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/*
Copyright 2013 bigbiff/Dees_Troy TeamWin
This file is part of TWRP/TeamWin Recovery Project.
TWRP is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TWRP is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
extern "C" {
#include "../twcommon.h"
#include "../minuitwrp/minui.h"
}
#include "rapidxml.hpp"
#include "objects.hpp"
#include "../data.hpp"
const int SCROLLING_SPEED_DECREMENT = 6; // friction
const int SCROLLING_FLOOR = 10; // minimum pixels for scrolling to start or stop
const int SCROLLING_MULTIPLIER = 1; // initial speed of kinetic scrolling
const float SCROLLING_SPEED_LIMIT = 2.5; // maximum number of items to scroll per update
GUIScrollList::GUIScrollList(xml_node<>* node) : GUIObject(node)
{
xml_attribute<>* attr;
xml_node<>* child;
int header_separator_color_specified = 0, header_separator_height_specified = 0, header_text_color_specified = 0, header_background_color_specified = 0;
firstDisplayedItem = mItemSpacing = mFontHeight = mSeparatorH = y_offset = scrollingSpeed = 0;
maxIconWidth = maxIconHeight = mHeaderIconHeight = mHeaderIconWidth = 0;
mHeaderSeparatorH = mHeaderIsStatic = mHeaderH = actualItemHeight = 0;
mBackground = mFont = mHeaderIcon = NULL;
mBackgroundW = mBackgroundH = 0;
mFastScrollW = mFastScrollLineW = mFastScrollRectW = mFastScrollRectH = 0;
lastY = last2Y = fastScroll = 0;
mUpdate = 0;
touchDebounce = 6;
ConvertStrToColor("black", &mBackgroundColor);
ConvertStrToColor("black", &mHeaderBackgroundColor);
ConvertStrToColor("black", &mSeparatorColor);
ConvertStrToColor("black", &mHeaderSeparatorColor);
ConvertStrToColor("white", &mFontColor);
ConvertStrToColor("white", &mHeaderFontColor);
ConvertStrToColor("white", &mFastScrollLineColor);
ConvertStrToColor("white", &mFastScrollRectColor);
hasHighlightColor = false;
hasFontHighlightColor = false;
selectedItem = NO_ITEM;
// Load header text
child = node->first_node("header");
if (child)
{
attr = child->first_attribute("icon");
if (attr)
mHeaderIcon = PageManager::FindResource(attr->value());
attr = child->first_attribute("background");
if (attr)
{
std::string color = attr->value();
ConvertStrToColor(color, &mHeaderBackgroundColor);
header_background_color_specified = -1;
}
attr = child->first_attribute("textcolor");
if (attr)
{
std::string color = attr->value();
ConvertStrToColor(color, &mHeaderFontColor);
header_text_color_specified = -1;
}
attr = child->first_attribute("separatorcolor");
if (attr)
{
std::string color = attr->value();
ConvertStrToColor(color, &mHeaderSeparatorColor);
header_separator_color_specified = -1;
}
attr = child->first_attribute("separatorheight");
if (attr) {
string parsevalue = gui_parse_text(attr->value());
mHeaderSeparatorH = atoi(parsevalue.c_str());
header_separator_height_specified = -1;
}
}
child = node->first_node("text");
if (child) mHeaderText = child->value();
memset(&mHighlightColor, 0, sizeof(COLOR));
child = node->first_node("highlight");
if (child) {
attr = child->first_attribute("color");
if (attr) {
hasHighlightColor = true;
std::string color = attr->value();
ConvertStrToColor(color, &mHighlightColor);
}
}
// Simple way to check for static state
mLastHeaderValue = gui_parse_text(mHeaderText);
if (mLastHeaderValue != mHeaderText)
mHeaderIsStatic = 0;
else
mHeaderIsStatic = -1;
child = node->first_node("background");
if (child)
{
attr = child->first_attribute("resource");
if (attr)
mBackground = PageManager::FindResource(attr->value());
attr = child->first_attribute("color");
