
// The |target| bounding box determines where to draw the H.
// The |bounds| bounding box gives the visible region, this is used to adjust
// the positioning of the label to ensure it is on screen.
function drawHBar(
ctx: CanvasRenderingContext2D, target: BBox, bounds: BBox, label: string) {
ctx.fillStyle = FOREGROUND_COLOR;
const xLeft = Math.floor(target.x);
const xRight = Math.floor(target.x + target.width);
const yMid = Math.floor(target.height / 2 + target.y);
const xWidth = xRight - xLeft;
// Don't draw in the track shell.
ctx.beginPath();
ctx.rect(bounds.x, bounds.y, bounds.width, bounds.height);
ctx.clip();
// Draw horizontal bar of the H.
ctx.fillRect(xLeft, yMid, xWidth, 1);
// Draw left vertical bar of the H.
ctx.fillRect(xLeft, target.y, 1, target.height);
// Draw right vertical bar of the H.
ctx.fillRect(xRight, target.y, 1, target.height);
const labelWidth = ctx.measureText(label).width;
// Find a good position for the label:
// By default put the label in the middle of the H:
let labelXLeft = Math.floor(xWidth / 2 - labelWidth / 2 + xLeft);
if (labelWidth > target.width || labelXLeft < bounds.x ||
(labelXLeft + labelWidth) > (bounds.x + bounds.width)) {
// It won't fit in the middle or would be at least partly out of bounds
// so put it either to the left or right:
if (xRight > bounds.x + bounds.width) {
// If the H extends off the right side of the screen the label
// goes on the left of the H.
labelXLeft = xLeft - labelWidth - 3;
} else {
// Otherwise the label goes on the right of the H.
labelXLeft = xRight + 3;
}
}
ctx.fillStyle = BACKGROUND_COLOR;
ctx.fillRect(labelXLeft - 1, 0, labelWidth + 1, target.height);
ctx.textBaseline = 'middle';
ctx.fillStyle = FOREGROUND_COLOR;
ctx.font = '10px Roboto Condensed';
ctx.fillText(label, labelXLeft, yMid);
}
function drawIBar(
ctx: CanvasRenderingContext2D, xPos: number, bounds: BBox, label: string) {
if (xPos < bounds.x) return;
ctx.fillStyle = FOREGROUND_COLOR;
ctx.fillRect(xPos, 0, 1, bounds.width);
const yMid = Math.floor(bounds.height / 2 + bounds.y);
const labelWidth = ctx.measureText(label).width;
const padding = 3;
let xPosLabel;
if (xPos + padding + labelWidth > bounds.width) {
xPosLabel = xPos - padding;
ctx.textAlign = 'right';
} else {
xPosLabel = xPos + padding;
ctx.textAlign = 'left';
}
ctx.fillStyle = BACKGROUND_COLOR;
ctx.fillRect(xPosLabel - 1, 0, labelWidth + 2, bounds.height);
ctx.textBaseline = 'middle';
ctx.fillStyle = FOREGROUND_COLOR;
ctx.font = '10px Roboto Condensed';
ctx.fillText(label, xPosLabel, yMid);
}
export class TimeSelectionPanel extends Panel {
view() {
return m('.time-selection-panel');
}
renderCanvas(ctx: CanvasRenderingContext2D, size: PanelSize) {
ctx.fillStyle = '#999';
ctx.fillRect(TRACK_SHELL_WIDTH - 2, 0, 2, size.height);
ctx.save();
ctx.beginPath();
ctx.rect(TRACK_SHELL_WIDTH, 0, size.width - TRACK_SHELL_WIDTH, size.height);
ctx.clip();
const span = globals.frontendLocalState.visibleWindow.timestampSpan;
if (size.width > TRACK_SHELL_WIDTH && span.duration > 0n) {
const maxMajorTicks = getMaxMajorTicks(size.width - TRACK_SHELL_WIDTH);
const map = timeScaleForVisibleWindow(TRACK_SHELL_WIDTH, size.width);
for (const {type, time} of new TickGenerator(
span, maxMajorTicks, globals.state.traceTime.start)) {
const px = Math.floor(map.tpTimeToPx(time));
if (type === TickType.MAJOR) {
ctx.fillRect(px, 0, 1, size.height);
}
}
}
const localArea = globals.frontendLocalState.selectedArea;
const selection = globals.state.currentSelection;
if (localArea !== undefined) {
const start = BigintMath.min(localArea.start, localArea.end);
const end = BigintMath.max(localArea.start, localArea.end);
this.renderSpan(ctx, size, new TPTimeSpan(start, end));
} else if (selection !== null && selection.kind === 'AREA') {
const selectedArea = globals.state.areas[selection.areaId];
const start = BigintMath.min(selectedArea.start, selectedArea.end);
const end = BigintMath.max(selectedArea.start, selectedArea.end);
this.renderSpan(ctx, size, new TPTimeSpan(start, end));
}
if (globals.state.hoverCursorTimestamp !== -1n) {
this.renderHover(ctx, size, globals.state.hoverCursorTimestamp);
}
for (const note of Object.values(globals.state.notes)) {
const noteIsSelected = selection !== null && selection.kind === 'AREA' &&
selection.noteId === note.id;
if (note.noteType === 'AREA' && !noteIsSelected) {
const selectedArea = globals.state.areas[note.areaId];
this.renderSpan(
ctx, size, new TPTimeSpan(selectedArea.start, selectedArea.end));
}
}
ctx.restore();
}
renderHover(ctx: CanvasRenderingContext2D, size: PanelSize, ts: TPTime) {
const {visibleTimeScale} = globals.frontendLocalState;
const xPos =
TRACK_SHELL_WIDTH + Math.floor(visibleTimeScale.tpTimeToPx(ts));
const offsetTime = tpTimeToString(ts - globals.state.traceTime.start);
const timeFromStart = tpTimeToString(ts);
const label = `${offsetTime} (${timeFromStart})`;
drawIBar(ctx, xPos, this.bounds(size), label);
}
renderSpan(
ctx: CanvasRenderingContext2D, size: PanelSize, span: Span<TPTime>) {
const {visibleTimeScale} = globals.frontendLocalState;
const xLeft = visibleTimeScale.tpTimeToPx(span.start);
const xRight = visibleTimeScale.tpTimeToPx(span.end);
const label = tpTimeToString(span.duration);
drawHBar(
ctx,
{
x: TRACK_SHELL_WIDTH + xLeft,
y: 0,
width: xRight - xLeft,
height: size.height,
},
this.bounds(size),
label);
}
private bounds(size: PanelSize): BBox {
return {
x: TRACK_SHELL_WIDTH,
y: 0,
width: size.width - TRACK_SHELL_WIDTH,
height: size.height,
};
}
}
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