ui/src/components/widgets/charts/flamegraph_chart.scss

// Copyright (C) 2026 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-flamechart {
  position: relative;
  width: 100%;
  // Guard against sub-pixel rounding pushing the rightmost segment past the
  // chart box. Tooltips are portaled, so they're unaffected.
  overflow: hidden;
}

.pf-flamechart-segment {
  position: absolute;
  display: flex;
  align-items: center;
  box-sizing: border-box;
  min-width: 1px;
  border-radius: 4px;
  overflow: hidden;
  // Hairline gap between adjacent segments without eating into the colour.
  box-shadow: inset -1px 0 0 rgb(255 255 255 / 25%);
  transition: filter 0.12s ease;

  &:hover {
    filter: brightness(1.08);
  }
}

.pf-flamechart-segment__label {
  display: flex;
  align-items: baseline;
  gap: 6px;
  min-width: 0;
  padding: 0 8px;
  width: 100%;
  white-space: nowrap;
  overflow: hidden;
  pointer-events: none;
}

.pf-flamechart-segment__name {
  flex-shrink: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: var(--pf-font-size-xs, 11px);
  font-weight: 600;
  text-shadow: 0 0 2px rgb(0 0 0 / 25%);
}

.pf-flamechart-segment__value {
  flex-shrink: 0;
  font-size: var(--pf-font-size-xs, 11px);
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 2px rgb(0 0 0 / 25%);
  opacity: 0.85;
}

.pf-flamechart-tooltip {
  &__name {
    font-weight: 600;
    font-size: var(--pf-font-size-s, 12px);
    color: var(--pf-color-text, rgb(0 0 0 / 85%));
  }

  &__value {
    margin-top: 2px;
    font-size: var(--pf-font-size-xs, 11px);
    font-variant-numeric: tabular-nums;
    color: var(--pf-color-text-muted, rgb(0 0 0 / 60%));
  }

  &__desc {
    margin-top: 6px;
    max-width: 280px;
    white-space: normal;
    font-size: var(--pf-font-size-xs, 11px);
    line-height: 1.4;
    color: var(--pf-color-text-muted, rgb(0 0 0 / 60%));
  }
}

// Note: __desc is available for custom tooltip content via the segment's
// tooltip prop; the default tooltip only uses __name and __value.