TableView.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for OpenGL, SDL2 and GNU 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 "SoundStage.h"
#include "TableView.h"
 
#define _Class _TableView
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
    TableView *this = (TableView *) self;
 
    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, enumerateObjects, 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->hidden == false) {
 
        const SDL_Size size = $(headerView, sizeThatFits);
 
        frame.y += size.h;
        frame.h -= size.h;
    }
 
    scrollView->frame = frame;
}
 
static SDL_Size sizeThatFits(const View *self) {
 
    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_MOUSEBUTTONUP) {
 
        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);
                                MVC_PlaySound(
                            }
                            break;
                        case ControlSelectionMultiple:
                            if (SDL_GetModState() & (KMOD_CTRL | 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, enumerateObjects, 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 = $$(MutableArray, array);
        assert(self->columns);
 
        self->rows = $$(MutableArray, 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);
    }
 
    self->control.view.needsLayout = true;
}
 
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, enumerateObjects, selectAll_enumerate, NULL);
}
 
static IndexSet *selectedRowIndexes(const TableView *self) {
 
    size_t indexes[self->rows->array.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);
        $(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 = -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),
            .interfaceOffset = offsetof(TableView, interface),
            .interfaceSize = sizeof(TableViewInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}
 
#undef _Class