if (attr)
{
std::string color = attr->value();
ConvertStrToColor(color, &mBackgroundColor);
if (!header_background_color_specified)
ConvertStrToColor(color, &mHeaderBackgroundColor);
}
}
// Load the placement
LoadPlacement(node->first_node("placement"), &mRenderX, &mRenderY, &mRenderW, &mRenderH);
SetActionPos(mRenderX, mRenderY, mRenderW, mRenderH);
// Load the font, and possibly override the color
child = node->first_node("font");
if (child)
{
attr = child->first_attribute("resource");
if (attr)
mFont = PageManager::FindResource(attr->value());
attr = child->first_attribute("color");
if (attr)
{
std::string color = attr->value();
ConvertStrToColor(color, &mFontColor);
if (!header_text_color_specified)
ConvertStrToColor(color, &mHeaderFontColor);
}
attr = child->first_attribute("spacing");
if (attr) {
string parsevalue = gui_parse_text(attr->value());
mItemSpacing = atoi(parsevalue.c_str());
}
attr = child->first_attribute("highlightcolor");
memset(&mFontHighlightColor, 0, sizeof(COLOR));
if (attr)
{
std::string color = attr->value();
ConvertStrToColor(color, &mFontHighlightColor);
hasFontHighlightColor = true;
}
}
// Load the separator if it exists
child = node->first_node("separator");
if (child)
{
attr = child->first_attribute("color");
if (attr)
{
std::string color = attr->value();
ConvertStrToColor(color, &mSeparatorColor);
if (!header_separator_color_specified)
ConvertStrToColor(color, &mHeaderSeparatorColor);
}
attr = child->first_attribute("height");
if (attr) {
string parsevalue = gui_parse_text(attr->value());
mSeparatorH = atoi(parsevalue.c_str());
if (!header_separator_height_specified)
mHeaderSeparatorH = mSeparatorH;
}
}
// Fast scroll colors
child = node->first_node("fastscroll");
if (child)
{
attr = child->first_attribute("linecolor");
if(attr)
ConvertStrToColor(attr->value(), &mFastScrollLineColor);
attr = child->first_attribute("rectcolor");
if(attr)
ConvertStrToColor(attr->value(), &mFastScrollRectColor);
attr = child->first_attribute("w");
if (attr) {
string parsevalue = gui_parse_text(attr->value());
mFastScrollW = atoi(parsevalue.c_str());
}
attr = child->first_attribute("linew");
if (attr) {
string parsevalue = gui_parse_text(attr->value());
mFastScrollLineW = atoi(parsevalue.c_str());
}
attr = child->first_attribute("rectw");
if (attr) {
string parsevalue = gui_parse_text(attr->value());
mFastScrollRectW = atoi(parsevalue.c_str());
}
attr = child->first_attribute("recth");
if (attr) {
string parsevalue = gui_parse_text(attr->value());
mFastScrollRectH = atoi(parsevalue.c_str());
}
}
// Retrieve the line height
mFontHeight = gr_getMaxFontHeight(mFont ? mFont->GetResource() : NULL);
mHeaderH = mFontHeight;
if (mHeaderIcon && mHeaderIcon->GetResource())
{
mHeaderIconWidth = gr_get_width(mHeaderIcon->GetResource());
mHeaderIconHeight = gr_get_height(mHeaderIcon->GetResource());
if (mHeaderIconHeight > mHeaderH)
mHeaderH = mHeaderIconHeight;
if (mHeaderIconWidth > maxIconWidth)
maxIconWidth = mHeaderIconWidth;
}
mHeaderH += mItemSpacing + mHeaderSeparatorH;
actualItemHeight = mFontHeight + mItemSpacing + mSeparatorH;
if (mHeaderH < actualItemHeight)
mHeaderH = actualItemHeight;
if (actualItemHeight / 3 > 6)
touchDebounce = actualItemHeight / 3;
if (mBackground && mBackground->GetResource())
{
mBackgroundW = gr_get_width(mBackground->GetResource());
mBackgroundH = gr_get_height(mBackground->GetResource());
}
}
GUIScrollList::~GUIScrollList()
{
delete mHeaderIcon;
delete mBackground;
delete mFont;
}
