TableView.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for SDL3 and C.
 * Copyright (C) 2014 Jay Dolan <jay@jaydolan.com>
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#include <assert.h>
#include <string.h>
 
#include <Objectively/String.h>
 
#include "TableView.h"
 
#define _Class _TableView
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
  TableView *this = (TableView *) self;
 
  memset(&this->delegate, 0, sizeof(this->delegate));
 
  release(this->columns);
  release(this->contentView);
  release(this->headerView);
  release(this->rows);
  release(this->scrollView);
 
  super(Object, self, dealloc);
}
 
#pragma mark - View
 
static void awakeWithDictionary_columns(const Array *array, ident obj, ident data) {
 
  const String *identifier = $((Dictionary *) obj, objectForKeyPath, "identifier");
  assert(identifier);
 
  TableColumn *column = $(alloc(TableColumn), initWithIdentifier, identifier->chars);
  assert(column);
 
  $((TableView *) data, addColumn, column);
 
  release(column);
}
 
static void awakeWithDictionary(View *self, const Dictionary *dictionary) {
 
  super(View, self, awakeWithDictionary, dictionary);
 
  const Array *columns = $(dictionary, objectForKeyPath, "columns");
  if (columns) {
    $(columns, enumerate, awakeWithDictionary_columns, self);
  }
}
 
static View *init(View *self) {
  return (View *) $((TableView *) self, initWithFrame, NULL);
}
 
static void layoutSubviews(View *self) {
 
  super(View, self, layoutSubviews);
 
  TableView *this = (TableView *) self;
 
  View *scrollView = (View *) this->scrollView;
  View *headerView = (View *) this->headerView;
 
  SDL_Rect frame = $(self, bounds);
 
  if (headerView->visibility != ViewVisibilityHidden) {
 
    const SDL_Size size = $(headerView, sizeThatFits);
 
    frame.y += size.h;
    frame.h -= size.h;
  }
 
  scrollView->frame = frame;
  $(scrollView, setNeedsLayout);
 
  $(scrollView, layoutIfNeeded);
}
 
static SDL_Size sizeThatFits(const View *self) {
 
  if ($(self, isContainer) == false) {
    return $(self, size);
  }
 
  const TableView *this = (TableView *) self;
 
  return $(this, naturalSize);
}
 
#pragma mark - Control
 
 
static bool captureEvent(Control *self, const SDL_Event *event) {
 
  TableView *this = (TableView *) self;
 
  if (event->type == SDL_EVENT_MOUSE_BUTTON_UP) {
 
    if ($((View *) this->headerView, didReceiveEvent, event)) {
 
      const SDL_Point point = {
        .x = event->button.x,
        .y = event->button.y
      };
 
      TableColumn *column = $(this, columnAtPoint, &point);
      if (column) {
        $(this, setSortColumn, column);
      }
 
      return true;
    }
 
    if ($((Control *) this->scrollView, isHighlighted) == false) {
      if ($((View *) this->contentView, didReceiveEvent, event)) {
 
        const SDL_Point point = {
          .x = event->button.x,
          .y = event->button.y
        };
 
        const ssize_t index = $(this, rowAtPoint, &point);
 
        const Array *rows = (Array *) this->rows;
        if (index > -1 && index < (ssize_t) rows->count) {
 
          TableRowView *row = $(rows, objectAtIndex, index);
 
          switch (this->control.selection) {
            case ControlSelectionNone:
              break;
            case ControlSelectionSingle:
              if (row->isSelected == false) {
                $(this, deselectAll);
                $(this, selectRowAtIndex, index);
              }
              break;
            case ControlSelectionMultiple:
              if (SDL_GetModState() & (SDL_KMOD_CTRL | SDL_KMOD_GUI)) {
                if (row->isSelected) {
                  $(this, deselectRowAtIndex, index);
                } else {
                  $(this, selectRowAtIndex, index);
                }
              } else {
                $(this, deselectAll);
                $(this, selectRowAtIndex, index);
              }
              break;
          }
 
          if (this->delegate.didSelectRowsAtIndexes) {
            IndexSet *selectedRowIndexes = $(this, selectedRowIndexes);
 
            this->delegate.didSelectRowsAtIndexes(this, selectedRowIndexes);
 
            release(selectedRowIndexes);
          }
        }
 
        return true;
      }
    }
  }
 
  return super(Control, self, captureEvent, event);
}
 
 
#pragma mark - TableView
 
static void addColumn(TableView *self, TableColumn *column) {
 
  assert(column);
 
  $(self->columns, addObject, column);
 
  $((TableRowView *) self->headerView, addCell, (TableCellView *) column->headerCell);
}
 
static void addColumnWithIdentifier(TableView *self, const char *identifier) {
 
  TableColumn *column = $(alloc(TableColumn), initWithIdentifier, identifier);
  assert(column);
 
