plugins/Unity/categories.cpp · unity8

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unity8/plugins/Unity/categories.cpp

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1/*

3 *

4 * Authors:

5 * Michał Sawicz <michal.sawicz@canonical.com>

6 * Michal Hruby <michal.hruby@canonical.com>

7 *

8 * This program is free software; you can redistribute it and/or modify

9 * it under the terms of the GNU General Public License as published by

10 * the Free Software Foundation; version 3.

11 *

12 * This program is distributed in the hope that it will be useful,

13 * but WITHOUT ANY WARRANTY; without even the implied warranty of

14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

15 * GNU General Public License for more details.

16 *

17 * You should have received a copy of the GNU General Public License

18 * along with this program. If not, see <http://www.gnu.org/licenses/>.

19 */

21// self

22#include "categories.h"

23#include "categoryresults.h"

24#include <QDebug>

26// TODO: use something from libunity once it's public

27enum CategoryColumn {

28 ID,

29 DISPLAY_NAME,

30 ICON_HINT,

31 RENDERER_NAME,

32 HINTS

33};

35Categories::Categories(QObject* parent)

36 : DeeListModel(parent)

37{

38 m_roles[Categories::RoleCategoryId] = "categoryId";

39 m_roles[Categories::RoleName] = "name";

40 m_roles[Categories::RoleIcon] = "icon";

41 m_roles[Categories::RoleRenderer] = "renderer";

42 m_roles[Categories::RoleContentType] = "contentType";

43 m_roles[Categories::RoleRendererHint] = "rendererHint";

44 m_roles[Categories::RoleProgressSource] = "progressSource";

45 m_roles[Categories::RoleHints] = "hints";

46 m_roles[Categories::RoleResults] = "results";

47 m_roles[Categories::RoleCount] = "count";

49 // TODO This should not be needed but accumulatting the count changes

50 // makes the visualization more stable and also makes crashes on fast

51 // change of the search term harder to reproduce

52 m_timer.setSingleShot(true);

53 m_timer.setInterval(50);

54 connect(&m_timer, &QTimer::timeout, this, &Categories::onEmitCountChanged);

55}

57DeeListModel*

58Categories::getResults(int index) const

59{

60 if (!m_results.contains(index)) {

61 CategoryResults* results = new CategoryResults(const_cast<Categories*>(this));

62 results->setCategoryIndex(index);

63 connect(results, &DeeListModel::countChanged, this, &Categories::onCountChanged);

65 unsigned categoryIndex = static_cast<unsigned>(index);

66 auto unity_results = m_unityScope->GetResultsForCategory(categoryIndex);

67 if (unity_results) {

68 results->setModel(unity_results->model());

69 } else {

70 // No results model returned by unity core; this can be the case when the global

71 // results model of this scope is still not set in unity core. Don't set backend

72 // model in DeeListModel - it will still beahve properly as an empty model. Since

73 // we're connected to the category model change signal, and it is set by unity core

74 // at the same time as results model (on channel opening), we'll reset category

75 // results models with proper models when we're notifed again.

76 qWarning() << "No results model for category" << categoryIndex;

77 }

79 m_results.insert(index, results);

80 }

82 return m_results[index];

83}

85void Categories::onCategoriesModelChanged(unity::glib::Object<DeeModel> model)

86{

87 m_updatedCategories.clear();

88 // FIXME: this might destroy the renderer view and re-create it, optimize?

89 Q_FOREACH(DeeListModel* model, m_results) {

90 delete model;

91 }

92 m_results.clear();

93 m_categoryOrder.clear();

95 setModel(model);

96}

98void Categories::onCategoryOrderChanged(const std::vector<unsigned int>& cat_order)

99{

100 for (unsigned int pos = 0; pos<cat_order.size(); pos++)

101 {

102 unsigned int cat = cat_order[pos];

103 const int old_pos = m_categoryOrder.indexOf(cat);

104

105 if (old_pos < 0) {

106 qWarning() << "No such category index:" << cat;

107 continue;

108 }

109

110 if (static_cast<int>(pos) != old_pos) {

111 int target_pos = pos;

112 if (target_pos > old_pos)

113 target_pos++;

114 const bool status = beginMoveRows(QModelIndex(), old_pos, old_pos, QModelIndex(), target_pos);

115 if (status)

116 m_categoryOrder.move(old_pos, pos);

117 else

118 qWarning() << "beginMoveRows failed:" << old_pos << target_pos;

119 endMoveRows();

120 }

121 }

122}

123

124void

125Categories::setUnityScope(const unity::dash::Scope::Ptr& scope)

126{

127 m_unityScope = scope;

128

129 // no need to call this, we'll get notified

130 //setModel(m_unityScope->categories()->model());

131

132 m_signals.disconnectAll();

133 m_signals << m_unityScope->categories()->model.changed.connect(sigc::mem_fun(this, &Categories::onCategoriesModelChanged));

134 m_signals << m_unityScope->category_order.changed.connect(sigc::mem_fun(this, &Categories::onCategoryOrderChanged));

135}

136

137void

138Categories::onCountChanged()

139{

140 CategoryResults* results = qobject_cast<CategoryResults*>(sender());

141 if (results) {

142 if (!m_updatedCategories.contains(results->categoryIndex())) {

143 m_updatedCategories << results->categoryIndex();

144 }

145 m_timer.start();

146 }

147}

148

149void Categories::onRowCountChanged()

150{

151 QAbstractItemModel* model = qobject_cast<QAbstractItemModel*>(sender());

152 // find the corresponding category index

153 for (auto iter = m_overriddenCategories.begin(); iter != m_overriddenCategories.end(); ++iter) {