void GUIScrollList::SetMaxIconSize(int w, int h)
{
if (w > maxIconWidth)
maxIconWidth = w;
if (h > maxIconHeight)
maxIconHeight = h;
if (maxIconHeight > mFontHeight) {
actualItemHeight = maxIconHeight + mItemSpacing + mSeparatorH;
if (actualItemHeight > mHeaderH)
mHeaderH = actualItemHeight;
}
}
void GUIScrollList::SetVisibleListLocation(size_t list_index)
{
// This will make sure that the item indicated by list_index is visible on the screen
size_t lines = GetDisplayItemCount(), listSize = GetItemCount();
if (list_index <= (unsigned)firstDisplayedItem) {
// list_index is above the currently displayed items, put the selected item at the very top
firstDisplayedItem = list_index;
y_offset = 0;
} else if (list_index >= firstDisplayedItem + lines) {
// list_index is below the currently displayed items, put the selected item at the very bottom
firstDisplayedItem = list_index - lines + 1;
if (GetDisplayRemainder() != 0) {
// There's a partial row displayed, set the scrolling offset so that the selected item really is at the very bottom
firstDisplayedItem--;
y_offset = GetDisplayRemainder() - actualItemHeight;
} else {
// There's no partial row so zero out the offset
y_offset = 0;
}
}
scrollingSpeed = 0; // stop kinetic scrolling on setting visible location
mUpdate = 1;
}
int GUIScrollList::Render(void)
{
if(!isConditionTrue())
return 0;
// First step, fill background
gr_color(mBackgroundColor.red, mBackgroundColor.green, mBackgroundColor.blue, 255);
gr_fill(mRenderX, mRenderY + mHeaderH, mRenderW, mRenderH - mHeaderH);
// Next, render the background resource (if it exists)
if (mBackground && mBackground->GetResource())
{
int mBackgroundX = mRenderX + ((mRenderW - mBackgroundW) / 2);
int mBackgroundY = mRenderY + ((mRenderH - mBackgroundH) / 2);
gr_blit(mBackground->GetResource(), 0, 0, mBackgroundW, mBackgroundH, mBackgroundX, mBackgroundY);
}
// This tells us how many lines we can actually render
size_t lines = GetDisplayItemCount();
size_t listSize = GetItemCount();
int listW = mRenderW;
if (listSize <= lines) {
hasScroll = false;
scrollingSpeed = 0;
lines = listSize;
y_offset = 0;
} else {
hasScroll = true;
listW -= mFastScrollW; // space for fast scroll
lines++;
if (lines < listSize)
lines++;
}
void* fontResource = NULL;
if (mFont) fontResource = mFont->GetResource();
int yPos = mRenderY + mHeaderH + y_offset;
int fontOffsetY = (int)((actualItemHeight - mFontHeight) / 2);
// render all visible items
for (size_t line = 0; line < lines; line++)
{
size_t itemindex = line + firstDisplayedItem;
if (itemindex >= listSize)
break;
// get item data
Resource* icon;
std::string label;
if (GetListItem(itemindex, icon, label))
break;
if (hasHighlightColor && itemindex == selectedItem) {
// Highlight the item background of the selected item
gr_color(mHighlightColor.red, mHighlightColor.green, mHighlightColor.blue, 255);
int HighlightHeight = actualItemHeight;
if (yPos + HighlightHeight > mRenderY + mRenderH) {
HighlightHeight = mRenderY + mRenderH - yPos;
}
gr_fill(mRenderX, yPos, mRenderW, HighlightHeight);
}
if (hasFontHighlightColor && itemindex == selectedItem) {
// Use the highlight color for the font
gr_color(mFontHighlightColor.red, mFontHighlightColor.green, mFontHighlightColor.blue, 255);
} else {
// Set the color for the font
gr_color(mFontColor.red, mFontColor.green, mFontColor.blue, 255);
}
if (icon && icon->GetResource()) {
int currentIconHeight = gr_get_height(icon->GetResource());
int currentIconWidth = gr_get_width(icon->GetResource());