  $(self, addColumn, column);
 
  release(column);
}
 
static TableColumn *columnAtPoint(const TableView *self, const SDL_Point *point) {
 
  const SDL_Rect frame = $((View *) self, renderFrame);
  if (SDL_PointInRect(point, &frame)) {
 
    const Array *cells = (Array *) self->headerView->tableRowView.cells;
    const Array *columns = (Array *) self->columns;
 
    assert(cells->count == columns->count);
 
    for (size_t i = 0; i < cells->count; i++) {
 
      const View *cell = $(cells, objectAtIndex, i);
      const SDL_Rect renderFrame = $(cell, renderFrame);
 
      if (renderFrame.x + renderFrame.w >= point->x) {
        return $(columns, objectAtIndex, i);
      }
    }
  }
 
  return NULL;
}
 
static TableColumn *columnWithIdentifier(const TableView *self, const char *identifier) {
 
  assert(identifier);
 
  const Array *columns = (Array *) self->columns;
  for (size_t i = 0; i < columns->count; i++) {
 
    TableColumn *column = $(columns, objectAtIndex, i);
    if (strcmp(identifier, column->identifier) == 0) {
      return column;
    }
  }
 
  return NULL;
}
 
static void deselectAll_enumerate(const Array *array, ident obj, ident data) {
  $((TableRowView *) obj, setSelected, false);
}
 
static void deselectAll(TableView *self) {
  $((Array *) self->rows, enumerate, deselectAll_enumerate, NULL);
}
 
static void deselectRowAtIndex(TableView *self, size_t index) {
 
  const Array *rows = (Array *) self->rows;
  if (index < rows->count) {
 
    TableRowView *row = $(rows, objectAtIndex, index);
    $(row, setSelected, false);
  }
}
 
static void deselectRowsAtIndexes(TableView *self, const IndexSet *indexes) {
 
  if (indexes) {
    for (size_t i = 0; i < indexes->count; i++) {
      $(self, deselectRowAtIndex, indexes->indexes[i]);
    }
  }
}
 
static TableView *initWithFrame(TableView *self, const SDL_Rect *frame) {
 
  self = (TableView *) super(Control, self, initWithFrame, frame);
  if (self) {
    self->columns = $$(Array, array);
    assert(self->columns);
 
    self->rows = $$(Array, array);
    assert(self->rows);
 
    self->headerView = $(alloc(TableHeaderView), initWithTableView, self);
    assert(self->headerView);
 
    $((View *) self, addSubview, (View *) self->headerView);
 
    self->contentView = $(alloc(StackView), initWithFrame, NULL);
    assert(self->contentView);
 
    $((View *) self->contentView, addClassName, "contentView");
 
    self->scrollView = $(alloc(ScrollView), initWithFrame, NULL);
    assert(self->scrollView);
 
    $(self->scrollView, setContentView, (View *) self->contentView);
 
    $((View *) self, addSubview, (View *) self->scrollView);
  }
 
  return self;
}
 
static SDL_Size naturalSize(const TableView *self) {
 
  const SDL_Size headerSize = $((View *) self->headerView, sizeThatFits);
  const SDL_Size contentSize = $((View *) self->contentView, sizeThatFits);
 
  SDL_Size size = MakeSize(max(headerSize.w, contentSize.w), headerSize.h + contentSize.h);
 
  View *this = (View *) self;
 
  size.w += this->padding.left + this->padding.right;
  size.h += this->padding.top + this->padding.bottom;
 
  return size;
}
 
static void reloadData_removeRows(const Array *array, ident obj, ident data) {
  $((View *) data, removeSubview, (View *) obj);
}
 
static void reloadData(TableView *self) {
 
  assert(self->dataSource.numberOfRows);
  assert(self->delegate.cellForColumnAndRow);
 
  $(self->rows, removeAllObjectsWithEnumerator, reloadData_removeRows, self->contentView);
 
  TableRowView *headerView = (TableRowView *) self->headerView;
  $(headerView, removeAllCells);
 
  const Array *columns = (Array *) self->columns;
  for (size_t i = 0; i < columns->count; i++) {
 
    const TableColumn *column = $(columns, objectAtIndex, i);
    $(headerView, addCell, (TableCellView *) column->headerCell);
  }
 
  const size_t numberOfRows = self->dataSource.numberOfRows(self);
  for (size_t i = 0; i < numberOfRows; i++) {
 
    TableRowView *row = $(alloc(TableRowView), initWithTableView, self);
    assert(row);
 
    for (size_t j = 0; j < columns->count; j++) {
      const TableColumn *column = $(columns, objectAtIndex, j);
 
      TableCellView *cell = self->delegate.cellForColumnAndRow(self, column, i);
      assert(cell);
 
      cell->view.identifier = strdup(column->identifier);
 
      $(row, addCell, cell);
      release(cell);
    }
 
    $(self->rows, addObject, row);
    release(row);
 
    $((View *) self->contentView, addSubview, (View *) row);
  }
 
  $((View *) self, setNeedsLayout);
}
 
static void removeColumn(TableView *self, TableColumn *column) {
 
  assert(column);
 
  if (self->sortColumn == column) {
    self->sortColumn->order = OrderSame;
    self->sortColumn = NULL;
  }
 
