ui/src/widgets/flamegraph.scss

// Copyright (C) 2023 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.

.pf-flamegraph {
  height: 100%;
  overflow-y: hidden;

  .loading-container {
    font-size: larger;
    display: flex;
    align-items: baseline;
    justify-content: center;
    height: 100%;
  }

  .popup-anchor {
    width: 0px;
    height: 0px;
    position: absolute;
  }

  canvas {
    user-select: none;
  }

  .canvas-container {
    height: 100%;
    position: relative;
    overflow-y: auto;
  }

  .pf-virtual-canvas {
    height: 100%;
  }
}

.pf-flamegraph-tooltip-popup {
  width: max-content;
  font-size: 15px;
  display: flex;
  flex-direction: column;
  padding: 4px;

  .tooltip-text-line {
    display: flex;
    cursor: text;
    padding-top: 4px;
    gap: 4px;
  }

  .tooltip-text {
    cursor: text;
  }

  .tooltip-bold-text {
    font-weight: 600;
    cursor: text;
  }

  .pf-button-bar {
    padding-top: 16px;
  }

  .tooltip-marker-text {
    font-size: var(--pf-font-size-s);
    font-style: italic;
    color: var(--pf-color-text-muted);
    padding-bottom: 4px; // Extra gap between marker and function name
  }
}

// All category buttons share the width of the widest one: equal 1fr columns in
// a grid sized to its content (width: max-content), so the bar shrink-wraps
// instead of stretching the buttons to fill a wider tooltip.
.pf-button-bar.pf-flamegraph-action-bar {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  width: max-content;
  gap: 8px;
  margin-top: 6px;

  > .pf-button {
    justify-content: center;
  }
}

// Compound selector overrides .pf-popup's own max-width.
.pf-flamegraph-action-menu.pf-popup {
  max-width: 460px;
}

.pf-flamegraph-action-menu {
  .pf-menu {
    // Drop the default vertical margin so item hover reaches the popup edges.
    margin: 0;
    max-height: min(60vh, 480px);
    overflow-y: auto;
    // overflow-y:auto also implies overflow-x:auto; pin it off to avoid a
    // spurious horizontal scrollbar.
    overflow-x: hidden;
  }

  // Let items shrink so descriptions wrap instead of widening the popup.
  .pf-menu-item {
    min-width: 0;
  }
}

// Rendered in a popup portal outside .pf-flamegraph, hence a top-level selector.
.pf-flamegraph-action {
  display: flex;
  flex-direction: column;
  min-width: 0;

  &__title {
    white-space: normal;
    overflow-wrap: anywhere;
    line-height: 1.3;
  }

  &__desc {
    font-size: smaller;
    color: var(--pf-color-text-muted);
    white-space: normal;
    overflow-wrap: anywhere;
    line-height: 1.25;
  }

  &__aka {
    font-style: italic;
  }
}