int currentIconOffsetY = (int)((actualItemHeight - currentIconHeight) / 2);
int currentIconOffsetX = (maxIconWidth - currentIconWidth) / 2;
int rect_y = 0, image_y = (yPos + currentIconOffsetY);
if (image_y + currentIconHeight > mRenderY + mRenderH)
rect_y = mRenderY + mRenderH - image_y;
else
rect_y = currentIconHeight;
gr_blit(icon->GetResource(), 0, 0, currentIconWidth, rect_y, mRenderX + currentIconOffsetX, image_y);
}
gr_textExWH(mRenderX + maxIconWidth + 5, yPos + fontOffsetY, label.c_str(), fontResource, mRenderX + listW, mRenderY + mRenderH);
// Add the separator
if (yPos + actualItemHeight < mRenderH + mRenderY) {
gr_color(mSeparatorColor.red, mSeparatorColor.green, mSeparatorColor.blue, 255);
gr_fill(mRenderX, yPos + actualItemHeight - mSeparatorH, listW, mSeparatorH);
}
// Move the yPos
yPos += actualItemHeight;
}
// Render the Header (last so that it overwrites the top most row for per pixel scrolling)
// First step, fill background
gr_color(mHeaderBackgroundColor.red, mHeaderBackgroundColor.green, mHeaderBackgroundColor.blue, 255);
gr_fill(mRenderX, mRenderY, mRenderW, mHeaderH);
// Now, we need the header (icon + text)
yPos = mRenderY;
{
Resource* headerIcon;
int mIconOffsetX = 0;
// render the icon if it exists
headerIcon = mHeaderIcon;
if (headerIcon && headerIcon->GetResource())
{
gr_blit(headerIcon->GetResource(), 0, 0, mHeaderIconWidth, mHeaderIconHeight, mRenderX + ((mHeaderIconWidth - maxIconWidth) / 2), (yPos + (int)((mHeaderH - mHeaderIconHeight) / 2)));
mIconOffsetX = maxIconWidth;
}
// render the text
gr_color(mHeaderFontColor.red, mHeaderFontColor.green, mHeaderFontColor.blue, 255);
gr_textExWH(mRenderX + mIconOffsetX + 5, yPos + (int)((mHeaderH - mFontHeight) / 2), mLastHeaderValue.c_str(), fontResource, mRenderX + mRenderW, mRenderY + mRenderH);
// Add the separator
gr_color(mHeaderSeparatorColor.red, mHeaderSeparatorColor.green, mHeaderSeparatorColor.blue, 255);
gr_fill(mRenderX, yPos + mHeaderH - mHeaderSeparatorH, mRenderW, mHeaderSeparatorH);
}
// render fast scroll
lines = GetDisplayItemCount();
if (hasScroll) {
int startX = listW + mRenderX;
int fWidth = mRenderW - listW;
int fHeight = mRenderH - mHeaderH;
// line
gr_color(mFastScrollLineColor.red, mFastScrollLineColor.green, mFastScrollLineColor.blue, 255);
gr_fill(startX + fWidth/2, mRenderY + mHeaderH, mFastScrollLineW, mRenderH - mHeaderH);
// rect
int pct = 0;
if (GetDisplayRemainder() != 0) {
// Properly handle the percentage if a partial line is present
int partial_line_size = actualItemHeight - GetDisplayRemainder();
pct = ((firstDisplayedItem*actualItemHeight - y_offset)*100)/(listSize*actualItemHeight-((lines + 1)*actualItemHeight) + partial_line_size);
} else {
pct = ((firstDisplayedItem*actualItemHeight - y_offset)*100)/(listSize*actualItemHeight-lines*actualItemHeight);
}
int mFastScrollRectX = startX + (fWidth - mFastScrollRectW)/2;
int mFastScrollRectY = mRenderY+mHeaderH + ((fHeight - mFastScrollRectH)*pct)/100;
gr_color(mFastScrollRectColor.red, mFastScrollRectColor.green, mFastScrollRectColor.blue, 255);
gr_fill(mFastScrollRectX, mFastScrollRectY, mFastScrollRectW, mFastScrollRectH);
}
mUpdate = 0;
return 0;
}
int GUIScrollList::Update(void)
{
if(!isConditionTrue())
return 0;
if (!mHeaderIsStatic) {
std::string newValue = gui_parse_text(mHeaderText);
if (mLastHeaderValue != newValue) {
mLastHeaderValue = newValue;
mUpdate = 1;
}
}
// Handle kinetic scrolling
int maxScrollDistance = actualItemHeight * SCROLLING_SPEED_LIMIT;
if (scrollingSpeed == 0) {
// Do nothing