154 if (iter.value() == model) {

155 for (int i = 0; i < rowCount(); i++) {

156 auto id = data(index(i), RoleCategoryId).toString();

157 if (id != iter.key()) continue;

158 QVector<int> roles;

159 roles.append(RoleCount);

160 QModelIndex changedIndex = index(i);

161 Q_EMIT dataChanged(changedIndex, changedIndex, roles);

162 break;

163 }

164 }

165 }

166}

167

168void

169Categories::onEmitCountChanged()

170{

171 QVector<int> roles;

172 roles.append(Categories::RoleCount);

173 Q_FOREACH(int categoryIndex, m_updatedCategories) {

174 if (!m_results.contains(categoryIndex)) continue;

175 const int realIndex = m_categoryOrder.indexOf(categoryIndex);

176 const QModelIndex changedIndex = index(realIndex);

177 Q_EMIT dataChanged(changedIndex, changedIndex, roles);

178 }

179 m_updatedCategories.clear();

180}

181

182QHash<int, QByteArray>

183Categories::roleNames() const

184{

185 return m_roles;

186}

187

188void Categories::onOverrideModelDestroyed()

189{

190 QObject* model = sender();

191 auto iter = m_overriddenCategories.begin();

192 while (iter != m_overriddenCategories.end()) {

193 if (iter.value() == model) {

194 iter = m_overriddenCategories.erase(iter);

195 continue;

196 }

197 ++iter;

198 }

199}

200

201void Categories::overrideResults(const QString& categoryId, QAbstractItemModel* model)

202{

203 m_overriddenCategories[categoryId] = model;

204 // watch the model

205 connect(model, &QObject::destroyed, this, &Categories::onOverrideModelDestroyed);

206 connect(model, &QAbstractItemModel::rowsInserted, this, &Categories::onRowCountChanged);

207 connect(model, &QAbstractItemModel::rowsRemoved, this, &Categories::onRowCountChanged);

208 connect(model, &QAbstractItemModel::modelReset, this, &Categories::onRowCountChanged);

209

210 // emit the dataChanged signal if the category is already in the model

211 for (int i = 0; i < rowCount(); i++) {

212 auto id = data(index(i), RoleCategoryId).toString();

213 if (id != categoryId) continue;

214 QVector<int> roles;

215 roles.append(RoleCount);

216 roles.append(RoleResults);

217 QModelIndex changedIndex = index(i);

218 Q_EMIT dataChanged(changedIndex, changedIndex, roles);

219 break;

220 }

221}

222

223QVariant

224Categories::data(const QModelIndex& index, int role) const

225{

226 if (!index.isValid()) {

227 return QVariant();

228 }

229

230 if (m_categoryOrder.size() != rowCount())

231 {

232 // populate category order vector with 0..n

233 m_categoryOrder.clear();

234 const unsigned int lim = rowCount();

235 for (unsigned int i = 0; i<lim; i++) {

236 m_categoryOrder.append(i);

237 }

238 }

239

240 int realRow = index.row();

241 if (index.row() < m_categoryOrder.size()) {

242 realRow = m_categoryOrder[index.row()];

243 } else {

244 qWarning() << "Invalid index" << index.row();

245 return QVariant();

246 }

247

248 const QModelIndex realIndex = createIndex(realRow, index.column());

249

250 switch (role) {

251 case RoleCategoryId:

252 return DeeListModel::data(realIndex, CategoryColumn::ID);

253 case RoleName:

254 return DeeListModel::data(realIndex, CategoryColumn::DISPLAY_NAME);

255 case RoleIcon:

256 return DeeListModel::data(realIndex, CategoryColumn::ICON_HINT);

257 case RoleRenderer:

258 return DeeListModel::data(realIndex, CategoryColumn::RENDERER_NAME);

259 case RoleContentType:

260 {

261 auto hints = DeeListModel::data(realIndex, CategoryColumn::HINTS).toHash();

262 return hints.contains("content-type") ? hints["content-type"] : QVariant(QString("default"));

263 }

264 case RoleRendererHint:

265 {

266 auto hints = DeeListModel::data(realIndex, CategoryColumn::HINTS).toHash();

267 return hints.contains("renderer-hint") ? hints["renderer-hint"] : QVariant(QString());

268 }

269 case RoleProgressSource:

270 {

271 auto hints = DeeListModel::data(realIndex, CategoryColumn::HINTS).toHash();

272 return hints.contains("progress-source") ? hints["progress-source"] : QVariant();

273 }

274 case RoleHints:

275 return DeeListModel::data(realIndex, CategoryColumn::HINTS);

276 case RoleResults:

277 if (m_overriddenCategories.size() > 0)

278 {

279 auto id = DeeListModel::data(realIndex, CategoryColumn::ID).toString();

280 if (m_overriddenCategories.find(id) != m_overriddenCategories.end())

281 return QVariant::fromValue(m_overriddenCategories[id]);

282 }

283 return QVariant::fromValue(getResults(realRow));

284 case RoleCount:

285 if (m_overriddenCategories.size() > 0)

286 {

287 auto id = DeeListModel::data(realIndex, CategoryColumn::ID).toString();

288 if (m_overriddenCategories.find(id) != m_overriddenCategories.end())

289 {

290 return QVariant::fromValue(m_overriddenCategories[id]->rowCount());

291 }

292 }

293 return QVariant::fromValue(getResults(realRow)->rowCount());

294 default:

295 return QVariant();

296 }

297}