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IN NO EVENT SHALL THE COPYRIGHT 2293ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2493ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2593ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2693ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) */ 3093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 3193ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)#ifndef PageScaleConstraintsSet_h 3293ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)#define PageScaleConstraintsSet_h 3393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 3493ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)#include "PageScaleConstraints.h" 3593ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)#include "core/dom/ViewportArguments.h" 3693ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)#include "core/platform/graphics/IntSize.h" 3793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 3893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)namespace WebCore { 3993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 4093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)// This class harmonizes the viewport (particularly page scale) constraints from 4193ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)// the meta viewport tag and other sources. 4293ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)class PageScaleConstraintsSet { 4393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)public: 4493ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) PageScaleConstraintsSet(); 4593ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 4693ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) PageScaleConstraints defaultConstraints() const; 4793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 4893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // Settings defined in the website's viewport tag, if viewport tag support 4993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // is enabled. 5093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) const PageScaleConstraints& pageDefinedConstraints() const { return m_pageDefinedConstraints; } 5193ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) void updatePageDefinedConstraints(const ViewportArguments&, IntSize viewSize, int layoutFallbackWidth); 52646fe2d7c64a42a490afacc3ad4851b9911c695dTorne (Richard Coles) void adjustForAndroidWebViewQuirks(const ViewportArguments&, IntSize viewSize, int layoutFallbackWidth, float deviceScaleFactor, bool supportTargetDensityDPI, bool wideViewportQuirkEnabled, bool useWideViewport, bool loadWithOverviewMode); 5393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 5493ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // Constraints may also be set from Chromium -- this overrides any 5593ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // page-defined values. 5693ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) const PageScaleConstraints& userAgentConstraints() const { return m_userAgentConstraints; } 5793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) void setUserAgentConstraints(const PageScaleConstraints&); 5893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 5993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // Actual computed values, taking into account the above plus the current 6093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // viewport size and document width. 6193ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) const PageScaleConstraints& finalConstraints() const { return m_finalConstraints; } 6293ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) void computeFinalConstraints(); 6393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) void adjustFinalConstraintsToContentsSize(IntSize viewSize, IntSize contentsSize, int nonOverlayScrollbarWidth); 6493ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 6593ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) void didChangeContentsSize(IntSize contentsSize, float pageScaleFactor); 6693ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 6793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // This should be set to true on each page load to note that the page scale 6893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // factor needs to be reset to its initial value. 6993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) void setNeedsReset(bool); 7093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) bool needsReset() const { return m_needsReset; } 7193ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 7293ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // This is set when one of the inputs to finalConstraints changes. 7393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) bool constraintsDirty() const { return m_constraintsDirty; } 7493ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 7593ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)private: 76967c603b7d25a9715865ef349860323081912ff6Alexandre Elias PageScaleConstraints computeConstraintsStack() const; 77967c603b7d25a9715865ef349860323081912ff6Alexandre Elias 7893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) PageScaleConstraints m_pageDefinedConstraints; 7993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) PageScaleConstraints m_userAgentConstraints; 8093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) PageScaleConstraints m_finalConstraints; 8193ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 8293ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) int m_lastContentsWidth; 8393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 8493ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) bool m_needsReset; 8593ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) bool m_constraintsDirty; 8693ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)}; 8793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 8893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)} // namespace WebCore 8993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) 9093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)#endif // PageScaleConstraintsSet_h 91