return 0;
} else if (scrollingSpeed > 0) {
if (scrollingSpeed < maxScrollDistance)
y_offset += scrollingSpeed;
else
y_offset += maxScrollDistance;
scrollingSpeed -= SCROLLING_SPEED_DECREMENT;
} else if (scrollingSpeed < 0) {
if (abs(scrollingSpeed) < maxScrollDistance)
y_offset += scrollingSpeed;
else
y_offset -= maxScrollDistance;
scrollingSpeed += SCROLLING_SPEED_DECREMENT;
}
if (abs(scrollingSpeed) < SCROLLING_FLOOR)
scrollingSpeed = 0;
HandleScrolling();
mUpdate = 1;
return 0;
}
size_t GUIScrollList::HitTestItem(int x, int y)
{
// We only care about y position
if (y < mRenderY || y - mRenderY <= mHeaderH || y - mRenderY > mRenderH)
return NO_ITEM;
int startSelection = (y - mRenderY - mHeaderH);
// Locate the correct item
size_t actualSelection = firstDisplayedItem;
int selectY = y_offset;
while (selectY + actualItemHeight < startSelection) {
selectY += actualItemHeight;
actualSelection++;
}
if (actualSelection < GetItemCount())
return actualSelection;
return NO_ITEM;
}
int GUIScrollList::NotifyTouch(TOUCH_STATE state, int x, int y)
{
if(!isConditionTrue())
return -1;
switch (state)
{
case TOUCH_START:
if (hasScroll && x >= mRenderX + mRenderW - mFastScrollW)
fastScroll = 1; // Initial touch is in the fast scroll region
if (scrollingSpeed != 0) {
selectedItem = NO_ITEM; // this allows the user to tap the list to stop the scrolling without selecting the item they tap
scrollingSpeed = 0; // stop scrolling on a new touch
} else if (!fastScroll) {
// find out which item the user touched
selectedItem = HitTestItem(x, y);
}
if (selectedItem != NO_ITEM)
mUpdate = 1;
lastY = last2Y = y;
break;
case TOUCH_DRAG:
if (fastScroll)
{
int pct = ((y-mRenderY-mHeaderH)*100)/(mRenderH-mHeaderH);
int totalSize = GetItemCount();
int lines = GetDisplayItemCount();
float l = float((totalSize-lines)*pct)/100;
if(l + lines >= totalSize)
{
firstDisplayedItem = totalSize - lines;
if (GetDisplayRemainder() != 0) {
// There's a partial row displayed, set the scrolling offset so that the last item really is at the very bottom
firstDisplayedItem--;
y_offset = GetDisplayRemainder() - actualItemHeight;
} else {
// There's no partial row so zero out the offset
y_offset = 0;
}
}
else
{
if (l < 0)
l = 0;
firstDisplayedItem = l;
y_offset = -(l - int(l))*actualItemHeight;
if (GetDisplayRemainder() != 0) {
// There's a partial row displayed, make sure y_offset doesn't go past the max
if (firstDisplayedItem == totalSize - lines - 1 && y_offset < GetDisplayRemainder() - actualItemHeight)
y_offset = GetDisplayRemainder() - actualItemHeight;
} else if (firstDisplayedItem == totalSize - lines)
y_offset = 0;
}
selectedItem = NO_ITEM;
mUpdate = 1;
scrollingSpeed = 0; // prevent kinetic scrolling when using fast scroll
break;
}
// Provide some debounce on initial touches
if (selectedItem != NO_ITEM && abs(y - lastY) < touchDebounce) {
mUpdate = 1;
break;
}
selectedItem = NO_ITEM; // nothing is selected because we dragged too far
// Handle scrolling
if (hasScroll) {
y_offset += y - lastY; // adjust the scrolling offset based on the difference between the starting touch and the current touch
last2Y = lastY; // keep track of previous y locations so that we can tell how fast to scroll for kinetic scrolling
lastY = y; // update last touch to the current touch so we can tell how far and what direction we scroll for the next touch event
HandleScrolling();
} else
y_offset = 0;
mUpdate = 1;
break;
case TOUCH_RELEASE:
fastScroll = 0;
if (selectedItem != NO_ITEM) {
// We've selected an item!
