content/browser/renderer_host/overscroll_configuration.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/public/browser/overscroll_configuration.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace {
  10
  11 float g_horiz_threshold_complete = 0.25f;
  12 float g_vert_threshold_complete = 0.20f;
  13
  14 float g_min_threshold_start = 30.f;
  15
  16 float g_horiz_resist_after = 30.f;
  17 float g_vert_resist_after = 30.f;
  18
  19 }
  20
  21 namespace content {
  22
  23 void SetOverscrollConfig(OverscrollConfig config, float value) {
  24   switch (config) {
  25     case OVERSCROLL_CONFIG_HORIZ_THRESHOLD_COMPLETE:
  26       g_horiz_threshold_complete = value;
  27       break;
  28
  29     case OVERSCROLL_CONFIG_VERT_THRESHOLD_COMPLETE:
  30       g_vert_threshold_complete = value;
  31       break;
  32
  33     case OVERSCROLL_CONFIG_MIN_THRESHOLD_START:
  34       g_min_threshold_start = value;
  35       break;
  36
  37     case OVERSCROLL_CONFIG_HORIZ_RESIST_AFTER:
  38       g_horiz_resist_after = value;
  39       break;
  40
  41     case OVERSCROLL_CONFIG_VERT_RESIST_AFTER:
  42       g_vert_resist_after = value;
  43       break;
  44
  45     case OVERSCROLL_CONFIG_NONE:
  46     case OVERSCROLL_CONFIG_COUNT:
  47       NOTREACHED();
  48   }
  49 }
  50
  51 float GetOverscrollConfig(OverscrollConfig config) {
  52   switch (config) {
  53     case OVERSCROLL_CONFIG_HORIZ_THRESHOLD_COMPLETE:
  54       return g_horiz_threshold_complete;
  55
  56     case OVERSCROLL_CONFIG_VERT_THRESHOLD_COMPLETE:
  57       return g_vert_threshold_complete;
  58
  59     case OVERSCROLL_CONFIG_MIN_THRESHOLD_START:
  60       return g_min_threshold_start;
  61
  62     case OVERSCROLL_CONFIG_HORIZ_RESIST_AFTER:
  63       return g_horiz_resist_after;
  64
  65     case OVERSCROLL_CONFIG_VERT_RESIST_AFTER:
  66       return g_vert_resist_after;
  67
  68     case OVERSCROLL_CONFIG_NONE:
  69     case OVERSCROLL_CONFIG_COUNT:
  70       NOTREACHED();
  71   }
  72
  73   return -1.f;
  74 }
  75
  76 }  // namespace content