  $(self->columns, removeObject, column);
 
  $((TableRowView *) self->headerView, removeCell, (TableCellView *) column->headerCell);
}
 
static ssize_t rowAtPoint(const TableView *self, const SDL_Point *point) {
 
  const SDL_Rect scrollFrame = $((View *) self->scrollView, renderFrame);
  if (SDL_PointInRect(point, &scrollFrame)) {
 
    const Array *rows = (Array *) self->rows;
    for (size_t i = 0; i < rows->count; i++) {
 
      const View *row = $(rows, objectAtIndex, i);
      if ($(row, containsPoint, point)) {
        return i;
      }
    }
  }
 
  return -1;
}
 
static void selectAll_enumerate(const Array *array, ident obj, ident data) {
  $((TableRowView *) obj, setSelected, true);
}
 
static void selectAll(TableView *self) {
  $((Array *) self->rows, enumerate, selectAll_enumerate, NULL);
}
 
static IndexSet *selectedRowIndexes(const TableView *self) {
 
  size_t indexes[self->rows->count];
  size_t count = 0;
 
  const Array *rows = (Array *) self->rows;
  for (size_t i = 0; i < rows->count; i++) {
 
    const TableRowView *row = $(rows, objectAtIndex, i);
    if (row->isSelected) {
      indexes[count++] = i;
    }
  }
 
  return $(alloc(IndexSet), initWithIndexes, indexes, count);
}
 
static void selectRowAtIndex(TableView *self, size_t index) {
 
  const Array *rows = (Array *) self->rows;
  if (index < rows->count) {
 
    TableRowView *row = $(rows, objectAtIndex, index);
    if (!row->isSelected) {
      $(row, setSelected, true);
    }
  }
}
 
static void selectRowsAtIndexes(TableView *self, const IndexSet *indexes) {
 
  if (indexes) {
    for (size_t i = 0; i < indexes->count; i++) {
      $(self, selectRowAtIndex, indexes->indexes[i]);
    }
  }
}
 
static void setSortColumn(TableView *self, TableColumn *column) {
 
  if (self->sortColumn != column) {
 
    if (self->sortColumn) {
      self->sortColumn->order = OrderSame;
      self->sortColumn = NULL;
    }
 
    if (column) {
      assert($((Array *) self->columns, containsObject, column));
 
      self->sortColumn = column;
      self->sortColumn->order = OrderAscending;
    }
  } else {
    if (self->sortColumn) {
      self->sortColumn->order = (Order) -self->sortColumn->order;
    }
  }
 
  if (self->delegate.didSetSortColumn) {
    self->delegate.didSetSortColumn(self);
  }
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
  ((ViewInterface *) clazz->interface)->awakeWithDictionary = awakeWithDictionary;
  ((ViewInterface *) clazz->interface)->init = init;
  ((ViewInterface *) clazz->interface)->layoutSubviews = layoutSubviews;
  ((ViewInterface *) clazz->interface)->sizeThatFits = sizeThatFits;
 
  ((ControlInterface *) clazz->interface)->captureEvent = captureEvent;
 
  ((TableViewInterface *) clazz->interface)->addColumn = addColumn;
  ((TableViewInterface *) clazz->interface)->addColumnWithIdentifier = addColumnWithIdentifier;
  ((TableViewInterface *) clazz->interface)->columnAtPoint = columnAtPoint;
  ((TableViewInterface *) clazz->interface)->columnWithIdentifier = columnWithIdentifier;
  ((TableViewInterface *) clazz->interface)->deselectAll = deselectAll;
  ((TableViewInterface *) clazz->interface)->deselectRowAtIndex = deselectRowAtIndex;
  ((TableViewInterface *) clazz->interface)->deselectRowsAtIndexes = deselectRowsAtIndexes;
  ((TableViewInterface *) clazz->interface)->initWithFrame = initWithFrame;
  ((TableViewInterface *) clazz->interface)->naturalSize = naturalSize;
  ((TableViewInterface *) clazz->interface)->reloadData = reloadData;
  ((TableViewInterface *) clazz->interface)->removeColumn = removeColumn;
  ((TableViewInterface *) clazz->interface)->rowAtPoint = rowAtPoint;
  ((TableViewInterface *) clazz->interface)->selectedRowIndexes = selectedRowIndexes;
  ((TableViewInterface *) clazz->interface)->selectAll = selectAll;
  ((TableViewInterface *) clazz->interface)->selectRowAtIndex = selectRowAtIndex;
  ((TableViewInterface *) clazz->interface)->selectRowsAtIndexes = selectRowsAtIndexes;
  ((TableViewInterface *) clazz->interface)->setSortColumn = setSortColumn;
}
 
Class *_TableView(void) {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "TableView",
      .superclass = _Control(),
      .instanceSize = sizeof(TableView),
      .interfaceSize = sizeof(TableViewInterface),
      .initialize = initialize,
    });
  });
 
  return clazz;
}
 
#undef _Class