NotifySelect(selectedItem);
mUpdate = 1;
DataManager::Vibrate("tw_button_vibrate");
selectedItem = NO_ITEM;
} else {
// Start kinetic scrolling
scrollingSpeed = lastY - last2Y;
if (abs(scrollingSpeed) > SCROLLING_FLOOR)
scrollingSpeed *= SCROLLING_MULTIPLIER;
else
scrollingSpeed = 0;
}
case TOUCH_REPEAT:
case TOUCH_HOLD:
break;
}
return 0;
}
void GUIScrollList::HandleScrolling()
{
// handle dragging downward, scrolling upward
// the offset should always be <= 0 and > -actualItemHeight, adjust the first display row and offset as needed
while(firstDisplayedItem && y_offset > 0) {
firstDisplayedItem--;
y_offset -= actualItemHeight;
}
if (firstDisplayedItem == 0 && y_offset > 0)
y_offset = 0; // user kept dragging downward past the top of the list, so always reset the offset to 0 since we can't scroll any further in this direction
// handle dragging upward, scrolling downward
int totalSize = GetItemCount();
int lines = GetDisplayItemCount(); // number of full lines our list can display at once
int bottom_offset = GetDisplayRemainder() - actualItemHeight; // extra display area that can display a partial line for per pixel scrolling
// the offset should always be <= 0 and > -actualItemHeight, adjust the first display row and offset as needed
while (firstDisplayedItem + lines + (bottom_offset ? 1 : 0) < totalSize && abs(y_offset) > actualItemHeight) {
firstDisplayedItem++;
y_offset += actualItemHeight;
}
// Check if we dragged too far, set the list at the bottom and adjust offset as needed
if (bottom_offset != 0 && firstDisplayedItem + lines + 1 >= totalSize && y_offset <= bottom_offset) {
firstDisplayedItem = totalSize - lines - 1;
y_offset = bottom_offset;
} else if (firstDisplayedItem + lines >= totalSize && y_offset < 0) {
firstDisplayedItem = totalSize - lines;
y_offset = 0;
}
}
int GUIScrollList::GetDisplayItemCount()
{
return (mRenderH - mHeaderH) / (actualItemHeight);
}
int GUIScrollList::GetDisplayRemainder()
{
return (mRenderH - mHeaderH) % actualItemHeight;
}
int GUIScrollList::NotifyVarChange(const std::string& varName, const std::string& value)
{
GUIObject::NotifyVarChange(varName, value);
if(!isConditionTrue())
return 0;
if (!mHeaderIsStatic) {
std::string newValue = gui_parse_text(mHeaderText);
if (mLastHeaderValue != newValue) {
mLastHeaderValue = newValue;
firstDisplayedItem = 0;
y_offset = 0;
scrollingSpeed = 0; // stop kinetic scrolling on variable changes
mUpdate = 1;
}
}
return 0;
}
int GUIScrollList::SetRenderPos(int x, int y, int w /* = 0 */, int h /* = 0 */)
{
mRenderX = x;
mRenderY = y;
if (w || h)
{
mRenderW = w;
mRenderH = h;
}
SetActionPos(mRenderX, mRenderY, mRenderW, mRenderH);
mUpdate = 1;
return 0;
}
void GUIScrollList::SetPageFocus(int inFocus)
{
if (inFocus) {
NotifyVarChange("", ""); // This forces a check for the header text
scrollingSpeed = 0; // stop kinetic scrolling on page changes
mUpdate = 1;
}
}